NVEncC_Options.en.md

NVEncC option list

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• Command line example
  • Basic commands
  • More practical commands
    • example of using hw decoder
    • example of using hw decoder (interlaced)
    • avs (Avisynth) example (avs and vpy can also be read via vfw)
    • example of pipe usage
    • pipe usage from ffmpeg
    • Passing video & audio from ffmpeg
• Option format
• Display options
  • -h, -? --help
  • -v, --version
  • --option-list
  • --check-device
  • --check-hw [<int>]
  • --check-features [<int>]
  • --check-environment
  • --check-codecs, --check-decoders, --check-encoders
  • --check-profiles <string>
  • --check-formats
  • --check-protocols
  • --check-avdevices
  • --check-filters
  • --check-avversion
• Basic encoding options
  • -d, --device <int>
  • -c, --codec <string>
  • -o, --output <string>
  • -i, --input <string>
  • --raw
  • --y4m
  • --avi
  • --avs
  • --vpy
  • --avsw [<string>]
  • --avhw
  • --interlace <string>
  • --video-track <int>
  • --crop <int>,<int>,<int>,<int>
  • --frames <int>
  • --fps <int>/<int> or <float>
  • --input-res <int>x<int>
  • --output-res <int>x<int>[,<string>=<string>]
  • --input-csp <string>
• Encode Mode Options
  • --qvbr <float>
  • --cbr <int>
  • --vbr <int>
  • --cqp <int> or <int>:<int>:<int>
• Other Options for Encoder
  • -u, --preset
  • --output-depth <int>
  • --output-csp <string>
  • --multipass <string>
  • --lossless [H.264/HEVC]
  • --max-bitrate <int>
  • --vbv-bufsize <int>
  • --qp-init <int> or <int>:<int>:<int>
  • --qp-min <int> or <int>:<int>:<int>
  • --qp-max <int> or <int>:<int>:<int>
  • --chroma-qp-offset <int> [H.264/HEVC]
  • --vbr-quality <float>
  • --dynamic-rc <int>:<int>:<int><int>,<param1>=<value1>[,<param2>=<value2>],...
  • --lookahead <int>
  • --lookahead-level <int> [HEVC]
  • --no-i-adapt
  • --no-b-adapt
  • --strict-gop
  • --gop-len <int>
  • -b, --bframes <int>
  • --ref <int>
  • --multiref-l0 <int> [H.264/HEVC]
  • --multiref-l1 <int> [H.264/HEVC]
  • --weightp
  • --nonrefp
  • --aq
  • --aq-temporal
  • --aq-strength <int>
  • --bref-mode <string>
  • --direct <string> [H.264]
  • --(no-)adapt-transform [H.264]
  • --hierarchial-p [H.264]
  • --hierarchial-b [H.264]
  • --temporal-layers <int> [H.264]
  • --mv-precision <string>
  • --slices <int> [H.264/HEVC]
  • --cabac [H.264]
  • --cavlc [H.264]
  • --bluray [H.264]
  • --(no-)deblock [H.264]
  • --cu-max <int> [HEVC]
  • --cu-min <int> [HEVC]
  • --alpha-bitrate-ratio <int> [HEVC]
  • --alpha-channel-mode <string> [HEVC]
  • --tf-level <int> [HEVC]
  • --part-size-min <int> [AV1]
  • --part-size-max <int> [AV1]
  • --tile-columns <int> [AV1]
  • --tile-rows <int> [AV1]
  • --max-temporal-layers <int> [AV1]
  • --refs-forward <int> [AV1]
  • --refs-backward <int> [AV1]
  • --level <string>
  • --profile <string>
  • --tier <string>
  • --sar <int>:<int>
  • --dar <int>:<int>
  • --colorrange <string>
  • --videoformat <string>
  • --colormatrix <string>
  • --colorprim <string>
  • --transfer <string>
  • --chromaloc <int> or "auto"
  • --max-cll <int>,<int> or "copy" [HEVC, AV1]
  • --master-display <string> or "copy" [HEVC, AV1]
  • --atc-sei <string> or <int> [HEVC only]
  • --dhdr10-info <string> [HEVC, AV1]
  • --dhdr10-info copy [HEVC, AV1]
  • --dolby-vision-profile <string> [HEVC, AV1]
  • --dolby-vision-rpu <string> [HEVC, AV1]
  • --dolby-vision-rpu copy [HEVC, AV1]
  • --dolby-vision-rpu-prm <param1>=<value1>[,<param2>=<value2>]...
  • --aud [H.264/HEVC]
  • --repeat-headers
  • --pic-struct [H.264/HEVC]
  • --split-enc <string>
  • --ssim
  • --psnr
  • --vmaf [<param1>=<value1>][,<param2>=<value2>],...
• IO / Audio / Subtitle Options
  • --input-analyze <float>
  • --input-probesize <int>
  • --trim <int>:<int>[,<int>:<int>][,<int>:<int>]...
  • --seek [<int>:][<int>:]<int>[.<int>]
  • --seekto [<int>:][<int>:]<int>[.<int>]
  • --input-format <string>
  • -f, --output-format <string>
  • --video-track <int>
  • --video-streamid <int>
  • --video-tag <string>
  • --video-metadata <string> or <string>=<string>
  • --audio-copy [<int/string>;[,<int/string>]...]
  • --audio-codec [[<int/string>?]<string>[:<string>=<string>[,<string>=<string>]...]...]
  • --audio-bitrate [<int/string>?]<int>
  • --audio-quality [<int/string>?]<int>
  • --audio-profile [<int/string>?]<string>
  • --audio-stream [<int/string>?]{<string1>}[:<string2>]
  • --audio-samplerate [<int/string>?]<int>
  • --audio-resampler <string>
  • --audio-delay [<int/string>?]<float>
  • --audio-file [<int/string>?][<string>]<string>
  • --audio-filter [<int/string>?]<string>
  • --audio-disposition [<int/string>?]<string>[,<string>][]...
  • --audio-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>
  • --audio-bsf [<int/string>?]<string>
  • --audio-ignore-decode-error <int>
  • --audio-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]
  • --chapter <string>
  • --chapter-copy
  • --chapter-no-trim
  • --key-on-chapter
  • --keyfile <string>
  • --sub-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]
  • --sub-copy [<int/string>;[,<int/string>]...]
  • --sub-disposition [<int/string>?]<string>
  • --sub-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>
  • --sub-bsf [<int/string>?]<string>
  • --data-copy [<int>[,<int>]...]
  • --attachment-copy [<int>[,<int>]...]
  • --attachment-source <string>[:{<int>?}[;<param1>=<value1>]...]...
  • --input-option <string1>:<string2>
  • -m, --mux-option <string1>:<string2>
  • --metadata <string> or <string>=<string>
  • --avsync <string>
  • --timecode [<string>]
  • --tcfile-in <string>
  • --timebase <int>/<int>
  • --input-hevc-bsf <string>
  • --allow-other-negative-pts
• Vpp Options
  • Vpp Filtering order
  • --vpp-colorspace [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-libplacebo-tonemapping [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-libplacebo-tonemapping-lut <string>
  • --vpp-delogo <string>[,<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-rff
  • --vpp-deinterlace <string>
  • --vpp-afs [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-nnedi [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-yadif [<param1>=<value1>]
  • --vpp-decomb [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-decimate [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-mpdecimate [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-select-every <int>[,<param1>=<int>]
  • --vpp-rotate <int>
  • --vpp-transform [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-convolution3d [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-nvvfx-denoise [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-nvvfx-artifact-reduction [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-smooth [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-denoise-dct [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-fft3d [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-knn [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-nlmeans [<param1>=<value1>[,<param2>=<value2>]...]
  • --vpp-pmd [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-gauss <int>
  • --vpp-subburn [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-libplacebo-shader [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-resize <string> or [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-unsharp [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-edgelevel [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-warpsharp [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-tweak [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-curves [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-deband [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-libplacebo-deband [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-pad <int>,<int>,<int>,<int>
  • --vpp-overlay [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-ngx-truehdr [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-fruc [<param1>=<value1>][,<param2>=<value2>],...
  • --vpp-perf-monitor
  • --vpp-nvvfx-model-dir <string>
• Other Options
  • --cuda-schedule <string>
  • --disable-nvml <int>
  • --disable-nvml
  • --output-buf <int>
  • --output-thread <int>
  • --log <string>
  • --log-level [<param1>=]<value>[,<param2>=<value>]...
  • --log-opt <param1>=<value>[,<param2>=<value>]...
  • --log-framelist [<string>]
  • --log-packets [<string>]
  • --log-mux-ts [<string>]
  • --thread-affinity [<string1>=]{<string2>[#<int>[:<int>]...] or 0x<hex>}
  • --thread-priority [<string1>=]<string2>[#<int>[:<int>]...]
  • --thread-throttling [<string1>=]<string2>[#<int>[:<int>]...]
  • --option-file <string>
  • --max-procfps <int>
  • --lowlatency
  • --avsdll <string>
  • --vsdir <string>
  • --process-codepage <string> [Windows OS only]
  • --perf-monitor [<string>[,<string>]...]
  • --perf-monitor-interval <int>

Command line example

Basic commands

NVEncC.exe [Options] -i <filename> -o <filename>

More practical commands

example of using hw decoder

NVEncC --avhw -i "<mp4(H.264/AVC) file>" -o "<outfilename.264>"

example of using hw decoder (interlaced)

NVEncC --avhw --interlace tff -i "<mp4(H.264/AVC) file>" -o "<outfilename.264>"

avs (Avisynth) example (avs and vpy can also be read via vfw)

NVEncC -i "<avsfile>" -o "<outfilename.264>"

example of pipe usage

avs2pipemod -y4mp "<avsfile>" | NVEncC --y4m -i - -o "<outfilename.264>"

pipe usage from ffmpeg

ffmpeg -y -i "<inputfile>" -an -pix_fmt yuv420p -f yuv4mpegpipe - | NVEncC --y4m -i - -o "<outfilename.264>"

Passing video & audio from ffmpeg

--> use "nut" to pass both video & audio thorough pipe.

ffmpeg -y -i "<input>" <options for ffmpeg> -codec:a copy -codec:v rawvideo -pix_fmt yuv420p -f nut - | NVEncC --avsw -i - --audio-codec aac -o "<outfilename.mp4>"

Option format

-<short option name>, --<option name> <argument>

The argument type is
- none
- <int>    ... use integer
- <float>  ... use decimal point
- <string> ... use character string

The argument with [ ] { } brackets are optional.
"..." means repeat of previous block.

--(no-)xxx
If it is attached with --no-xxx, you get the opposite effect of --xxx.
Example 1: --xxx: enable xxx → --no-xxx: disable xxx
Example 2: --xxx: disable xxx → --no-xxx: enable xxx

Display options

-h, -? --help

Show help

-v, --version

Show version of NVEncC

--option-list

Show option list.

--check-device

Show device of available GPU recognized by NVEnc

--check-hw [<int>]

Check whether the specified device is able to run NVEnc. DeviceID: "0" will be checked if not specified.

--check-features [<int>]

Show the information of features of the specified device. DeviceID: "0" will be checked if not specified.

--check-environment

Show environment information recognized by NVEncC

--check-codecs, --check-decoders, --check-encoders

Show available audio codec names

--check-profiles <string>

Show profile names available for specified codec

--check-formats

Show available output format

--check-protocols

Show available protocols

--check-avdevices

Show available devices (from libavdevice)

--check-filters

Show available audio filters

--check-avversion

Show version of ffmpeg dll

Basic encoding options

-d, --device <int>

Specify the deviceId to be used with NVEnc. deviceID can be checked with --check-device.

If unspecified, and you are running on multi-GPU environment, the device to be used will automatically selected, depending on following conditions...

• whether the device supports specified encoding
• if --avhw is specified, then check whether the device supports hw decoding for the input file
• if interlaced encoding is specified, then check if it is supported
• device with lower Video Engine Utilization will be favored
• device with lower GPU Utilization will be favored
• later generation GPU will be favored
• GPU with more cores will be favored

Utilization of the Video Engine and GPU is obtained using NVML library in x64 version, and nvidia-smi.exe is executed in x86 version.

nvidia-smi is usually installed in "C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" with the driver.

-c, --codec <string>

Specify the output codec

• h264 (default)

• hevc

• av1

• raw

  -c raw will not encode and output raw frames. The format of raw frames will be y4m by default. This can be changed to raw fromat by adding -f raw.

-o, --output <string>

Set output file name, pipe output with "-".

-i, --input <string>

Set input file name, pipe input with "-".

Table below shows the supported readers of NVEnc. When input format is not set, reader used will be selected depending on the extension of input file.

Auto selection of reader

reader	target extension
Avisynth reader	avs
VapourSynth reader	vpy
avi reader	avi
y4m reader	y4m
raw reader	yuv
avhw/avsw reader	others

color format supported by reader

reader	yuv420	yuy2	yuv422	yuv444	rgb24	rgb32
raw	◎		◎	◎
y4m	◎		◎	◎
avi	○	○			○	○
avs	◎	○	◎	◎	○	○
vpy	◎		◎	◎
avhw	□			◇
avsw	◎		◎	◎	○	○

◎ ... 8bit / 9bit / 10bit / 12bit / 14bit / 16bit supported
◇ ... 8bit / 10bit / 12bit supported
□ ... 8bit / 10bit supported
○ ... support only 8 bits
No marks ... not supported

--raw

Set the input to raw format. input resolution & input fps must also be set.

