[FFmpeg-user] Picture jerky when screencasting?

[Etienne Buira]

On Thu, Jun 02, 2011 at 09:34:14AM -0700, lugoteehalt wrote:
> 
> Etienne Buira wrote:
> > 
> > 
> >> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >> > 
> >> 
> >> Thanks.  Completely new to ffmpeg, bit mystified.  Is this at all
> >> helpful?
> > 
> > Hi
> > 
> >> ffmpeg -f alsa -ac 2 -i pulse -f x11grab -s `xdpyinfo | grep
> >> 'dimensions:'|
> >> awk '{print $2}'` -r 25 -i :0.0 -fpre
> >> /usr/local/share/ffmpeg/libx264-lossless_ultrafast.ffpreset -sameq
> >> out.mpg
> >> Output #0, mpeg, to 'out.mpg':
> >>     Stream #0.0: Video: mpeg1video, yuv420p, 1360x768, q=0-69, pass 1,
> >> pass
> >> 2, 200 kb/s, 90k tbn, 25 tbc
> > 
> > Your preset file contains well more things than it should, please use an
> > unmodified one. (deleting it, reinstalling, comparing with the one
> > checked out in your tree or whatever).
> Thanks.  Compiled ffmpeg myself:
../..

So, is your /usr/local/share/ffmpeg/libx264-lossless_ultrafast.ffpreset
an exact copy of the original preset (that you can find in your git tree or here:
http://git.videolan.org/?p=ffmpeg.git;a=blob_plain;f=ffpresets/libx264-lossless_ultrafast.ffpreset;hb=HEAD)?
If not an exact copy, make it one.
If you still have same trouble after that, check that the loaded preset
is actually the one you think (strace can help).