Noise

[fl4p]

Hello,

when I'm testing the virtual-audio-capture-grabber-device with ffmpeg, I got some noise in the recorded WAV file.

Any idea where this comes from?

Regards
Fabian

[rdp]

Is it just initial noise?
Does this demo record noise?
http://blogs.msdn.com/b/matthew_van_eerde/archive/2008/12/16/sample-wasapi-loopback-capture-record-what-you-hear.aspx

On Thu, Aug 8, 2013 at 5:49 AM, Fabian notifications@github.com wrote:

Hello,

when I'm testing the virtual-audio-capture-grabber-device with ffmpeg, I
got some noise in the recorded WAV file.

Any idea where this comes from?

Regards
Fabian

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/5
.

[fl4p]

It's continously during the whole recording, very low though, only noticable during silence.
The loopback-capture.exe does not record any noise.
You can clearly see the difference when opening the WAV files with a text editor: files recorded with loopback-capture.exe just contain zeros during silence.
The WAV file recorded with ffmped using the capture grabber device looks like this:
... 00 FF FF 00 00 FF FF 00 00 00 00 FF FF FF FF ...

The noise also appears in the pBuf during debugging.

[rdp]

Interesting...I think I vaguely recall running into it once...I'll check it
out as time allows....

On Thu, Aug 8, 2013 at 1:51 PM, Fabian notifications@github.com wrote:

It's continously during the whole recording, very low though, only
noticable during silence.
The loopback-capture.exe does not record any noise.
You can clearly see the difference when opening the WAV files with a text
editor: files recorded with loopback-capture.exe just contain zeros during
silence.
The WAV file recorded with ffmped using the capture grabber device looks
like this:
... 00 FF FF 00 00 FF FF 00 00 00 00 FF FF FF FF ...

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/5#issuecomment-22350467
.

[rdp]

OK try with the latest see if persists...