--y4m

Read input as y4m (YUV4MPEG2) format.

--avi

Read avi file using avi reader.

--avs

Read Avisynth script file using avs reader.

NVEncC works on UTF-8 mode as default, so the Avisynth script is required to be also in UTF-8 when using non ASCII characters. When using scripts in the default codepage of the OS, such as ANSI, you will need to add "--process-codepage os" option to change NVEncC also work on the default codepage of the OS.

--vpy

Read VapourSynth script file using vpy reader.

--avsw [<string>]

Read input file using avformat + libavcodec's sw decoder. The optional parameter will set decoder name to be used, otherwise decoder will be selected automatically.

--avhw

Read input file using avformat + QSV hw decoder. Using this mode will provide maximum performance, since entire transcode process will be run on the GPU.

Codecs supported by avhw reader

Codecs	Status
MPEG1	○
MPEG2	○
H.264/AVC	○
H.265/HEVC	○
VP8	×
VP9	○
AV1	○
VC-1	○
WMV3/WMV9	×

○ ... supported
× ... no support

--interlace <string>

Set interlace flag of input frame.

Deinterlace is available through --vpp-deinterlace or --vpp-afs. If deinterlacer is not activated for interlaced input, then interlaced encoding is performed.

• parameters
  • progressive ... progressive
  • tff ... top field first
  • bff ... Bottom Field First
  • auto ... detect each frame (available only for avhw/avsw reader)

--video-track <int>

Set video track to encode in track id. Will be active when used with avhw/avsw reader.

• 1 (default) highest resolution video track
• 2 next high resolution video track ...
• -1 lowest resolution video track
• -2 next low resolution video track ...

--crop <int>,<int>,<int>,<int>

Number of pixels to cropped from left, top, right, bottom.

--frames <int>

Number of frames to input. (Note: input base, not output base)

--fps <int>/<int> or <float>

Set the input frame rate when --raw is used. Not recommended to be used with readers other than --raw.

Only valid for raw format (when --raw is used), otherwise it will be ignored or only treated as a hint.

--input-res <int>x<int>

Set input resolution. Only valid for raw format, otherwise it will be ignored.

--output-res <int>x<int>[,<string>=<string>]

Set output resolution. When it is different from the input resolution, HW/GPU resizer will be activated automatically.

If not specified, it will be same as the input resolution. (no resize)

• Special Values

  • 0 ... Will be same as input.
  • One of width or height as negative value
    Will be resized keeping aspect ratio, and a value which could be divided by the negative value will be chosen.

• parameters

  • preserve_aspect_ratio=<string>
    Resize to specified width or height, while preserving input aspect ratio.
    • increase ... preserve aspect ratio by increasing resolution.
    • decrease ... preserve aspect ratio by decreasing resolution.
  • ignore_sar=<bool>
    When auto resizing with negative value, ignore in/out SAR ratio in calculation. Default = off.

• Example

  When input is 1280x720...
  --output-res 1024x576 -> normal
  --output-res 960x0    -> resize to 960x720 (0 will be replaced to 720, same as input)
  --output-res 1920x-2  -> resize to 1920x1080 (calculated to keep aspect ratio)
  
  --output-res 1440x1440,preserve_aspect_ratio=increase -> resize to 2560x1440
  --output-res 1440x1440,preserve_aspect_ratio=decrease -> resize to 1440x810
  

--input-csp <string>

Set input colorspace for --raw input. Default is yv12.

  yv12, nv12, p010, yuv420p9le, yuv420p10le, yuv420p12le, yuv420p14le, yuv420p16le
  yuv422p, yuv422p9le, yuv422p10le, yuv422p12le, yuv422p14le, yuv422p16le
  yuv444p, yuv444p9le, yuv444p10le, yuv444p12le, yuv444p14le, yuv444p16le

Encode Mode Options

The default is QVBR (constant quality mode).

--qvbr <float>

Encode using constant quality mode. (0.0-51.0, 0 = automatic)

This is equivalent to --vbr 0 --vbr-quality <float>.

--cbr <int>

--vbr <int>

Set bitrate in kbps.

--cqp <int> or <int>:<int>:<int>

Set the QP value of <I frame>:<P frame>:<B frame>

Generally, it is recommended to set the QP value to be I < P < B.

Other Options for Encoder

-u, --preset

Encode quality preset. P1～P7 preset is available from API v10.0.

• default
• performance
• quality
• P1 (= performance)
• P2
• P3
• P4 (= default)
• P5
• P6
• P7 (= quality)

--output-depth <int>

Set output bit depth.

• 8 ... 8 bits (default)
• 10 ... 10 bits

--output-csp <string>

Set output colorspace.

• yuv420 (default)

• yuv444

• rgb

• yuva420

  :::note info There is no plan to add other colorspaces such as yuv422. :::

--multipass <string>

Multi pass mode. Available only for --vbr and --cbr. [API v10.0]

In 1-pass rate control modes, the encoder will estimate the required QP for the macroblock and immediately encode the macroblock.

In 2-pass rate control modes, NVENC estimates the complexity of the frame to be encoded and determines bit distribution across the frame in the first pass. In the second pass, NVENC encodes macroblocks in the frame using the distribution determined in the first pass. 2-pass rate control modes can distribute the bits more optimally within the frame and can reach closer to the target bitrate, especially for CBR encoding.

• none
  1pass mode. (fast)

• 2pass-quarter
  Runs first pass in quater resolution, which results in larger motion vectors being caught and fed as hints to second pass.

• 2pass-full
  Runs first pass in full resolution, slower but generating better statistics for the second pass.

--lossless [H.264/HEVC]

Perform lossless output. (Default: off)

--max-bitrate <int>

Maximum bitrate (in kbps).

--vbv-bufsize <int>

Set vbv buffer size (in kbps). (default: auto)

--qp-init <int> or <int>:<int>:<int>

Set the initial QP value with <I frame>:<P frame>:<B frame>. This option will be ignored in CQP mode.

These QP values will be applied at the beginning of encoding. Use this option when you want to adjust the image quality at the beginning of the movie, which sometimes gets unstable in CBR/VBR modes.

--qp-min <int> or <int>:<int>:<int>

Set the minimum QP value with <I frame>:<P frame>:<B frame>. This option will be ignored in CQP mode.

It could be used to suppress bitrate being used unnecessarily to a portion of movie with still image.

--qp-max <int> or <int>:<int>:<int>

Set the maximum QP value to <I frame>:<P frame>:<B frame>. This option will be ignored in CQP mode.

It could be used to maintain certain degree of image quality in any part of the video, even if doing so may exceed the specified bitrate.

--chroma-qp-offset <int> [H.264/HEVC]

Set the QP offset for chroma. (default: 0)

--vbr-quality <float>

Set target quality when using VBR mode. (0.0-51.0, 0 = automatic)

--dynamic-rc <int>:<int>:<int><int>,<param1>=<value1>[,<param2>=<value2>],...

Change the rate control mode and rate control params within the specified range of output frames.

• required parameters It is required to specify one of the params below.

  • cqp=<int> or cqp=<int>:<int>:<int>
  • cbr=<int>
  • vbr=<int>

• additional parameters

  • max-bitrate=<int>
  • vbr-quality=<float>
  • multipass=<string>

• Examples

  Example1: Encode by vbr(12000kbps) in output frame range 3000-3999,
            encode by constant quality mode(29.0) in output frame range 5000-5999,
            and encode by constant quality mode(25.0) on other frame range.
    --vbr 0 --vbr-quality=25.0 --dynamic-rc 3000:3999,vbr=12000 --dynamic-rc 5000:5999,vbr=0,vbr-quality=29.0
  
  Example2: Encode by vbr(6000kbps) to output frame number 2999,
            and encode by vbr(12000kbps) from output frame number 3000 and later.
    --vbr 6000 --dynamic-rc start=3000,vbr=12000
  

--lookahead <int>

Enable lookahead, and specify its target range by the number of frames. (0 - 32)
This is useful to improve image quality, allowing adaptive insertion of I and B frames.

--lookahead-level <int> [HEVC]

Set level of lookahead, higher level may improve quality at the expense of performance. (0 - 3, default = 0)

--no-i-adapt

Disable adaptive I frame insertion when lookahead is enabled.

--no-b-adapt

Disable adaptive B frame insertion when lookahead is enabled.

--strict-gop

Force fixed GOP length.

--gop-len <int>

Set maximum GOP length. When lookahead is off, this value will always be used. (Not variable, fixed GOP)

-b, --bframes <int>

Set the number of consecutive B frames.

--ref <int>

Set the reference distance (max=16).

--multiref-l0 <int> [H.264/HEVC]

--multiref-l1 <int> [H.264/HEVC]

Set max number of reference frames in reference picture list L0/L1 (max=7). Avaialble from API v9.1.

--weightp

Enable weighted P frames.

--nonrefp

enable automatic insertion of non-reference P-frames.

--aq

Enable adaptive quantization in frame (spatial). (Default: off)

--aq-temporal

Enable adaptive quantization between frames (temporal). (Default: off)

--aq-strength <int>

Specify the AQ strength. (1 (weak) - 15 (strong), 0 = auto)

--bref-mode <string>

Specify B frame reference mode.

• auto (default)
• disabled
• each ... use each B frames as references
• middle ... only (Number of B-frame)/2 th B-frame will be used for reference

--direct <string> [H.264]

Specify H.264 B Direct mode.

• auto (default)
• disabled
• spatial
• temporal

--(no-)adapt-transform [H.264]

Enable (or disable) adaptive transform mode of H.264.

--hierarchial-p [H.264]

Enable hierarchial P frames.

--hierarchial-b [H.264]

Enable hierarchial B frames.

--temporal-layers <int> [H.264]

Specifies number of temporal layers to be used for hierarchical coding.

--mv-precision <string>

Motion vector accuracy / default: auto

• auto ... automatic
• Q-pel ... 1/4 pixel accuracy (high precision)
• half-pel ... 1/2 pixel precision
• full-pel ... 1 pixel accuracy (low accuracy)

--slices <int> [H.264/HEVC]

Set number of slices.

--cabac [H.264]

Use CABAC. (Default: on)

--cavlc [H.264]

Use CAVLC. (Default: off)

--bluray [H.264]

Perform output for Bluray. (Default: off)

--(no-)deblock [H.264]

Enable deblock filter. (Default: on)

--cu-max <int> [HEVC]

--cu-min <int> [HEVC]

Specify the maximum and minimum size of CU respectively. 8, 16, 32 can be specified. Since it is known that image quality may be degraded when this option is used, it is recommended not to use these options.

--alpha-bitrate-ratio <int> [HEVC]

Set bitrate ratio for alpha channel which can be used with --output-csp yuva420. Default value is 0 (for "auto").

When the value is set to "x", then approximately "1 / (x+1)" of the bitrate will be used for alpha channel. Therefore, smaller value will result more bitrate to be spent for alpha layer.

--alpha-channel-mode <string> [HEVC]

Set alpha channel mode. (default: straight)

• straight
• premultiplied

--tf-level <int> [HEVC]

Set HEVC temporal filtering, requires bframes >= 4. (Default: 0)

  0, 4

--part-size-min <int> [AV1]

Specifies the minimum size of luma coding block partition. (default: 0 = auto)

  0 (auto), 4, 8, 16, 32, 64

--part-size-max <int> [AV1]

Specifies the maximum size of luma coding block partition. (default: 0 = auto)

  0 (auto), 4, 8, 16, 32, 64

--tile-columns <int> [AV1]

Set number of tile columns. (default: 0 = auto)

  0 (auto), 1, 2, 4, 8, 16, 32, 64

--tile-rows <int> [AV1]

Set number of tile rows. (default: 0 = auto)

  0 (auto), 1, 2, 4, 8, 16, 32, 64

--max-temporal-layers <int> [AV1]

Specifies the max temporal layer used for hierarchical coding.

--refs-forward <int> [AV1]

Specifies max number of forward reference frame used for prediction of a frame. (default: 0 = auto)

It must be in range 1-4 (Last, Last2, last3 and Golden). It's a suggestive value not necessarily be honored always.

--refs-backward <int> [AV1]

pecifies max number of L1 list reference frame used for prediction of a frame. (default: 0 = auto)

It must be in range 1-3 (Backward, Altref2, Altref). It's a suggestive value not necessarily be honored always.

--level <string>

Specify the Level of the codec to be encoded. If not specified, it will be automatically set.

h264: auto, 1, 1 b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, 5.1, 5.2
hevc: auto, 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6, 6.1, 6.2
av1 :  auto

--profile <string>

Specify the profile of the codec to be encoded. If not specified, it will be automatically set.

h264:  auto, baseline, main, high, high444
hevc:  auto, main, main10, main444
av1 :  auto, main, high

--tier <string>

Specify the tier of the codec.

hevc:  main, high
av1 :  0, 1

--sar <int>:<int>

Set SAR ratio (pixel aspect ratio).

--dar <int>:<int>

Set DAR ratio (screen aspect ratio).

