[MEncoder-users] new doom9 codec comparission

[Rich Felker]

On Fri, Dec 09, 2005 at 01:03:00AM +0100, Matthias Wieser wrote:
> Am Donnerstag, 8. Dezember 2005 18:21 schrieb Rich Felker:
> > On Thu, Dec 08, 2005 at 02:12:10PM +0100, Matthias Wieser wrote:
> > > Hi,
> > >
> > > Am Donnerstag, 8. Dezember 2005 02:55 schrieb Corey Hickey:
> > > > Matthias Wieser wrote:
> > > > > This might be of interest:
> > > > > http://forum.doom9.org/showthread.php?s=&threadid=61128
> > > >
> > > > That is indeed interesting. I skimmed the thread, and also found
> > > > some pictures and numbers:
> > > >
> > > > http://www.cns.nyu.edu/~zwang/files/research/quality_index/demo_len
> > > >a.ht ml
> > > >
> > > > Is there any implementation that works on Linux?
> > >
> > > Unfortunately I'm not aware of any Linux implementation.
> >
> > best and easiest way to use this would just be to add it to lavc.
> 
> Maybe an external implementation could be even more powerful because one 
> could additionally investigate the effects of filters and things like 
> that.
> 
> It's comparable to the psnr calculation:
> "-lavc psnr" can only show (for example) if v4mv is good or bad but it is 
> not able to show if one should use "-lavc nr=400" or better "-vf hqdn3d".
> An external implementation which compares the original video file and the 
> recompressed video file can do this.

yes but an external implementation is also much less efficient to use
and not supported by mplayer/mencoder (without first decoding all
frames to uncompressed image files...).

rich