[LAU] screencast using jack

[Federico Bruni]

Il 18/03/2013 00:10, David Adler ha scritto:
>>> 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.
>> >
>> >I had to replace "-vpre lossless_ultrafast" with "-preset ultrafast"
>> >and "-i 0:0" with "-i :0.0".
> Thanks for posting, that does it here as well.

I have another issue with the tutorial above.
It says:
"Now you have two separate files, an .mkv and a .wav file and because 
jack_capture was started right after ffmpeg audio should be no more out 
of sync then just a few millisecs."

Actually my files are out of sync because they have different durations.
Video is 5:31 and audio is 9:21.

Why?