--colorrange <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  limited, full, auto

--videoformat <string>

  undef, ntsc, component, pal, secam, mac

--colormatrix <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470bg, smpte240m, YCgCo, fcc, GBR, bt2020nc, bt2020c

--colorprim <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, film, bt2020

--transfer <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
  log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
  bt2020-10, bt2020-12, smpte2084, smpte428, arib-std-b67

--chromaloc <int> or "auto"

Set chroma location flag of the output bitstream from values 0 ... 5.
"auto" will copy from input file (available when using avhw/avsw reader) default: 0 = unspecified

--max-cll <int>,<int> or "copy" [HEVC, AV1]

Set MaxCLL and MaxFall in nits. "copy" will copy values from the input file. (available when using avhw/avsw reader)

Please note that this option will implicitly activate --repeat-headers.

Example1: --max-cll 1000,300
Example2: --max-cll copy  # copy values from source

--master-display <string> or "copy" [HEVC, AV1]

Set Mastering display data. "copy" will copy values from the input file. (available when using avhw/avsw reader)

Please note that this option will implicitly activate --repeat-headers.

Example1: --master-display G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)
Example2: --master-display copy  # copy values from source

--atc-sei <string> or <int> [HEVC only]

Set alternative transfer characteristics SEI from below or by integer, Required for HLG (Hybrid Log Gamma) signaling.

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
  log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
  bt2020-10, bt2020-12, smpte2084, smpte428, arib-std-b67

--dhdr10-info <string> [HEVC, AV1]

Apply HDR10+ dynamic metadata from specified json file. Requires hdr10plus_gen.exe module additionally.

--dhdr10-info copy [HEVC, AV1]

Copy HDR10+ dynamic metadata from input file.
Limitations for avhw reader: this option uses timestamps to reorder frames to decoded order to presentation order. Therefore, input files without timestamps (such as raw ES), are not supported. Please try for avsw reader for that case.

--dolby-vision-profile <string> [HEVC, AV1]

Output file which is specified in Dolby Vision profile. Recommended to be used with --dolby-vision-rpu.

"copy" will use dolby vision profile from input file (available when using avhw/avsw reader).

unset, copy, 5.0, 8.1, 8.2, 8.4

--dolby-vision-rpu <string> [HEVC, AV1]

Interleave Dolby Vision RPU metadata from the specified file into the output file. Recommended to be used with --dolby-vision-profile.

--dolby-vision-rpu copy [HEVC, AV1]

Interleave Dolby Vision RPU metadata copied from HEVC input file. Recommended to be used with --dolby-vision-profile.

Limitations for avhw reader: this option uses timestamps to reorder frames to decoded order to presentation order. Therefore, input files without timestamps (such as raw ES), are not supported. Please try for avsw reader for that case.

--dolby-vision-rpu-prm <param1>=<value1>[,<param2>=<value2>]...

Set parameters for --dolby-vision-rpu.

• parameters

  • crop=<bool>

    Set active area offsets to 0 (no letterbox bars).

• Examples

  Example:  --dolby-vision-rpu-prm crop=true
  

--aud [H.264/HEVC]

Insert Access Unit Delimiter NAL.

--repeat-headers

Output VPS, SPS and PPS for every IDR frame.

--pic-struct [H.264/HEVC]

Insert picture timing SEI.

--split-enc <string>

• Parameters

  • auto
    Split frame forced mode disabled, split frame auto mode enabled.

  • auto_forced
    Split frame forced mode enabled with number of strips automatically selected by driver to best fit configuration.

  • forced_2
    Forced 2-strip split frame encoding (if NVENC number > 1, 1-strip encode otherwise).

  • forced_3
    Forced 3-strip split frame encoding (if NVENC number > 2, NVENC number of strips otherwise).

  • disable
    Both split frame auto mode and forced mode are disabled.

--ssim

Calculate ssim of the encoded video.

--psnr

Calculate psnr of the encoded video.

--vmaf [<param1>=<value1>][,<param2>=<value2>],...

Calculate vmaf score of the encoded video. Please note that the vmaf score calculation is run by libvmaf on CPU, and is highly likely to become a bottleneck and result in poor encoding performance.

Currently for Windows x64 only.

• Parameters

  • model=<string>
    Set internal model version of libvmaf, or external model file path. Default is internal "vmaf_v0.6.1".

    When using model file, download json format model files from
    link and set the path by this option.

  • threads=<int> (default: 0)
    CPU thread(s) to calculate vmaf score. Default is to use all physical cores.

  • subsample=<int> (default: 1)
    Interval for frame subsampling calculating vmaf score.

  • phone_model=<bool> (default: false)
    Use phone model which generate higher vmaf score.

  • enable_transform=<bool> (default: false)
    Enable transform when calculating vmaf score.

• Examples

  Example: --vmaf model=vmaf_v0.6.1.json
  

IO / Audio / Subtitle Options

--input-analyze <float>

Specify the length in seconds that libav parses for file analysis. The default is 5 (sec). If audio / subtitle tracks etc. are not detected properly, try increasing this value (eg 60).

--input-probesize <int>

Set the maximum size in bytes that libav parses for file analysis.

--trim <int>:<int>[,<int>:<int>][,<int>:<int>]...

Encode only frames in the specified range.

• Examples

  Example 1: --trim 0:1000,2000:3000    (encode from frame #0 to #1000 and from frame #2000 to #3000)
  Example 2: --trim 2000:0              (encode from frame #2000 to the end)
  

--seek [<int>:][<int>:]<int>[.<int>]

The format is hh:mm:ss.ms. "hh" or "mm" could be omitted. The transcode will start from the time specified.

Seeking by this option is not exact but fast, compared to --trim. If you require exact seek, use --trim.

• Examples

  Example 1: --seek 0:01:15.400
  Example 2: --seek 1:15.4
  Example 3: --seek 75.4
  

--seekto [<int>:][<int>:]<int>[.<int>]

The format is hh:mm:ss.ms. "hh" or "mm" could be omitted.

Set encode finish time. This might be inaccurate, so if you require exact number of frames to encode, use --trim.

• Examples

  Example 1: --seekto 0:01:15.400
  Example 2: --seekto 1:15.4
  Example 3: --seekto 75.4
  

--input-format <string>

Specify input format for avhw / avsw reader.

-f, --output-format <string>

• For normal encode

  Specify output format for muxer.

  Since the output format is automatically determined by the output extension, it is usually not necessary to specify it, but you can force the output format with this option.

  Available formats can be checked with --check-formats. To output H.264 / HEVC as an Elementary Stream, specify "raw".

• For raw output (Used with -c raw)

  Specify output format for raw frame.

  • Parameters
    • y4m (default)
    • raw

--video-track <int>

Set video track to encode by resolution. Will be active when used with avhw/avsw reader.

• 1 (default) highest resolution video track
• 2 next high resolution video track ...
• -1 lowest resolution video track
• -2 next low resolution video track ...

--video-streamid <int>

Set video track to encode in stream id.

--video-tag <string>

Specify video tag.

• Examples

   -o test.mp4 -c hevc --video-tag hvc1
  

--video-metadata <string> or <string>=<string>

Set metadata for video track.

• copy ... copy metadata from input if possible

• clear ... do not copy metadata (default)

• Examples

  Example1: copy metadata from input file
  --video-metadata 1?copy
  
  Example2: clear metadata from input file
  --video-metadata 1?clear
  
  Example3: set metadata
  --video-metadata 1?title="video title" --video-metadata 1?language=jpn
  

--audio-copy [<int/string>;[,<int/string>]...]

Copy audio track into output file. Available only when avhw / avsw reader is used.

If it does not work well, try encoding with --audio-codec, which is more stable.

You can also specify the audio track (1, 2, ...) to extract with [<int>], or select audio track to copy by language with [<string>].

• Examples

  Example: Copy all audio tracks
  --audio-copy
  
  Example: Extract track numbers #1 and #2
  --audio-copy 1,2
  
  Example: Extract audio tracks marked as English and Japanese
  --audio-copy eng,jpn
  

--audio-codec [[<int/string>?]<string>[:<string>=<string>[,<string>=<string>]...]...]

Encode audio track with the codec specified. If codec is not set, most suitable codec will be selected automatically. Codecs available could be checked with --check-encoders.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

Also, after ":" you can specify params for audio encoder, after "#" you can specify params for audio decoder.

• Examples

  Example 1: encode all audio tracks to mp3
  --audio-codec libmp3lame
  
  Example 2: encode the 2nd track of audio to aac
  --audio-codec 2?aac
  
  Example 3: encode the English audio track to aac
  --audio-codec eng?aac
  
  Example 4: encode the English audio track and Japanese audio track to aac
  --audio-codec eng?aac --audio-codec jpn?aac
  
  Example 5: set param "aac_coder" to "twoloop" which will improve quality at low bitrate for aac encoder
  --audio-codec aac:aac_coder=twoloop
  

--audio-bitrate [<int/string>?]<int>

Specify the bitrate in kbps when encoding audio.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

Example 1: --audio-bitrate 192 (set bitrate of audio track to 192 kbps)
Example 2: --audio-bitrate 2?256 (set bitrate of 2nd audio track to to 256 kbps)

--audio-quality [<int/string>?]<int>

Specify the quality when encoding audio. The value depends on the codec used.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-profile [<int/string>?]<string>

Specify audio codec profile when encoding audio.You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-stream [<int/string>?]{<string1>}[:<string2>]

Separate or merge audio channels. Audio tracks specified with this option will always be encoded. (no copying available)

By comma(",") separation, you can generate multiple tracks from the same input track.

• format

  Specify the track to be processed by <int>.

  Specify the channel to be used as input by <string1>. If omitted, input will be all the input channels.

  Specify the output channel format by <string2>. If omitted, all the channels of <string1> will be used.

• Examples

  Example 1: --audio-stream FR,FL
  Separate left and right channels of "dual mono" audio track, into two mono audio tracks.
  
  Example 2: --audio-stream :stereo
  Convert any audio track to stereo.
  
  Example 3: --audio-stream 2?5.1,5.1:stereo
  While encoding the 2nd 5.1 ch audio track of the input file as 5.1 ch,
  another stereo downmixed audio track will be generated
  from the same source audio track.
  

• Available symbols

  mono       = FC
  stereo     = FL + FR
  2.1        = FL + FR + LFE
  3.0        = FL + FR + FC
  3.0(back)  = FL + FR + BC
  3.1        = FL + FR + FC + LFE
  4.0        = FL + FR
  4.0        = FL + FR + FC + BC
  quad       = FL + FR + BL + BR
  quad(side) = FL + FR + SL + SR
  5.0        = FL + FR + FC + SL + SR
  5.1        = FL + FR + FC + LFE + SL + SR
  6.0        = FL + FR + FC + BC + SL + SR
  6.0(front) = FL + FR + FLC + FRC + SL + SR
  hexagonal  = FL + FR + FC + BL + BR + BC
  6.1        = FL + FR + FC + LFE + BC + SL + SR
  6.1(front) = FL + FR + LFE + FLC + FRC + SL + SR
  7.0        = FL + FR + FC + BL + BR + SL + SR
  7.0(front) = FL + FR + FC + FLC + FRC + SL + SR
  7.1        = FL + FR + FC + LFE + BL + BR + SL + SR
  7.1(wide)  = FL + FR + FC + LFE + FLC + FRC + SL + SR
  

--audio-samplerate [<int/string>?]<int>

Specify the sampling frequency of the sound in Hz. You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string&gt].

• Examples

  Example 1: --audio-bitrate 44100 (converting sound to 44100 Hz)
  Example 2: --audio-bitrate 2?22050 (Convert the second track of voice to 22050 Hz)
  

--audio-resampler <string>

Specify the engine used for mixing audio channels and sampling frequency conversion.

• swr ... swresampler (default)
• soxr ... sox resampler (libsoxr)

--audio-delay [<int/string>?]<float>

Specify audio delay in milli seconds.　You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-file [<int/string>?][<string>]<string>

Extract audio track to the specified path. The output format is determined automatically from the output extension. Available only when avhw / avsw reader is used.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string&gt].

• Examples

  Example: extract audio track number #2 to test_out2.aac
  --audio-file 2?"test_out2.aac"
  

[<string>] allows you to specify the output format.

• Examples

  Example: Output in adts format without extension
  --audio-file 2?adts:"test_out2"  
  

--audio-filter [<int/string>?]<string>

Apply filters to audio track. Filters could be slected from link.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

• Examples

  Example 1: --audio-filter volume=0.2  (lowering the volume)
  Example 2: --audio-filter 2?volume=-4dB (lowering the volume of the 2nd track)
  

--audio-disposition [<int/string>?]<string>[,<string>][]...

set disposition for the specified audio track. You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

• list of dispositions

  default
  dub
  original
  comment
  lyrics
  karaoke
  forced
  hearing_impaired
  visual_impaired
  clean_effects
  attached_pic
  captions
  descriptions
  dependent
  metadata
  copy
  

• Examples

  Example:
  --audio-disposition 2?default,forced
  

--audio-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>

Set metadata for audio track.

