webcam video recording is fine...but audio not functional

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webcam video recording is fine...but audio not functional

pangit_ako
Hello,

  I am using the following pipeline to attempt to record webcam video and
audio to disk:  

"gst-launch-1.0 -e autovideosrc ! queue ! videoconvert ! mkv. autoaudiosrc !
queue ! audioconvert ! mkv. matroskamux name=mkv ! filesink
location=test.mkv sync=false"

  The recording is created just fine, however the problem is with the
audio...there is none.  I seem to be getting only a 'clicking' sound when I
talk.  I have tested the microphone in my laptop and it seems to work fine.
In addition Windows reports the device is working properly.

  To perform an additional test, I created the following pipeline to test
only audio:

"gst-launch autoaudiosrc ! audioconvert ! vorbisenc ! oggmux ! filesink
location=dump.ogg"

  Again same result as before...clicking noises instead of audio speech in
the recording.

  And finally as another test I created a slightly modified version of the
original pipeline above:

"gst-launch-1.0 -e autovideosrc ! queue ! videoconvert ! mkv. autoaudiosrc !
queue ! audioconvert ! audio/x-raw,format=U8,channels=2 ! mkv. matroskamux
name=mkv ! filesink location=test.mkv sync=false"

  And I have the same problem...no audio in the recording.  

  Can somebody please offer some suggestion on what the possible problem
here might be?  Since my microphone seems to be functional I wonder if there
is something wrong with my pipeline code (although the identical problem on
multiple test pipelines would indicate that is not the case)...?  This is
very frustrating so any advice would be appreciated.  I thank you in
advance.

Regards



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Re: webcam video recording is fine...but audio not functional

Nirbheek Chauhan
On Fri, Mar 8, 2019 at 5:27 AM pangit_ako <[hidden email]> wrote:

>
> Hello,
>
>   I am using the following pipeline to attempt to record webcam video and
> audio to disk:
>
> "gst-launch-1.0 -e autovideosrc ! queue ! videoconvert ! mkv. autoaudiosrc !
> queue ! audioconvert ! mkv. matroskamux name=mkv ! filesink
> location=test.mkv sync=false"
>
>   The recording is created just fine, however the problem is with the
> audio...there is none.  I seem to be getting only a 'clicking' sound when I
> talk.  I have tested the microphone in my laptop and it seems to work fine.
> In addition Windows reports the device is working properly.
>
>   To perform an additional test, I created the following pipeline to test
> only audio:
>
> "gst-launch autoaudiosrc ! audioconvert ! vorbisenc ! oggmux ! filesink
> location=dump.ogg"
>
>   Again same result as before...clicking noises instead of audio speech in
> the recording.
>

Which version of Windows and GStreamer are you using? Try with the
latest stable release (1.14.x) or the latest development release
(1.15.2). Also try using wasapisrc instead of autoaudiosrc.

Another thing to try is wasapisrc provide-clock=false, and see if that
works better.

Cheers,
Nirbheek
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