kwarg: ffmpeg_loglevel (#294)

* ffmpeg_loglevel

.github/ISSUE_TEMPLATE/bug_report.md

@@ -33,6 +33,7 @@ A clear and concise description of what the bug is.
 A clear and concise description of what you expected to happen followed up with an explanation of what actually happened.
 
 **Stacktrace (If Applicable)**
+If the stacktrace includes some ffmpeg error please set the kwarg `ffmpeg_loglevel` to `"info"` i.e `render(your_video, "your_animation.gif", ffmpeg_loglevel = "info")`
 
 **Screenshots**
 If applicable, add your gif or drawing to help explain your problem.

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Javis.jl - Changelog
 
+## v0.3.2 (24th of November)
+- added `ffmpeg_loglevel` option for debugging purposes
+
 ## v0.3.1 (18th of November 2020)
 - removed `ColorTypes` as a dependency
 - docstring fixes for `morph_to`

Project.toml

@@ -1,7 +1,7 @@
 name = "Javis"
 uuid = "78b212ba-a7f9-42d4-b726-60726080707e"
 authors = ["Ole Kröger <o.kroeger@opensourc.es>", "Jacob Zelko <jacobszelko@gmail.com>"]
-version = "0.3.1"
+version = "0.3.2"
 
 [deps]
 Animations = "27a7e980-b3e6-11e9-2bcd-0b925532e340"

src/Javis.jl

@@ -163,7 +163,8 @@ end
  framerate=30,
  pathname="javis_GIBBERISH.gif",
  tempdirectory="",
- liveview=false
+ liveview=false,
+ ffmpeg_loglevel="panic"
  )
 
 Renders all previously defined [`Object`](@ref) drawings to the user-defined `Video` as a gif or mp4.
@@ -178,13 +179,17 @@ Renders all previously defined [`Object`](@ref) drawings to the user-defined `Vi
 - `tempdirectory::String`: The folder where each frame is stored
  Defaults to a temporary directory when not set
 - `liveview::Bool`: Causes a live image viewer to appear to assist with animation development
+- `ffmpeg_loglevel::String`:
+ - Can be used if there are errors with ffmpeg. Defaults to panic:
+ All other options are described here: https://ffmpeg.org/ffmpeg.html
 """
 function render(
  video::Video;
  framerate = 30,
  pathname = "javis_$(randstring(7)).gif",
  liveview = false,
  tempdirectory = "",
+ ffmpeg_loglevel = "panic",
 )
  objects = video.objects
  frames = preprocess_frames!(objects)
@@ -231,10 +236,10 @@ function render(
  isempty(pathname) && return
  if ext == ".gif"
  # generate a colorpalette first so ffmpeg does not have to guess it
- ffmpeg_exe(`-loglevel panic -i $(tempdirectory)/%10d.png -vf
+ ffmpeg_exe(`-loglevel $(ffmpeg_loglevel) -i $(tempdirectory)/%10d.png -vf
  "palettegen=stats_mode=diff" -y "$(tempdirectory)/palette.bmp"`)
  # then apply the palette to get better results
- ffmpeg_exe(`-loglevel panic -framerate $framerate -i $(tempdirectory)/%10d.png -i
+ ffmpeg_exe(`-loglevel $(ffmpeg_loglevel) -framerate $framerate -i $(tempdirectory)/%10d.png -i
  "$(tempdirectory)/palette.bmp" -lavfi
  "paletteuse=dither=sierra2_4a" -y $pathname`)
  elseif ext == ".mp4"