Public bug reported:
Binary package hint: pulseaudio
During the capture of the simultaneous output called combined.monitor
with the module-suspend-on-idle unloaded when the combined.monitor
device goes on idle parec stop to send data (= stop to record the
silence)
To reproduce this bug :
1 - Create a simultaneous output with pavucontrol > Configure Local Sound
Server > Simultaneous Output Tab, Check the box
2 - Comment load-module module-suspend-on-idle in the ~/.pulse/default.pa file
If this file does not exist, create it with the command cp
/etc/pulse/default.pa $HOME/.pulse/default.pa
You probably have to logout and login to apply the change
3 - Launch an application which produce some sound then redirect that
application to the Simultaneous output with pavucontrol > Volume Control
> Playback Tab
4 - Now record the combined.monitor device (=Simultaneous output) with the
command
parec --device=combined.monitor --format=s16le --rate=44100 --channels=2
--verbose test.pcm
If you pause or stops the playback in the audio application, the monitor.device
goes on idle (which is normal) BUT parec does not record the silence (= it stop
to send data to the test.pcm file)
When capturing a normal monitor device that you can lists with the command
below you do not have such problem
LANG=C pactl list | grep -A2 'Source #' | grep 'Name' | grep 'monitor' |
cut -d " " -f2
Example: with the command
parec --device=alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
--format=s16le --rate=44100 --channels=2 --verbose test.pcm
parec record the silence perfectly
-----
Ubuntu 9.10
uname -a = Linux XXXX 2.6.31-16-generic #52-Ubuntu SMP Thu Dec 3 22:07:16 UTC
2009 x86_64 GNU/Linux
pulseaudio --version = pulseaudio 0.9.19
References:
http://pulseaudio.org/wiki/Modules#module-suspend-on-idle
http://pulseaudio.org/wiki/FAQ#HowdoIrecordstuff
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
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Parec does not record the silence when capturing the combined.monitor device
https://bugs.launchpad.net/bugs/494072
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