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rdp / virtual-audio-capture-grabber-device

free audio capture device to capture all the "wave out sound" that is playing on your speakers (i.e. record what you hear) for Windows Vista+. Releases downloadable in this package:
https://github.com/rdp/screen-capture-recorder-to-video-windows-free
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Noise #5

Open fl4p opened 11 years ago

fl4p commented 11 years ago

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 commented 11 years ago

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/rdp/virtual-audio-capture-grabber-device/issues/5 .

fl4p commented 11 years ago

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 commented 11 years ago

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/rdp/virtual-audio-capture-grabber-device/issues/5#issuecomment-22350467 .

rdp commented 6 years ago

OK try with the latest see if persists...