17 Nov
2012
17 Nov
'12
9:58 p.m.
On 17/11/12 13:33, Atte wrote:
Hi
I'm trying to capture a screencast of a jack2 client (renoise), but it
seems recordmydesktop and jack2 doesn't work well together. Anything I
should do different? Any alternative to recordmydesktop that I should
try instead?
For me screen-capturing with jack seems terribly broken at the moment...
jack capture with (gtk)-recordmydesktop is broken since at least 1 year,
and seems related to the funky width and height values reported when you
use it with jack.
I had an ffmpeg (and newer avconv) script which worked very well until a
few months ago which is now also broken on my system (debian wheezy):
ffmpeg -f jack -ac 2 -i ffmpeg -f x11grab -r 30 -s 1280x800 -i :0.0
-acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 0 output.avi
Adapded from some blog online I can't recall. Actually it seems the X11
grabbing part is broken there, as recording a wav file through jack works.
I had tried gstreamer, but couldn't really get it to work (audio was
stuttery).
Lorenzo.
I'm running ubuntu 12.10...
atte@blokhus:~$ jackd --version
jackdmp 1.9.9
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2012 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
jackdmp version 1.9.9 tmpdir /dev/shm protocol 8
atte@blokhus:~$ recordmydesktop --version
recordMyDesktop v0.3.8.1
atte@blokhus:~$ recordmydesktop --use-jack renoise:output_01_left
renoise:output_01_right
Initial recording window is set to:
X:-27984 Y:0 Width:29008 Height:768
Adjusted recording window is set to:
X:-27984 Y:0 Width:29008 Height:768
Your window manager appears to be Xfwm4
Detected compositing window manager.
Reverting to full screen capture at every frame.
To disable this check run with --no-wm-check
(though that is not advised, since it will probably produce faulty
results).
Initializing...
jack_client_new: deprecated
Capturing!
Failed to obtain Shared Memory segment!