[LAU] screencast using jack

[David Adler]

On Sat, Mar 16, 2013 at 11:30 PM, Federico Bruni wrote:
> Il 16/03/2013 23:12, Federico Bruni ha scritto:
>
>> I'm trying to figure out how to make a screencast using jack.
>> I have a microphone connected to a firewire soundcard.
>>
>> I've already excluded recordmydesktop, at least for the audio track,
>> because of this bug:
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=649824
>>
>> "recordmydesktop: Specifying --use-jack makes recordmydesktop exit with
>> a bad screen geometry"
>>
>> recordmydesktop works fine if run without --use-jack. I may use it for
>> video only. What about audio?
>> I'm trying jack_capture, which seems nice but I can't make it work: the
>> .wav file generated is mute.
>>
>> Can you help me?
>>
>> Thanks
>
>
> Actually jack_capture can record the "internal" audio, like Ardour playback.
> The mic recording is not working.
> I guess that it's a problem with ports...
>
> The thing is I need to record audio both from mic and from system (Ardour
> playback).


Use  'jack_capture -mc', then manually establish connections.
(see 'jack_capture --advanced-options')

http://apps.linuxaudio.org/wiki/screencasttutorial
might also be helpful. The ffmpeg command will likely demand some love,
for adapting its arguments to what suits your machine.


best,
 d