[Ffmpeg-devel] Bug in multithreaded h/x264 encoding

[Erik Slagter]

On Sun, 2005-06-19 at 13:12 +0200, M?ns Rullg?rd wrote:
> >> > This doesn't work when I specify -threads 2 as well, without it it's
> >> > fine:
> >> >
> >> > ffmpeg -y -i input.vob -aspect 4:3 -g 25 -qscale 6 -bf 2 -coder 1 \
> >> >  -ab 64 -async 1 -acodec aac -vcodec h264 -f mp4 output.mp4
> >> >
> >> > Large parts of the image are completly mangled all of the time. I guess
> >> > it can be reproduced with any input.
> >> 
> >> That's a fairly long command line.  Does the bug still show if you
> >> simplify it a bit, such as disable B frames?  Does the x264 command
> >> line interface work?
> >
> > It's gone when the -coder 1 is removed (CABAC iirc).
> 
> Does the x264 command line work properly?  I can't imagine how the
> lavc wrapper could misbehave with cabac enabled.

Can you tell me what command line options of x264 _exactly_ correspond
to the ones I used with ffmpeg?

Maybe it's the mp4 muxer that messes up?