[FFmpeg-user] Picture jerky when screencasting?

Etienne Buira etienne.buira.lists at free.fr
Thu Jun 2 10:12:43 CEST 2011


On Wed, Jun 01, 2011 at 03:42:10PM -0700, lugoteehalt wrote:
> 
> Etienne Buira wrote:
> > 
> >> [libx264 @ 0x9b558e0] --psnr used with psy on: results will be invalid!
> > 
> > Not in my libx264-lossless_ultrafast.ffpreset, you should check where
> > ffmpeg will search for them.
> > Please try the same with a genuine ffpreset before tweaking.
> > 
> >> [libx264 @ 0x9b558e0] --tune psnr should be used if attempting to
> >> benchmark
> >> psnr!
> >> [libx264 @ 0x9b558e0] interlace + weightp is not implemented
> >> FastShuffle Cache64
> >> [libx264 @ 0x9b558e0] constant rate-factor is incompatible with 2pass.
> > 
> > Ditto * 3
> > 
> > _______________________________________________
> > ffmpeg-user mailing list
> > ffmpeg-user at ffmpeg.orgT
> > 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).


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