[MPlayer-dev-eng] [PATCH] dvdnav part 3 - emptyframe

[Michael Niedermayer]

Hi

On Tue, Jul 31, 2007 at 11:17:27AM +0200, Reimar Döffinger wrote:
> Hello,
> On Tue, Jul 31, 2007 at 12:05:22AM +0200, Diego Biurrun wrote:
> [...]
> > libmpeg2 used to be faster than FFmpeg.  The last time I made benchmarks
> > years ago this was indeed still the case, but FFmpeg was catching up.
> > Baptiste keeps telling me that FFmpeg is faster nowadays, but we really
> > need extensive benchmarks to confirm or deny this.
> 
> Just yesterday I was shocked to see that ffmpeg12 + vo_gl on Windows is
> about 30% slower than libmpeg2 + vo_gl.
> Probably I am doing something stupid in vo_gl (I guess that with
> PCI-Express slice-based rendering becomes very slow in comparison), but
> it still is a huge difference.

uhm ... 30% ...

it would be interresting to know what exactly causes this speed difference

here libmpeg2 is 10% slower than ffmpeg12 with the matrixbench video and
-vo null as well as -vo xv
(-vo gl is around 1 fps so it would take hours to test and might be hard
to interpret the result due to overhead ...)
cpu:amd duron

could you try -vo null / xv ? and try with matrixbench_mpeg2.mpg or provide
the video you used?

also dont use windows :)
there might be alignment issues on windows which could cause significant
slowdown ...

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The greatest way to live with honor in this world is to be what we pretend
to be. -- Socrates
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