• copy ... copy metadata from input if possible (default)
• clear ... do not copy metadata

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

• Examples

  Example1: copy metadata from input file
  --audio-metadata 1?copy
  
  Example2: clear metadata from input file
  --audio-metadata 1?clear
  
  Example3: set metadata
  --audio-metadata 1?title="audio title" --audio-metadata 1?language=jpn
  

--audio-bsf [<int/string>?]<string>

Apply bitstream filter to audio track.

--audio-ignore-decode-error <int>

Ignore the consecutive audio decode error, and continue transcoding within the threshold specified. The portion of audio which could not be decoded properly will be replaced with silence.

The default is 10.

• Examples

  Example1: Quit transcoding for a 5 consecutive audio decode error.
  --audio-ignore-decode-error 5
  
  Example2: Quit transcoding for a single audio decode error.
  --audio-ignore-decode-error 0
  

--audio-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]

Mux an external audio file specified.

• file params

  • format=<string>
    Specify input format for the file.

  • input_opt=<string>
    Specify input options for the file.

• track params

  • copy
    Copy audio track.

  • codec=<string>
    Encode audio to specified audio codec.

  • profile=<string>
    Specify audio codec profile when encoding audio.

  • bitrate=<int>
    Specify audio bitrate in kbps.

  • samplerate=<int>
    Specify audio sampling rate.

  • delay=<int>
    Set audio delay in milli seconds.

  • dec_prm=<string>
    Specify params for audio decoder.

  • enc_prm=<string>
    Specify params for audio encoder.

  • filter=<string>
    Specify filters for audio.

  • disposition=<string>
    Specify disposition for audio.

  • metadata=<string1>=<string2>
    Specify metadata for audio track.

  • bsf=<string>
    Specify bitstream filter for audio track.

• Examples

  Example1: --audio-source "<audio_file>:copy"
  Example2: --audio-source "<audio_file>:codec=aac"
  Example3: --audio-source "<audio_file>:1?codec=aac;bitrate=256/2?codec=aac;bitrate=192;metadata=language=jpn;disposition=default,forced"
  Example4: --audio-source "hw:1:format=alsa/codec=aac;bitrate=256"
  

--chapter <string>

Set chapter in the (separate) chapter file. The chapter file could be in nero format, apple format or matroska format. Cannot be used with --chapter-copy.

• nero format

  CHAPTER01=00:00:39.706
  CHAPTER01NAME=chapter-1
  CHAPTER02=00:01:09.703
  CHAPTER02NAME=chapter-2
  CHAPTER03=00:01:28.288
  CHAPTER03NAME=chapter-3
  

• apple format (should be in utf-8)

  <?xml version="1.0" encoding="UTF-8" ?>
    <TextStream version="1.1">
     <TextStreamHeader>
      <TextSampleDescription>
      </TextSampleDescription>
    </TextStreamHeader>
    <TextSample sampleTime="00:00:39.706">chapter-1</TextSample>
    <TextSample sampleTime="00:01:09.703">chapter-2</TextSample>
    <TextSample sampleTime="00:01:28.288">chapter-3</TextSample>
    <TextSample sampleTime="00:01:28.289" text="" />
  </TextStream>
  

• matroska format (hould be in utf-8)
  Other Samples>>

  <?xml version="1.0" encoding="UTF-8"?>
  <Chapters>
    <EditionEntry>
      <ChapterAtom>
        <ChapterTimeStart>00:00:00.000</ChapterTimeStart>
        <ChapterDisplay>
          <ChapterString>chapter-0</ChapterString>
        </ChapterDisplay>
      </ChapterAtom>
      <ChapterAtom>
        <ChapterTimeStart>00:00:39.706</ChapterTimeStart>
        <ChapterDisplay>
          <ChapterString>chapter-1</ChapterString>
        </ChapterDisplay>
      </ChapterAtom>
      <ChapterAtom>
        <ChapterTimeStart>00:01:09.703</ChapterTimeStart>
        <ChapterDisplay>
          <ChapterString>chapter-2</ChapterString>
        </ChapterDisplay>
      </ChapterAtom>
      <ChapterAtom>
        <ChapterTimeStart>00:01:28.288</ChapterTimeStart>
        <ChapterTimeEnd>00:01:28.289</ChapterTimeEnd>
        <ChapterDisplay>
          <ChapterString>chapter-3</ChapterString>
        </ChapterDisplay>
      </ChapterAtom>
    </EditionEntry>
  </Chapters>
  

--chapter-copy

Copy chapters from input file.

--chapter-no-trim

Do not apply --trim when reading chapters.

--key-on-chapter

Set keyframes on chapter position.

--keyfile <string>

Set keyframes on frames (starting from 0, 1, 2, ...) specified in the file. There should be one frame ID per line.

--sub-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]

Read subtitle from the specified file and mux into the output file.

• file params

  • format=<string>
    Specify input format for the file.

  • input_opt=<string>
    Specify input options for the file.

• track params

  • disposition=<string>
    Specify disposition for subtitle.

  • metadata=<string1>=<string2>
    Specify metadata for subtitle track.

  • bsf=<string>
    Specify bitstream filter for subtitle track.

• Examples

  Example1: --sub-source "<sub_file>"
  Example2: --sub-source "<sub_file>:disposition=default,forced;metadata=language=jpn"
  

--sub-copy [<int/string>;[,<int/string>]...]

Copy subtitle tracks from input file. Available only when avhw / avsw reader is used. It is also possible to specify subtitle tracks (1, 2, ...) to extract with [<int>], or select subtitle tracks to copy by language with [<string>].

Supported subtitles are PGS / srt / txt / ttxt.

• Examples

  Example: Copy all subtitle tracks
  --sub-copy
  
  Example: Copy subtitle track #1 and #2
  --sub-copy 1,2
  
  Example: Copy subtitle tracks marked as English and Japanese
  --sub-copy eng,jpn
  

--sub-disposition [<int/string>?]<string>

set disposition for the specified subtitle track.

• list of dispositions

   default
   dub
   original
   comment
   lyrics
   karaoke
   forced
   hearing_impaired
   visual_impaired
   clean_effects
   attached_pic
   captions
   descriptions
   dependent
   metadata
   copy
  

--sub-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>

Set metadata for subtitle track.

• copy ... copy metadata from input if possible (default)

• clear ... do not copy metadata

• Examples

  Example1: copy metadata from input file
  --sub-metadata 1?copy
  
  Example2: clear metadata from input file
  --sub-metadata 1?clear
  
  Example3: set metadata
  --sub-metadata 1?title="subtitle title" --sub-metadata 1?language=jpn
  

--sub-bsf [<int/string>?]<string>

Apply bitstream filter to subtitle track.

--data-copy [<int>[,<int>]...]

Copy data stream from input file. Available only when avhw / avsw reader is used.

--attachment-copy [<int>[,<int>]...]

Copy attachment stream from input file. Available only when avhw / avsw reader is used.

--attachment-source <string>[:{<int>?}[;<param1>=<value1>]...]...

Read attachment from the specified file and mux into the output file.

• params

  • metadata=<string1>=<string2>
    Specify metadata for the attachment, setting mimetype is required.

• Examples

  Example1: --attachment-source <png_file>:metadata=mimetype=image/png
  Example2: --attachment-source <font_file>:metadata=mimetype=application/x-truetype-font
  

--input-option <string1>:<string2>

Pass optional parameters for input for avhw/avsw reader. Specify the option name in <string1>, and the option value in <string2>.

• Examples

  Example: Reading playlist 1 of bluray 
  -i bluray:D:\ --input-option playlist:1
  

-m, --mux-option <string1>:<string2>

Pass optional parameters to muxer. Specify the option name in <string>, and the option value in <string2>.

• Examples

  Example: Output for HLS
  -i <input> -o test.m3u8 -f hls -m hls_time:5 -m hls_segment_filename:test_%03d.ts --gop-len 30
  
  Example: Pass through "default" disposition even if there are no "default" tracks in the output (mkv only)
  -m default_mode:infer_no_subs
  

--metadata <string> or <string>=<string>

Set global metadata for output file.

• copy ... copy metadata from input if possible (default)

• clear ... do not copy metadata

• Examples

  Example1: copy metadata from input file
  --metadata copy
  
  Example2: clear metadata from input file
  --metadata clear
  
  Example3: set metadata
  --metadata title="video title" --metadata language=jpn
  

--avsync <string>

• auto (default)

• forcecfr Check pts from the input file, and duplicate or remove frames if required to keep CFR, so that synchronization with the audio could be maintained. Please note that this could not be used with --trim.

• vfr
  Honor source timestamp and enable vfr output. Only available for avsw/avhw reader, and could not be used with --trim.

--timecode [<string>]

Write timecode file to the specified path. If the path is not set, it will be written to "<output file path>.timecode.txt".

--tcfile-in <string>

Read timecode file for input frames, can be used with readers except avhw.

--timebase <int>/<int>

Set timebase for transcoding and timecode file.

--input-hevc-bsf <string>

switch hevc bitstream filter used for hw decoder input. (for debug purpose)

• Parameters

  • internal
    use internal implementation. (default)

  • libavcodec
    use hevc_mp4toannexb bitstream filter.

--allow-other-negative-pts

Allow negative timestamps for audio, subtitles. Intended for debug purpose only.

Vpp Options

These options will apply filters before encoding.

Vpp Filtering order

Vpp filters will be applied in fixed order, regardless of the order in the commandline.

• --vpp-deinterlace
• --vpp-colorspace
• --vpp-libplacebo-tonemapping
• --vpp-rff
• --vpp-delogo
• --vpp-afs
• --vpp-nnedi
• --vpp-yadif
• --vpp-decomb
• --vpp-decimate
• --vpp-mpdecimate
• --vpp-select-every
• --vpp-transform/rotate
• --vpp-convolution3d
• --vpp-nvvfx-denoise
• --vpp-nvvfx-artifact-reduction
• --vpp-smooth
• --vpp-denoise-dct
• --vpp-fft3d
• --vpp-knn
• --vpp-nlmeans
• --vpp-pmd
• --vpp-gauss
• --vpp-subburn
• --vpp-libplacebo-shader
• --vpp-resize
• --vpp-unsharp
• --vpp-edgelevel
• --vpp-warpsharp
• --vpp-curves
• --vpp-tweak
• --vpp-deband
• --vpp-libplacebo-deband
• --vpp-padding
• --vpp-overlay
• --vpp-ngx-truehdr
• --vpp-fruc

--vpp-colorspace [<param1>=<value1>][,<param2>=<value2>],...

Converts colorspace of the video. Available on x64 version.
Values for parameters will be copied from input file for "input" when using avhw/avsw reader.

• parameters

  • matrix=<from>:<to>

    bt709, smpte170m, bt470bg, smpte240m, YCgCo, fcc, GBR, bt2020nc, bt2020c, auto
  

  • colorprim=<from>:<to>

    bt709, smpte170m, bt470m, bt470bg, smpte240m, film, bt2020, auto
  

  • transfer=<from>:<to>

    bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
    log100, log316, iec61966-2-4, iec61966-2-1,
    bt2020-10, bt2020-12, smpte2084, arib-std-b67, auto
  

  • range=<from>:<to>

    limited, full, auto
  

  • lut3d=<string>
    Apply a 3D LUT to an input video. Curretly supports .cube file only.

  • lut3d_interp=<string>

    nearest, trilinear, tetrahedral, pyramid, prism
    

  • hdr2sdr=<string>
    Enables HDR10 to SDR by selected tone-mapping.

    • none (default)
      hdr2sdr processing is disabled.

    • hable
      Trys to preserve both bright and dark detailes, but with rather dark result. You may specify addtional params (a,b,c,d,e,f) for the hable tone-mapping function below.

      hable(x) = ( (x * (ax + cb) + de) / (x * (ax + b) + d*f) ) - e/f
      output = hable( input ) / hable( (source_peak / ldr_nits) )

      defaults: a = 0.22, b = 0.3, c = 0.1, d = 0.2, e = 0.01, f = 0.3

    • mobius
      Trys to preserve contrast and colors while bright details might be removed.

      • transition=<float> (default: 0.3)
        Threshold to move from linear conversion to mobius tone mapping.
      • peak=<float> (default: 1.0)
        reference peak brightness

    • reinhard

      • contrast=<float> (default: 0.5)
        local contrast coefficient
      • peak=<float> (default: 1.0)
        reference peak brightness

    • bt2390
      Perceptual tone mapping curve (EETF) specified in BT.2390.

  • source_peak=<float> (default: 1000.0)

  • ldr_nits=<float> (default: 100.0)
    Target brightness for hdr2sdr function.

  • desat_base=<float> (default: 0.18)
    Offset for desaturation curve used in hdr2sr.

  • desat_strength=<float> (default: 0.75)
    Strength of desaturation curve used in hdr2sr. 0.0 will disable the desaturation, 1.0 will make overly bright colors will tend towards white.

  • desat_exp=<float> (default: 1.5)
    Exponent of the desaturation curve used in hdr2sr. This controls the brightness of which desaturated is going to start. Lower value will make the desaturation to start earlier.

