Bug#1008840: linphone: Recording does not work due to lack of mkv support

[Dennis Filder]

X-Debbugs-CC: Rainer Dorsch <ml at bokomoko.de>

On Sat, Apr 02, 2022 at 08:27:19PM +0200, Rainer Dorsch wrote:
> Hmm....I just configured the path for in Settings->User Interface. Can you tell
> where I can configure the file name?

I just looked at the code and the ".mkv" suffix is hard-coded in the
Qt version, so currently there is no way to record in WAV despite
Mediastreamer2 supporting it.  The command line version ("linphonec")
still supports it with the "record" command.  I'll add this to the
list of things to bring up once I get around to discussing bugs with
the upstream developers.

A work-around can be to record straight from the Pulseaudio monitor of
an on-going call (oggenc is part of vorbis-tools):

  pacmd list-sink-inputs # the index for Linphone was 58
  parec --monitor-stream=58 | oggenc -o /tmp/linphone.ogg --raw -

The volume may need to be cranked up quite high.  Working with
Pulseaudio like this can also get somewhat finicky.

Regards