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

[Reimar Döffinger]

Hello,
On Tue, Jul 31, 2007 at 12:16:42PM +0200, Michael Niedermayer wrote:
> On Tue, Jul 31, 2007 at 11:17:27AM +0200, Reimar Döffinger wrote:
> > 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

-noslices fixes it mostly btw. I didn't make proper measurements though.

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

I'll try to find time to debug it properly, I actually only wanted to
test -vo gl.

> also dont use windows :)

I didn't test only Linux yet with the new hardware, so it might or might
not have the same problems.

Greetings,
Reimar Döffinger