• Examples

  example1: convert from BT.601 -> BT.709
  --vpp-colorspace matrix=smpte170m:bt709
  
  example2: using hdr2sdr (hable tone-mapping)
  --vpp-colorspace hdr2sdr=hable,source_peak=1000.0,ldr_nits=100.0
  
  example3: using hdr2sdr (hable tone-mapping) and setting the coefs (this is example for the default settings)
  --vpp-colorspace hdr2sdr=hable,source_peak=1000.0,ldr_nits=100.0,a=0.22,b=0.3,c=0.1,d=0.2,e=0.01,f=0.3
  
  example4: using lut3d
  --vpp-colorspace lut3d="example.cube",lut3d_interp=trilinear
  

--vpp-libplacebo-tonemapping [<param1>=<value1>][,<param2>=<value2>],...

Performs tone mapping using libplacebo.

• Parameters

  • src_csp=<string>
    Input color space.

    auto, sdr, hdr10, hlg, dovi, rgb
    

  • dst_csp=<string>
    Output color space.

    auto, sdr, hdr10, hlg, dovi, rgb
    

  • src_max=<float>
    Input maximum luminance (nits). (Default: auto, tries to get info from input file if possible, otherwise 1000.0 (HDR) / 203.0 (SDR))

  • src_min=<float>
    Input minimum luminance (nits). (Default: auto, tries to get info from input file if possible, otherwise 0.005 (HDR) / 0.2023 (SDR))

  • dst_max=<float>
    Output maximum luminance (nits). (Default: auto, tries to get info from parameters if possible, otherwise 1000.0 (HDR) / 203.0 (SDR))

  • dst_min=<float>
    Output minimum luminance (nits). (Default: auto, tries to get info from parameters if possible, otherwise 0.005 (HDR) / 0.2023 (SDR))

  • dynamic_peak_detection=<bool>
    Enables computation of signal stats to optimize HDR tone mapping quality. Default: true

  • smooth_period=<float>
    Smoothing coefficient for detected values. Default: 20.0

  • scene_threshold_low=<float>
    Lower threshold for scene change detection (dB). Default: 1.0

  • scene_threshold_high=<float>
    Upper threshold for scene change detection (dB). Default: 3.0

  • percentile=<float>
    Percentile to consider for luminance histogram. Default: 99.995

  • black_cutoff=<float>
    Black level cutoff intensity (PQ%). Default: 1.0

  • gamut_mapping=<string>
    Gamut mapping mode. (Default: perceptual)

    clip, perceptual, softclip, relative, saturation, absolute, desaturate, darken, highlight, linear
    

  • tonemapping_function=<string>
    Tone mapping function. (Default: bt2390)

    clip, st2094-40, st2094-10, bt2390, bt2446a, spline, reinhard, mobius, hable, gamma, linear, linearlight
    

  • for tonemapping_function=st2094-40, st2094-10, spline

    • knee_adaptation=<float> (float, 0.0 - 1.0, default: 0.4)
      Configures the knee point as a ratio between the source and target average brightness in PQ space.

      • 1.0: Always adapts source scene average to scaled target average
      • 0.0: Never modifies scene brightness

    • knee_min=<float> (0.0 - 0.5, default: 0.1)
      Minimum knee point in ratio of PQ luminance range.

    • knee_max=<float> (0.5 - 1.0, default: 0.8)
      Maximum knee point in ratio of PQ luminance range.

    • knee_default=<float> (knee_min - knee_max, default: 0.4)
      Default knee point used when source scene average metadata is unavailable.

  • for tonemapping_function=bt2390

    • knee_offset=<float> (0.5 - 2.0, default: 1.0)
      Knee point offset.

  • for tonemapping_function=spline

    • slope_tuning=<float> (0.0 - 10.0, default: 1.5)
      Coefficient for the slope of the spline curve.

    • slope_offset=<float> (0.0 - 1.0, default: 0.2)
      Slope offset of the spline curve.

    • spline_contrast=<float> (0.0 - 1.5, default: 0.5)
      Contrast for the spline function. Higher values preserve midtones but may lose shadow/highlight details.

  • for tonemapping_function=reinhard

    • reinhard_contrast=<float> (0.0 - 1.0, default: 0.5)
      contrast coefficient at display peak for the reinhard function.

  • for tonemapping_function=mobius, gamma

    • linear_knee=<float> (0.0 - 1.0, default: 0.3)

  • for tonemapping_function=linear, linearlight

    • exposure=<float> (0.0 - 10.0, default: 1.0)
      Linear exposure/gain applied.

  • metadata=<int>
    Data source to use for tone mapping.

    any, none, hdr10, hdr10plus, cie_y
    

  • contrast_recovery=<float>
    Contrast recovery strength. Default: 0.3

  • contrast_smoothness=<float>
    Contrast recovery lowpass kernel size. Default: 3.5

  • visualize_lut=<bool>
    Visualize tone mapping curve/LUT. Default: false

  • show_clipping=<bool>
    Graphically highlight hard-clipped pixels. Default: false

  • use_dovi=<bool>
    Whether to use Dolby Vision RPU as ST2086 metadata. Default: auto (enabled when tone mapping from Dolby Vision)

  • dst_pl_transfer=<string>
    Output transfer function. Must be used with dst_pl_colorprim.

    unknown, srgb, bt1886, linear, gamma18, gamma20, gamma22, gamma24, gamma26, gamma28,
    prophoto, st428, pq, hlg, vlog, slog1, slog2
    

  • dst_pl_colorprim=<string>
    Output color primaries. Must be used with dst_pl_transfer.

    unknown, bt601_525, bt601_625, bt709, bt470m, ebu_3213, bt2020, apple, adobe,
    prophoto, cie_1931, dci_p3, display_p3, v_gamut, s_gamut, film_c, aces_ap0, aces_ap1
    

• Examples

  Example: Dolby Vision to SDR tone mapping
  --vpp-libplacebo-tonemapping src_csp=dovi,dst_csp=sdr
  

--vpp-libplacebo-tonemapping-lut <string>

lut file path used in --vpp-libplacebo-tonemapping.

--vpp-delogo <string>[,<param1>=<value1>][,<param2>=<value2>],...

Specify the logo file and settings for the logo to be eliminated. The logo file supports ". lgd", ". ldp", and ". ldp2" formats.

• Parameters

  • select=<string>
    For logo pack, specify the logo to use with one of the following.

    • Logo name

    • Index (1, 2, ...)

    • Automatic selection ini file

       [LOGO_AUTO_SELECT]
       logo<num>=<pattern>,<logo name>
      

      Example:

      [LOGO_AUTO_SELECT]
      logo1= (NHK-G).,NHK総合 1440x1080
      logo2= (NHK-E).,NHK-E 1440x1080
      logo3= (MX).,TOKYO MX 1 1440x1080
      logo4= (CTC).,チバテレビ 1440x1080
      logo5= (NTV).,日本テレビ 1440x1080
      logo6= (TBS).,TBS 1440x1088
      logo7= (TX).,TV東京 50th 1440x1080
      logo8= (CX).,フジテレビ 1440x1088
      logo9= (BSP).,NHK BSP v3 1920x1080
      logo10= (BS4).,BS日テレ 1920x1080
      logo11= (BSA).,BS朝日 1920x1080
      logo12= (BS-TBS).,BS-TBS 1920x1080
      logo13= (BSJ).,BS Japan 1920x1080
      logo14= (BS11).,BS11 1920x1080 v3

  • pos <int>:<int> Adjustment of logo position with 1/4 pixel accuracy in x:y direction.

  • depth <int> Adjustment of logo transparency. Default 128.

  • y=<int>

  • cb=<int>

  • cr=<int>
    Adjustment of each color component of the logo.

  • auto_fade=<bool>
    Adjust fade value dynamically. default=false.

  • auto_nr=<bool>
    Adjust strength of noise reduction dynamically. default=false.

  • nr_area=<int>
    Area of noise reduction near logo. (default=0 (off), 0 - 3)

  • nr_value=<int>
    Strength of noise reduction near logo. (default=0 (off), 0 - 4)

  • log=<bool>
    log the offset of the fade value when using auto_fade and auto_nr.

• Examples

  example:
  --vpp-delogo logodata.ldp2,select=delogo.auf.ini,auto_fade=true,auto_nr=true,nr_value=3,nr_area=1,log=true
  

--vpp-rff

Reflect the Repeat Field Flag. The avsync error caused by rff could be solved. Available only when --avhw or --avsw is used.

rff of 2 or more will not be supported (only supports rff = 1). Also, it can not be used with --trim, --vpp-deinterlace.

--vpp-deinterlace <string>

Activate hw deinterlacer. Available only when used with --avhw(hw decode) and --interlace tff or --interlace bff is specified.

• none ... no deinterlace (default)
• normal ... standard 60i → 30p interleave cancellation.
• adaptive ... same as normal
• bob ... 60i → 60p interleaved.

for IT(inverse telecine), use --vpp-afs.

--vpp-afs [<param1>=<value1>][,<param2>=<value2>],...

Activate Auto Field Shift (AFS) deinterlacer.

• parameters

  • top=<int>

  • bottom=<int>

  • left=<int>

  • right=<int> clip out the range to decide field shift.

  • method_switch=<int> (0 - 256)
    threshold to swicth field shift algorithm.

  • coeff_shift=<int> (0 - 256)
    threshold for field shift, with bigger value, more field shift will be occurred.

  • thre_shift=<int> (0 - 1024)
    threshold for stripe detection which will be used on shift decision. Lower value will result more stripe detection.

  • thre_deint=<int> (0 - 1024)
    threshold for stripe detection which will be used on deinterlacing. Lower value will result more stripe detection.

  • thre_motion_y=<int> (0 - 1024)

  • thre_motion_c=<int> (0 - 1024)
    threshold for motion detection. Lower value will result more motion detection.

  • level=<int> (0 - 4)
    Select how to remove the stripes.

    level	process	target	decription
    0	none		Stripe removing process will not be done. New frame generated by field shift will be the output.
    1	triplication	all pixels	Blend previous field into new frame generated by field shift. Stripe caused be motion will all become afterimage.
    2	duplicate	stripe-detected pixels	Blend previous field into new frame generated by field shift, only on stripe detected pixels. Should be used for movies with little motion.
    3 (default)	duplicate	motion-detected pixels	Blend previous field into new frame generated by field shift, only on motion detected pixels. This mode can preserve more edges or small letters compared to level 2.
    4	interpolate	motion-detected pixels	On motion detected pixels, drop one field, and generate pixel by interpolating from the other field. There will be no afterimage, but the vertical resolution of pixels with motion will halved.

  • shift=<bool>
    Enable field shift.

  • drop=<bool>
    drop frame which has shorter display time than "1 frame". Note that enabling this option will generate VFR (Variable Frame Rate) output. When muxing is done by NVEncC, the timecode will be applied automatically. However, when using raw output, you will need output timecode file by adding "timecode=true" to vpp-afs option, and mux the timecode file later.

  • smooth=<bool>
    Smoothen picture display timing.

  • 24fps=<bool>
    Force 30fps -> 24fps conversion.

  • tune=<bool>
    When this options is set true, the output will be the result of motion and stripe detection, shown by the color below.

    color	description
    dark blue	motion was detected
    grey	stripe was detected
    light blue	motion & stripe was detected

  • rff=<bool>
    When this options is set true, rff flag from input will be checked, and when there is progressive frame coded with rff, then deinterlacing will not be applied.

  • log=<bool>
    Generate log of per frame afs status (for debug).

  • preset=<string>
    Parameters will be set as below.

    preset name	default	triple	double	anime cinema	min_afterimg	24fps	30fps
    method_switch	0	0	0	64	0	92	0
    coeff_shift	192	192	192	128	192	192	192
    thre_shift	128	128	128	128	128	448	128
    thre_deint	48	48	48	48	48	48	48
    thre_motion_y	112	112	112	112	112	112	112
    thre_motion_c	224	224	224	224	224	224	224
    level	3	1	2	3	4	3	3
    shift	on	off	on	on	on	on	off
    drop	off	off	on	on	on	on	off
    smooth	off	off	on	on	on	on	off
    24fps	off	off	off	off	off	on	off
    tune	off	off	off	off	off	off	off
    rff	off	off	off	off	off	off	off

• Examples

  example: same as --vpp-afs preset=24fps
  --vpp-afs preset=anime,method_switch=92,thre_shift=448,24fps=true
  

--vpp-nnedi [<param1>=<value1>][,<param2>=<value2>],...

nnedi deinterlacer.

• parameters

  • field

    • auto (default)
      Generate latter field from first field.
    • top
      Generate bottom field using top field.
    • bottom
      Generate top field using bottom field.

  • nns (default: 32)
    Neurons of neural net.

    • 16, 32, 64, 128, 256

  • nsize (default: 32x4)
    Area size which neural net uses to generate a pixel.

    • 8x6, 16x6, 32x6, 48x6, 8x4, 16x4, 32x4

  • quality
    quality settings.

    • fast (default) Use one neural net to generate output.

    • slow
      "slow" uses another neural net and blends 2 outputs from different network to enhance quality.

  • prescreen

    • none
      No pre-screening is done and all pixels will be generated by neural net.

    • original

    • new Runs prescreener to determine which pixel to apply neural net, other pixels will be generated from simple interpolation.

    • original_block

    • new_block (default)
      GPU optimized version of "original", "new". Applies screening based on block, and not pixel.

  • errortype
    Select weight parameter for neural net.

    • abs (default)
      Use weight trained to minimize absolute error.
    • square
      Use weight trained to minimize square error.

  • prec
    Select precision.

