[Bug 690507] No audio recorded when creating an Audio/Video using qtmux

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=690507
  GStreamer | don't know | 1.0.3

Tim-Philipp Müller <t.i.m> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEEDINFO
                 CC|                            |t.i.m at zen.co.uk

--- Comment #1 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2013-03-16 13:56:10 UTC ---
Are you sure this is a GStreamer issue and not an issue with your sound setup?

I tried to reproduce this using:

 gst-launch-1.0 pulsesrc num-buffers=440 ! audioconvert ! 
'audio/x-raw,rate=44100,channels=2' ! queue ! qtmux ! filesink
location=/tmp/test.mov

and

 gst-launch-1.0 alsasrc num-buffers=440 ! audioconvert ! 
'audio/x-raw,rate=44100,channels=2' ! queue ! qtmux ! filesink
location=/tmp/test.mov

As it turns out, I had to change something in pavucontrol (I'm running
pulseaudio, and all alsa stuff goes through pulse in my setup).

I tested with:

gst-launch-1.0 alsasrc ! queue ! wavescope ! ximagesink sync=false

and also got silence (flat white line).

Then I opened pavucontrol, went to the 'Recording' tab, and switched:

   Alsa capture from [Monitor of Built-in Analog Stereo]

to

   Alsa capture from [Built-in Analog Stereo]

and things suddenly started working (white line showed some noise and peaks
when I tap on the mic).

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