Bug#467507: compiz: Prevents frame grabbing from v4l device (tv tuner)

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Daniel Dickinson wrote:
> Package: compiz
> Version: 0.6.3~git20071222.061ff159-1
> Severity: normal
>
>
> Having compiz active results in blank video using ffmpeg (both lenny and experimental) for a/v recording.  Not starting compiz as the window manager (but the package is still on the system) and sticking with metacity restores the desired functionality (recording tv) to ffmpeg.
>
> The ffmpeg command-line I use (for the experimental ffmpeg, lenny uses audio_device instead of oss) is:
>
> /usr/bin/ffmpeg -y -tvstd ntsc -t "$TOTALSECONDS" -s 480x352 -re -deinterlace -f video4linux2 -i /dev/video0 -f oss -i /dev/dsp -ac 2 -s 640x480 -f mpeg -vcodec mpeg1video -acodec mp2 "$BASEFILENAME.mpeg"
>
> with totalseconds and basefilename filled in, of course
>   

I have no idea what the above line exactly does. Is it just recording
what's coming from a digital camera plugged on /dev/video0 ? Or is there
anything recorded that comes from a window on the screen ? Compiz
changes the way things a displayed (applications render offscreen and
Compiz composite them back to screen).

Brice