    • auto (default)
      Use fp16 whenever it is available and will be faster, otherwise use fp32.

    • fp16
      Force to use fp16. x64 only.

    • fp32
      Force to use fp32.

  • weightfile
    Set path of weight file. By default (not specified), internal weight params will be used.

• Examples

  example: --vpp-nnedi field=auto,nns=64,nsize=32x6,quality=slow,prescreen=none,prec=fp32
  

--vpp-yadif [<param1>=<value1>]

Yadif deinterlacer.

• parameters

  • mode

    • auto (default)
      Generate latter field from first field.
    • tff
      Generate bottom field using top field.
    • bff
      Generate top field using bottom field.
    • bob
      Generate one frame from each field.
    • bob_tff
      Generate one frame from each field assuming top field first.
    • bob_bff
      Generate one frame from each field assuming bottom field first.

--vpp-decomb [<param1>=<value1>][,<param2>=<value2>],...

Decomb deinterlaer.

• parameters

  • full=<bool>
    deinterlace all frames. default on.

  • threshold=<int>
    threshold for combed frame detection. default 20 (0 - 255).

  • dthreshold=<int> threshold for deinterlacing frames detected as combed. default 7 (0 - 255).

  • blend=<bool>
    blend rather than interpolate. default off.

--vpp-decimate [<param1>=<value1>][,<param2>=<value2>],...

Drop duplicated frame in cycles set.

• parameters

  • cycle=<int> (default: 5)
    num of frame to select frame(s) to be droppped.

  • drop=<int> (default: 1)
    num of frame(s) to drop within a cycle.

  • thredup=<float> (default: 1.1, 0.0 - 100.0)
    duplicate threshold.

  • thresc=<float> (default: 15.0, 0.0 - 100.0)
    scene change threshold.

  • blockx=<int>

  • blocky=<int>
    block size of x and y direction, default = 32. block size could be 4, 8, 16, 32, 64.

  • chroma=<bool>
    consdier chroma (default: on).

  • log=<bool>
    output log file (default: off).

--vpp-mpdecimate [<param1>=<value1>][,<param2>=<value2>],...

Drop consequentive duplicate frame(s) and create a VFR video, which might improve effective encoding performance, and improve compression efficiency. Please note that --avsync vfr is automatically activated when using this filter.

• parameters

  • hi=<int> (default: 768, 8x8x12)
    The frame might be dropped if no 8x8 block difference is more than "hi".

  • lo=<int> (default: 320, 8x8x5)

  • frac=<float> (default: 0.33)
    The frame might be dropped if the fraction of 8x8 blocks with difference smaller than "lo" is more than "frac".

  • max=<int> (default: 0)
    Max consecutive frames which can be dropped (if positive).
    Min interval between dropped frames (if negative).

  • log=<bool>
    output log file. (default: off)

--vpp-select-every <int>[,<param1>=<int>]

select one frame per specified frames and create output.

• parameters

  • step=<int>

  • offset=<int> (default: 0)

• Examples

  example1 (same as "select even"): --vpp-select-every 2
  example2 (same as "select odd "): --vpp-select-every 2,offset=1
  

--vpp-rotate <int>

Rotate video. 90, 180, 270 degrees is allowed.

--vpp-transform [<param1>=<value1>][,<param2>=<value2>],...

• Parameters

  • flip_x=<bool>

  • flip_y=<bool>

  • transpose=<bool>

--vpp-convolution3d [<param1>=<value1>][,<param2>=<value2>],...

3d noise reduction.

• Parameters

  • matrix=<string> (default=original)
    select matrix to use.

    • standard

      1 2 1 2 4 2 1 2 1 
      2 4 1 4 8 4 2 4 1 
      1 2 1 2 4 2 1 2 1 
      

    • simple

      1 1 1 1 1 1 1 1 1 
      1 1 1 1 1 1 1 1 1 
      1 1 1 1 1 1 1 1 1 
      

  • fast=<bool&gt (default=false)
    Use more simple fast mode.

  • ythresh=<float> (default=3, 0-255)
    Spatial luma threshold to take care of edges. Larger threshold will result stronger denoising, but blurring might occur arround edges.

  • cthresh=<float> (default=4, 0-255)
    Spatial chroma threshold. Larger threshold will result stronger denoising, but blurring might occur arround edges.

  • t_ythresh=<float> (default=3, 0-255)
    Temporal luma threshold. Larger threshold will result stronger denoising, but ghosting might occur. Threshold below 10 is recommended.

  • t_cthresh=<float> (default=4, 0-255)
    Temporal chroma threshold. Larger threshold will result stronger denoising, but ghosting might occur. Threshold below 10 is recommended.

• Examples

  Example: using simple matrix
  --vpp-convolution3d matrix=simple
  

--vpp-nvvfx-denoise [<param1>=<value1>][,<param2>=<value2>],...

Webcam denoise filter from NVIDIA MAXINE VideoEffects SDK, which is supported on x64 version only. This will removes low-light camera noise from a webcam video while preserving the texture details, supporting resolutions between 80p to 1080p.

This fitler is supported on Turing Gen GPU (RTX20xx) or later. Please download and install Video Effect models and runtime dependencies to use this filter.

• parameters
  • strength=<int>

    • 0
      Weaker effect, which places a higher emphasis on texture preservation.

    • 1
      Stronger effect, which places a higher emphasis on noise removal.

--vpp-nvvfx-artifact-reduction [<param1>=<value1>][,<param2>=<value2>],...

Artifact reduction filter from NVIDIA MAXINE VideoEffects SDK, which is supported on x64 version only. This will reduce encoder artifacts, while preserving the details of orginal video, supporting resolutions between 90p to 1080p.

This fitler is supported on Turing Gen GPU (RTX20xx) or later. Please download and install Video Effect models and runtime dependencies to use this filter.

• parameters
  • mode=<int>

    • 0 (default)
      Removes lesser artifacts, preserves low gradient information better, and is suited for higher bitrate videos.

    • 1
      Results stronger effect, suitable for lower bitrate videos.

--vpp-smooth [<param1>=<value1>][,<param2>=<value2>],...

• parameters

  • quality=<int> (default=3, 1-6)
    Quality of the filter. Larger value should result in higher quality but with lower speed.

  • qp=<int> (default=12, 1 - 63)
    Strength of the filter. Larger value will result stronger denoise but with blurring.

  • prec
    Select precision.

    • auto (default)
      Use fp16 whenever it is available and will be faster, otherwise use fp32.

    • fp16
      Force to use fp16. x64 only.

    • fp32
      Force to use fp32.

--vpp-denoise-dct [<param1>=<value1>][,<param2>=<value2>],...

• parameters

  • step=<int>
    Quality of the filter. Smaller value should result in higher quality but with lower speed.

    • 1 (high quality, slow)
    • 2 (default)
    • 4
    • 8 (fast)

  • sigma=<float> (default=4.0)
    Strength of the filter. Larger value will result stronger denoise but with blurring.

  • block_size=<int> (default=8)

    • 8
    • 16 (slow)

--vpp-fft3d [<param1>=<value1>][,<param2>=<value2>],...

FFT based denoise filter.

• parameters

  • sigma=<float>
    Strength of filter. (default=1.0, 0.0 - 100.0)

  • amount=<float> (default=1.0, 0.0 - 1.0)
    Amount of denoising.

  • block_size=<int> (default=32)

    • 8
    • 16
    • 32
    • 64

  • overlap=<float> (default=0.5, 0.2 - 0.8)
    Block overlap, value 0.5 or larger is recomended.

  • method=<int> (default = 0)

    • 0 ... wiener method
    • 1 ... hard thresholding

  • temporal=<int> (default = 1)

    • 0 ... spatial filtering only
    • 1 ... enable temporal filtering

  • prec=<string> (default = auto)

    • auto ... use fp16 if possible (faster)
    • fp32 ... always use fp32

--vpp-knn [<param1>=<value1>][,<param2>=<value2>],...

Strong noise reduction filter.

• Parameters

  • radius=<int> (default=3, 1-5)
    radius of filter. Larger value will result stronger denosing, but will require more calculation.

  • strength=<float> (default=0.08, 0.0 - 1.0)
    Strength of the filter. Larger value will result stronger denosing.

  • lerp=<float> (default=0.2, 0.0 - 1.0)
    The degree of blending of the original pixel to the noise reduction pixel.

  • th_lerp=<float> (default=0.8, 0.0 - 1.0)
    Threshold of edge detection.

• Examples

  Example: slightly stronger than default
  --vpp-knn radius=3,strength=0.10,lerp=0.1
  

--vpp-nlmeans [<param1>=<value1>[,<param2>=<value2>]...]

Non local means noise reduction filter. Only supported in 64bit binary.

• Parameters

  • sigma=<float> (default=0.005, 0.0 -)
    Noise variance. Larger value will result stronger denosing.

  • h=<float> (default=0.05, 0.0 <)
    Parameter. Larger value will result the weight to be more flat.

  • patch=<int> (default=5, 3 - 21)
    Set patch size. Must be odd number.

  • search=<int> (default=11, 3 - 21)
    Set search size. Must be odd number.

  • fp16=<string> (default=blockdiff)

    • none
      Do not use fp16 and use fp32. High precision but slow.

    • blockdiff
      Use fp16 in block diff calculation. Balanced between performace and precision.

    • all
      Additionally use fp16 in weight calculation. Fast but low precision.

• Examples

  Example: Use larger search area
  --vpp-nlmeans patch=7,search=15
  

--vpp-pmd [<param1>=<value1>][,<param2>=<value2>],...

Rather weak noise reduction by modified pmd method, aimed to preserve edge while noise reduction.

• Parameters

  • apply_count=<int> (default=2, 1- )
    Number of times to apply the filter. Applying filter many times will remove noise stronger.

  • strength=<float> (default=100, 0-100)
    Strength of the filter.

  • threshold=<float> (default=100, 0-255)
    Threshold for edge detection. The smaller the value is, more will be detected as edge, which will be preserved.

• Examples

  Example: Slightly weak than default
  --vpp-pmd apply_count=2,strength=90,threshold=120
  

--vpp-gauss <int>

Specify the size of Gaussian filter, from 3, 5 or 7.
It is necessary to add nppc64_10.dll, nppif64_10.dll, nppig64_10.dll in the same folder of NVEncC64, and could be used only in x64 version.

The npp dlls can be downloaded from this link (npp64_10_dll_7zip.7z).

--vpp-subburn [<param1>=<value1>][,<param2>=<value2>],...

"Burn in" specified subtitle to the video. Text type subtitles will be rendered by libass.

• Parameters

  • track=<int>
    Select subtitle track of the input file to burn in, track count starting from 1. Available when --avhw or --avsw is used.

  • filename=<string>
    Select subtitle file path to burn in.

  • charcode=<string>
    Specify subtitle charcter code to burn in, for text type sub.

  • shaping=<string>
    Rendering quality of text, for text type sub.

    • simple
    • complex (default)

  • scale=<float> (default=0.0 (auto))
    scaling multiplizer for bitmap fonts.

  • transparency=<float> (default=0.0, 0.0 - 1.0)
    adds additional transparency for subtitle.

  • brightness=<float> (default=0.0, -1.0 - 1.0)
    modifies brightness of the subtitle.

  • contrast=<float> (default=1.0, -2.0 - 2.0)
    modifies contrast of the subtitle.

  • vid_ts_offset=<bool>
    add timestamp offset to match the first timestamp of the video file (default on)　　 Please note that when "track" is used, this options is always on.

  • ts_offset=<float> (default=0.0)
    add offset in seconds to the subtitle timestamps (for debug perpose).

  • fontsdir=<string>
    directory with fonts used.

  • forced_subs_only=<bool>
    render forced subs only (default: off).

• Examples

  Example1: burn in subtitle from the track of the input file
  --vpp-subburn track=1
  
  Example2: burn in PGS subtitle from file
  --vpp-subburn filename="subtitle.sup"
  
  Example3: burn in ASS subtitle from file which charcter code is Shift-JIS
  --vpp-subburn filename="subtitle.sjis.ass",charcode=sjis,shaping=complex
  

--vpp-libplacebo-shader [<param1>=<value1>][,<param2>=<value2>],...

Apply custom shaders in the specified path using libplacebo.

• Parameters

  • shader=<string>
    Target shader file path. (glsl file)

  • res=<int>x<int>
    Output resolution of the filter.

  • colorsystem=<string>
    Color system to use. Default: auto detect.

    unknown, bt601, bt709, smpte240m, bt2020nc, bt2020c, bt2100pq, bt2100hlg, dolbyvision, ycgco, rgb, xyz
    

  • transfer=<string>
    Output transfer function. Default: auto detect.

    unknown, srgb, bt1886, linear,
    gamma18, gamma20, gamma22, gamma24, gamma26, gamma28,
    prophoto, st428, pq, hlg, vlog, slog1, slog2
    

  • resampler=<string>
    Filter function to use when resample is required. Default: libplacebo-ewa-lanczos.

    libplacebo-spline16, libplacebo-spline36, libplacebo-spline64, libplacebo-nearest,
    libplacebo-bilinear, libplacebo-gaussian, libplacebo-sinc, libplacebo-lanczos, 
    libplacebo-ginseng, libplacebo-ewa-jinc, libplacebo-ewa-lanczos, 
    libplacebo-ewa-lanczossharp, libplacebo-ewa-lanczos4sharpest, 
    libplacebo-ewa-ginseng, libplacebo-ewa-hann, libplacebo-ewa-hanning, 
    libplacebo-bicubic, libplacebo-triangle, libplacebo-hermite, libplacebo-catmull-rom, 
    libplacebo-mitchell, libplacebo-mitchell-clamp, libplacebo-robidoux, 
    libplacebo-robidouxsharp, libplacebo-ewa-robidoux, libplacebo-ewa-robidouxsharp
    

  • radius=<float>
    Adjust the function's radius. Default: auto. Must be between 0.0 and 16.0.

  • clamp=<float>
    Clamping coefficient for negative weights. Default: 0.0. Must be between 0.0 and 1.0.

  • taper=<float>
    Additional taper coefficient. Default: 0.0. Must be between 0.0 and 1.0.

  • blur=<float>
    Additional blur coefficient. Default: 0.0. Must be between 0.0 and 100.0.

  • antiring=<float>
    Antiringing strength. Default: 0.0. Must be between 0.0 and 1.0.

  • linear=<bool>
    linearize image bdfore processing.

• Examples

  Example: Apply a custom shader (1280x720 -> 2560x1440)
  --vpp-libplacebo-shader shader=default-shader-pack-2.1.0\Anime4K_Upscale_CNN_x2_L.glsl,res=2560x1440
  

--vpp-resize <string> or [<param1>=<value1>][,<param2>=<value2>],...

Specify the resizing algorithm.

• options

  • algo=<string>
    When unspecified, it will be auto selected. select which algorithm to use.

    • CUDA based resize filters.

      name	description
      auto	auto select
      bilinear	linear interpolation
      bicubic	bicubic interpolation
      spline16	4x4 spline curve interpolation
      spline36	6x6 spline curve interpolation
      spline64	8x8 spline curve interpolation
      lanczos2	4x4 Lanczos resampling
      lanczos3	6x6 Lanczos resampling
      lanczos4	8x8 Lanczos resampling

    • npp library resize filters

      name	description
      nn	nearest neighbor
      npp_linear	linear interpolation by NPP library
      cubic	4x4 cubic interpolation
      super	So called "super sampling" by NPP library (downscale only)
      lanczos	Lanczos interpolation

      Filters on the table will use the NPP library, which supports x64 version only. To use those algorithms, you need to download nppc64_10.dll, nppif64_10.dll, nppig64_10.dll separately and place it in the same folder as NVEncC64.exe. The npp dlls can be downloaded from this link (npp64_10_dll_7zip.7z).

    • nvvfx library resize filters

      name	description
      nvvfx-superres	Super Resolution based on nvvfx library (upscale only)

      nvvfx-superres is super resolution filter from NVIDIA MAXINE VideoEffects SDK, which is supported on x64 version only. This mode is supported on Turing Gen GPU (RTX20xx) or later. Please download and install Video Effect models and runtime dependencies to use this mode.

      • Additional parameters

        • superres-mode=<int>
          select mode for nvvfx-superres

          • 0 ... conservative (default)
          • 1 ... aggressive

        • superres-strength=<float>
          strength for nvvfx-superres (0.0 - 1.0)

    • NGX library resize filters

      name	description
      ngx-vsr	NVIDIA VSR (Video Super Resolution)

      Requires Turing GPUs or later, and requires driver version 550.58 or higher. Supported on Windows system only.

      • Additional parameters
        • vsr-quality=<int> quality for ngx-vsr (1 - 4, default=1) larger value results higher quality.

    • libplacebo library resize filters

      name	description	resizable
      libplacebo-spline16	4x4 spline curve interpolation
      libplacebo-spline36	6x6 spline curve interpolation
      libplacebo-spline64	8x8 spline curve interpolation
      libplacebo-nearest	nearest neighbor
      libplacebo-bilinear	linear interpolation	✓
      libplacebo-gaussian	Gaussian filter	✓
      libplacebo-sinc	Sinc filter	✓
      libplacebo-lanczos	Lanczos resampling	✓
      libplacebo-ginseng	Ginseng filter	✓
      libplacebo-ewa-jinc	EWA Jinc resampling	✓
      libplacebo-ewa-lanczos	EWA Lanczos resampling	✓
      libplacebo-ewa-lanczossharp	EWA Lanczos sharp resampling	✓
      libplacebo-ewa-lanczos4sharpest	EWA Lanczos 4 sharpest resampling	✓
      libplacebo-ewa-ginseng	EWA Ginseng resampling	✓
      libplacebo-ewa-hann	EWA Hann filter	✓
      libplacebo-ewa-hanning	EWA Hanning filter	✓
      libplacebo-bicubic	Bicubic interpolation
      libplacebo-triangle	Triangle filter
      libplacebo-hermite	Hermite filter
      libplacebo-catmull-rom	Catmull-Rom spline interpolation
      libplacebo-mitchell	Mitchell-Netravali filter
      libplacebo-mitchell-clamp	Mitchell-Netravali filter with clamping
      libplacebo-robidoux	Robidoux filter
      libplacebo-robidouxsharp	Robidoux sharp filter
      libplacebo-ewa-robidoux	EWA Robidoux filter
      libplacebo-ewa-robidouxsharp	EWA Robidoux sharp filter

      These filters are supported on Windows x64 version only.

      • Additional parameters

        • pl-radius=<float>

          Radius used for resizable algorithm in libplacebo-resample. (0.0 - 16.0, default = auto)

        • pl-clamp=<float>

          Clamp coefficient for negative weights used in libplacebo-resample, 1.0 will make weight 0 for negative weights. (0.0 - 1.0, default = 0.0)

        • pl-taper=<float>

          Taper will flatten weight function in the center for libplacebo-resample. (0.0 - 1.0, default = 0.0)

        • pl-blur=<float>

          Additional blur coefficient for libplacebo-resample. (0.0 - 100.0, default = 0.0)

        • pl-antiring=<float>

          Antiringing strength for libplacebo-resample. (0.0 - 1.0, default = 0.0)

• Examples

  Examples: Use spline64 (in short)
  --vpp-resize spline64
  
  Examples: Use spline64
  --vpp-resize algo=spline64 
  
  Examples: Use nvvfx-superres in mode 1
  --vpp-resize algo=nvvfx-superres,superres-mode=1
  
  Examples: Use ngx-vsr in best quality
  --vpp-resize algo=ngx-vsr,vsr-quality=4
  
  Examples: Use libplacebo resize filters
  --vpp-resize algo=libplacebo-sinc,pl-radius=3.0,pl-antiring=0.5
  

--vpp-unsharp [<param1>=<value1>][,<param2>=<value2>],...

unsharp filter, for edge and detail enhancement.

• Parameters

  • radius=<int> (default=3, 1-9)
    radius of edge / detail detection.

  • weight=<float> (default=0.5, 0-10)
    Strength of edge and detail emphasis. Larger value will result stronger effect.

  • threshold=<float> (default=10.0, 0-255)
    Threshold for edge and detail detection.

• Examples

  Example: Somewhat stronger
  --vpp-unsharp weight=1.0
  

--vpp-edgelevel [<param1>=<value1>][,<param2>=<value2>],...

Edge level adjustment filter, for edge sharpening.

• Parameters

  • strength=<float> (default=5.0, -31 - 31)
    Strength of edge sharpening. Larger value will result stronger edge sharpening.

  • threshold=<float> (default=20.0, 0 - 255)
    Noise threshold to avoid enhancing noise. Larger value will treat larger luminance change as noise.

  • black=<float> (default=0.0, 0-31)
    strength to enhance dark part of edges.

  • white=<float> (default=0.0, 0-31)
    strength to enhance bright part of edges.

• Examples

  Example: Somewhat stronger (Aviutl version default)
  --vpp-edgelevel strength=10.0,threshold=16.0,black=0,white=0
  
  Example: Strengthening the black part of the outline
  --vpp-edgelevel strength=5.0,threshold=24.0,black=6.0
  

--vpp-warpsharp [<param1>=<value1>][,<param2>=<value2>],...

Edge warping (sharpening) filter.

• Parameters

  • threshold=<float> (default=128.0, 0 - 255)
    Threshold used when detencting edges. Raising this value will result stronger sharpening.

  • blur=<int> (default=2)
    Number of times to blur. More times of blur will result weaker sharpening.

  • type=<int> (default=0)

    • 0 ... use 13x13 size blur.
    • 1 ... use 5x5 size blur. This results higher quality, but requires more blur counts.

  • depth=<float> (default=16.0, -128.0 - 128.0)
    Depth of warping, raising this value will result stronger sharpening.

  • chroma=<int> (default=0)
    Select how to process chroma channels.

    • 0 ... Use luma based mask to process hcroma channels.
    • 1 ... Create individual mask for each chroma channels.

• Examples

  Example: Using type 1.
  --vpp-warpsharp threshold=128,blur=3,type=1
  

--vpp-tweak [<param1>=<value1>][,<param2>=<value2>],...

• Parameters

  • brightness=<float> (default=0.0, -1.0 - 1.0)

  • contrast=<float> (default=1.0, -2.0 - 2.0)

  • gamma=<float> (default=1.0, 0.1 - 10.0)

  • saturation=<float> (default=1.0, 0.0 - 3.0)

  • hue=<float> (default=0.0, -180 - 180)

  • swapuv=<bool> (default=false)

  • y_offset=<float> (default=0.0, -1.0 - 1.0)

  • y_gain=<float> (default=1.0, -2.0 - 2.0)

  • cb_offset=<float> (default=0.0, -1.0 - 1.0)

  • cb_gain=<float> (default=1.0, -2.0 - 2.0)

  • cr_offset=<float> (default=0.0, -1.0 - 1.0)

  • cr_gain=<float> (default=1.0, -2.0 - 2.0)

  • r_offset=<float> (default=0.0, -1.0 - 1.0)

  • r_gain=<float> (default=1.0, -2.0 - 2.0)

  • r_gamma=<float> (default=1.0, 0.1 - 10.0)

  • g_offset=<float> (default=0.0, -1.0 - 1.0)

  • g_gain=<float> (default=1.0, -2.0 - 2.0)

  • g_gamma=<float> (default=1.0, 0.1 - 10.0)

  • b_offset=<float> (default=0.0, -1.0 - 1.0)

  • b_gain=<float> (default=1.0, -2.0 - 2.0)

  • b_gamma=<float> (default=1.0, 0.1 - 10.0)

• Examples

  Example:
  --vpp-tweak brightness=0.1,contrast=1.5,gamma=0.75
  

--vpp-curves [<param1>=<value1>][,<param2>=<value2>],...

Apply color adjustments using curves.

• Parameters

  • preset=<float>

    • none
    • color_negative
    • process
    • darker
    • lighter
    • increase_contrast
    • linear_contrast
    • medium_contrast
    • strong_contrast
    • negative
    • vintage

  • m=<string>
    Set master curve points, post process for luminance.

  • r=<string>
    Set curve points for red. Will override preset settings.

  • g=<string>
    Set curve points for green. Will override preset settings.

  • b=<string>
    Set curve points for blue. Will override preset settings.

  • all=<string>
    Set curve points for r,g,b when not specified. Will override preset settings.

• Examples

  Example:
  --vpp-curves r="0/0.11 0.42/0.51 1/0.95":g="0/0 0.50/0.48 1/1":b="0/0.22 0.49/0.44 1/0.8"
  

--vpp-deband [<param1>=<value1>][,<param2>=<value2>],...

• Parameters

  • range=<int> (default=15, 0-127)
    Blur range. Samples to be used for blur are taken from pixels within this range.

  • sample=<int> (default=1, 0-2)

    • sample = 0 Processing is performed by referring a pixel within "range".

    • sample = 1 Blur processing is performed by referring total of 2 pixels, a pixel within "range" and its point symmetric pixel.

    • sample = 2 Blur processing is performed by referring total of 4 pixels including 2 pixels within "range" and their point symmetric pixels.

  • thre=<int> (set same threshold for y, cb & cr)

  • thre_y=<int> (default=15, 0-31)

  • thre_cb=<int> (default=15, 0-31)

  • thre_cr=<int> (default=15, 0-31)
    Threshold for y, cb, cr blur. If this value is high, the filter will be stronger, but thin lines and edges are likely to disappear.

  • dither=<int> (set same dither for y & c)

  • dither_y=<int> (default=15, 0-31)

  • dither_c=<int> (default=15, 0-31)
    Dither strength of y & c.

  • seed=<int>
    Change of random number seed. (default = 1234)

  • blurfirst (default=off)
    Stronger effect could be expected, by processing blur first. However side effects may also become stronger, which might make thin lines to disappear.

  • rand_each_frame (default=off)
    Change the random number used by the filter every frame.

• Examples

  Example:
  --vpp-deband range=31,dither=12,rand_each_frame
  

--vpp-libplacebo-deband [<param1>=<value1>][,<param2>=<value2>],...

Deband filter by libplacebo.

• Parameters

  • iterations=<int>
    iterations (default=1, 0-)

  • threshold=<float>
    cut-off threshold (default=4.0, 0-)

  • radius=<float>
    initial radius (default=16.0, 0-)

  • grain_y=<float>
    extra noise for luma (default=6.0, 0-)

  • grain_c=<float>
    extra noise for chroma (default=grain_y, 0-)

  • dither=<string>
    dither mode, only for 8bit.

    • none
    • blue_noise (default)
    • ordered_lut
    • ordered_fixed
    • white_noise

  • lut_size=<int>
    size of LUT. (default=64) 2, 4, 8, 16, 32, 64, 128, 256

• Examples

  Example:
  --vpp-libplacebo-deband iterations=1,radius=32
  

--vpp-pad <int>,<int>,<int>,<int>

add padding to left,top,right,bottom (in pixels)

--vpp-overlay [<param1>=<value1>][,<param2>=<value2>],...

Overlay image on top of base video.

• Parameters

  • file=<string>
    source file path of the image. When video is used for file, video framerate should be equal to base video file.

  • pos=<int>x<int>
    position to add image.

  • size=<int>x<int>
    size of image.

  • alpha=<float> (default: 1.0 (0.0 - 1.0))
    alpha value of overlay.

  • alpha_mode=<string>

    • override ... set value of alpha
    • mul ... multiple original value
    • lumakey ... set alpha depending on luma

  • lumakey_threshold=<float> (default: 0.0 (dark: 0.0 - 1.0 :bright))
    luma used for tranparency.

  • lumakey_tolerance=<float> (default: 0.1 (0.0 - 1.0))
    set luma range to be keyed out.

  • lumakey_softness=<float> (default: 0.0 (0.0 - 1.0))
    set the range of softness for lumakey.

• Example:

  --vpp-overlay file=logo.png,pos=1620x780,size=300x300
  --vpp-overlay file=logo.mp4,pos=0x800,alpha_mode=lumakey,lumakey_threshold=0.0,lumakey_tolerance=0.1
  

--vpp-ngx-truehdr [<param1>=<value1>][,<param2>=<value2>],...

AI enhanced SDR to HDR conversion using RTX Video SDK. Output will be converted to colormatrix bt.2020. Adding --colormatrix bt2020nc --colorprim bt2020 --transfer smpte2084 is recommended.

Requires Turing GPUs or later, and requires driver version 550.58 or higher. Supported on Windows system only.

Default paramters are based on the values on the link. Please note that the parameter range for contrast and saturation differs from the link, you will need to add "+100" for contrast and saturation written in the link.

• Parameters

  • contrast=<int> (default=125, 0 - 200)
    adjusts the difference between lights and darks.

  • saturation=<int> (default=75, 0 - 200)
    adjusts color intensity.

  • middlegray=<int> (default=44, 10 - 100)
    adjusts average brightness.

  • maxluminance=<int> (default=1000, 400 - 2000)
    adjusts peak brightness in nits.

• Examples

  --vpp-ngx-truehdr maxluminance=1200
  

--vpp-fruc [<param1>=<value1>][,<param2>=<value2>],...

Frame rate conversion based on NVIDIA Optical Flow FRUC(Frame Rate Up Conversion).

Requires Turing GPUs or later, and requires driver version 528.24 or higher. Supported on Windows system only.

Also, due to limitation of NVIDIA Optical Flow FRUC, this filter will be process in 8bit mode, even if input or output is 10bit.

• Parameters

  • double Convert to double framerate.

  • fps=<int>/<int> Convert to framerate specified.

• Examples

  Example: Convert to double framerate
  --vpp-fruc double
  
  Example: Convert to 59.94fps
  --vpp-fruc fps=60000/1001
  

--vpp-perf-monitor

Monitor the performance of each vpp filter, and output the average per frame processing time of the applied filter(s). Note that the overall encoding performance may slightly be harmed.

--vpp-nvvfx-model-dir <string>

Set path to the model folder of Video Effect models.

Other Options

--cuda-schedule <string>

Change the behavior of the CPU when waiting for GPU task completion. The default is auto.

• paramters

  • auto (default) Leave the mode decision to the driver of CUDA.

  • spin Always keep the CPU monitoring the GPU task to finish. The latency of synchronization will be minimun, but will always utilize 100% of one logical CPU core.

  • yeild Basically it is the same as spin, but switching to another running thread will be allowed.

  • sync Sleep a thread until the end of the GPU task. Performance might decrease, but will reduce CPU utilization especially when decoding is done by HW.

--disable-nvml <int>

Disable NVML GPU monitoring。

• Paramters

  • 0 (default)
    Enable NVML.

  • 1 Disable NVML when system has one CUDA devices.

  • 2 Always disable NVML.

--disable-nvml

Skip DX11 initilization. NGX and libplacebo filters cannot be used with this option.

--output-buf <int>

Specify the output buffer size in MB. The default is 8 and the maximum value is 128.

The output buffer will store output data until it reaches the buffer size, and then the data will be written at once. Higher performance and reduction of file fragmentation on the disk could be expected.

On the other hand, setting too much buffer size could decrease performance, since writing such a big data to the disk will take some time. Generally, leaving this to default should be fine.

If a protocol other than "file" is used, then this output buffer will not be used.

--output-thread <int>

Specify whether to use a separate thread for output.

• -1 ... auto (default)
• 0 ... do not use output thread
• 1 ... use output thread
  Using output thread increases memory usage, but sometimes improves encoding speed.

--log <string>

Output the log to the specified file.

--log-level [<param1>=]<value>[,<param2>=<value>]...

Select the level of log output.

• level

  • trace ... Output information for each frame (slow)
  • debug ... Output additional information, mainly for debug
  • info ... Display general encoding information (default)
  • warn ... Show errors and warnings
  • error ... Display only errors
  • quiet ... Show no logs

• Target
  Target category of logs. Will be handled as all when omitted.

  • all ... Set all targets.
  • app ... Set all targets, except libav, libass, perfmonitor, amf.
  • device ... Device initialization.
  • core ... Application core logs, including core_progress and core_result
  • core_progress ... Progress indicator
  • core_result ... Encode result
  • decoder ... decoder logs
  • input ... File input logs
  • output ... File output logs
  • vpp ... logs of vpp fitlers
  • amf ... logs of amf library
  • opencl ... logs of opencl
  • libav ... internal logs of libav library
  • libass ... logs of ass library
  • perfmonitor ... logs of perf monitoring

• Examples

  Example: Enable debug messages
  --log-level debug
  
  Example: Show only application debug messages
  --log-level app=debug
  
  Example: Show progress only
  --log-level error,core_progress=info
  

--log-opt <param1>=<value>[,<param2>=<value>]...

additional options for log output.

• parameters
  • addtime (default=off)
    Add time of to each line of the log.

--log-framelist [<string>]

FOR DEBUG ONLY! Output debug log for avsw/avhw reader.

--log-packets [<string>]

FOR DEBUG ONLY! Output debug log for packets read in avsw/avhw reader.

--log-mux-ts [<string>]

FOR DEBUG ONLY! Output debug log for packets written.

--thread-affinity [<string1>=]{<string2>[#<int>[:<int>]...] or 0x<hex>}

Set thread affinity to the process or threads of the application.

• target (<string1>) Set target of which thread affinity will be set. Default is "all".

  • all ... All targets below.
  • process ... process of NVEncC.
  • main ... main thread
  • decoder ... avhw decode thread
  • csp ... colorspace conversion threads (CPU)
  • input ... input thread
  • output ... output thread
  • audio ... audio processing threads
  • perfmonitor ... performance monitoring threads
  • videoquality ... ssim/psnr/vmaf calculation thread

• thread affinity (<string2>)

  • all ... All cores(no limit)
  • pcore ... performance cores (hybrid architecture only)
  • ecore ... efficiency cores (hybrid architecture only)
  • logical ... logical cores specified by the numbers after "#". (Windows only)
  • physical ... physical cores specified by the numbers after "#". (Windows only)
  • cachel2 ... cores which share the L2 cache specified by the numbers after "#". (Windows only)
  • cachel3 ... cores which share the L3 cache specified by the numbers after "#". (Windows only)
  • ... set by 0x (same as "start /affinity")

• Examples

  Example: Set process affinity to physical 0,1,2,5,6 cores
  --thread-affinity process=physical#0-2:5:6
  
  Example: Set process affinity to logical 0,1,2,3 cores
  --thread-affinity process=0x0f
  --thread-affinity process=logical#0-3
  --thread-affinity process=logical#0:1:2:3
  
  Example: Set performance monitoring thread to efficiency core on hybrid architecture
  --thread-affinity perfmonitor=ecore
  
  Example: Set process affinity to firect CCX on Ryzen CPUs
  --thread-affinity process=cachel3#0
  

--thread-priority [<string1>=]<string2>[#<int>[:<int>]...]

Set priority to the process or threads of the application. [Windows OS only]

• target (<string1>) Set target of which thread priority will be set. Default is "all".

  • all ... All targets below.
  • process ... whole process
  • main ... main thread
  • decoder ... avhw decode thread
  • csp ... colorspace conversion threads (CPU)
  • input ... input thread
  • encoder ... background encoder threads
  • output ... output thread
  • audio ... audio processing threads
  • perfmonitor ... performance monitoring threads
  • videoquality ... ssim/psnr/vmaf calculation thread

• Priority (<string2>)

  • background, idle, lowest, belownormal, normal (default), abovenormal, highest

• Examples

  Example: apply belownormal priority to whole process
  --thread-priority process=belownormal
  
  Example: apply belownormal priority to output thread, and background priority to performance monitoring threads
  --thread-priority output=belownormal,perfmonitor=background
  

--thread-throttling [<string1>=]<string2>[#<int>[:<int>]...]

Set power throttling mode to the threads of the application. [Windows OS only]

• target (<string1>) Set target of which thread power throttling mode will be set. Default is "all".

  • all ... All targets below.
  • main ... main thread
  • decoder ... avhw decode thread
  • csp ... colorspace conversion threads (CPU)
  • input ... input thread
  • encoder ... background encoder threads
  • output ... output thread
  • audio ... audio processing threads
  • perfmonitor ... performance monitoring threads
  • videoquality ... ssim/psnr/vmaf calculation thread

• mode (<string2>)

  • unset (default) ... mode will be set automatically depending on the encode target.
  • auto ... Let OS decide.
  • on ... prefer power efficiency.
  • off ... prefer performance.

• Examples

  Example: prefer power efficiency in output and performance monitoring threads
  --thread-throttling output=on,perfmonitor=on
  
  Example: prefer performance in main and input threads
  --thread-throttling main=off,input=off
  

--option-file <string>

File which containes a list of options to be used. Line feed is treated as a blank, therefore an option or a value of it should not splitted in multiple lines.

--max-procfps <int>

Set the upper limit of transcode speed. The default is 0 (= unlimited).

This could be used when you want to encode multiple stream and you do not want one stream to use up all the power of CPU or GPU.

• Examples

  Example: Limit maximum speed to 90 fps
  --max-procfps 90
  

--lowlatency

Tune for lower transcoding latency, but will hurt transcoding throughput. Not recommended in most cases.

--avsdll <string>

Specifies AviSynth DLL location to use. When unspecified, the default AviSynth.dll will be used.

--vsdir <string>

Specifies vapoursynth portable directory to use. Supported on Windows only.

--process-codepage <string> [Windows OS only]

• parameters

  • utf8
    Use UTF-8 as the codepage of the process. (Default)

  • os
    Change the character code of the process to be in the default codepage set in the Operating System.

    This shall allow AviSynth scripts using non-ASCII characters with legacy codepage to work again.

    When this option is set, a copy of the exe file will be created in the same directory of the original exe file, and the manifest file of the copy will be modified using UpdateResourceW API to switch back code page to the default of the OS, and then the copied exe will be run, allowing us to handle the AviSynth scripts using legacy code page.

--perf-monitor [<string>[,<string>]...]

Outputs performance information. You can select the information name you want to output as a parameter from the following table. The default is all (all information).

• parameters

   all          ... monitor all info
   cpu_total    ... cpu total usage (%)
   cpu_kernel   ... cpu kernel usage (%)
   cpu_main     ... cpu main thread usage (%)
   cpu_enc      ... cpu encode thread usage (%)
   cpu_in       ... cpu input thread usage (%)
   cpu_out      ... cpu output thread usage (%)
   cpu_aud_proc ... cpu aud proc thread usage (%)
   cpu_aud_enc  ... cpu aud enc thread usage (%)
   cpu          ... monitor all cpu info
   gpu_load    ... gpu usage (%)
   gpu_clock   ... gpu avg clock
   vee_load    ... gpu video encoder usage (%)
   ved_load    ... gpu video decoder usage (%)
   gpu         ... monitor all gpu info
   queue       ... queue usage
   mem_private ... private memory (MB)
   mem_virtual ... virtual memory (MB)
   mem         ... monitor all memory info
   io_read     ... io read  (MB/s)
   io_write    ... io write (MB/s)
   io          ... monitor all io info
   fps         ... encode speed (fps)
   fps_avg     ... encode avg. speed (fps)
   bitrate     ... encode bitrate (kbps)
   bitrate_avg ... encode avg. bitrate (kbps)
   frame_out   ... written_frames
  

--perf-monitor-interval <int>

Specify the time interval for performance monitoring with --perf-monitor in ms (should be 50 or more). The default is 500.