[MPlayer-dev-eng] Make ffmpeg MPEG1/2 decoder the default?

[Rich Felker]

On Mon, Feb 18, 2008 at 06:17:42PM +0100, Diego Biurrun wrote:
> On Mon, Feb 18, 2008 at 06:12:29PM +0100, Reimar Döffinger wrote:
> > On Mon, Feb 18, 2008 at 10:18:38AM +0100, Diego Biurrun wrote:
> > > On Sat, Feb 16, 2008 at 03:38:36PM +0100, Reimar Döffinger wrote:
> > > > libmpeg2 may be still slightly faster (though probably not on the newer CPUs),
> > > > but it is quite crash-happy and otherwise buggy (see also 34582.mxf in
> > > > incoming).
> > > > Thus I am for making FFmpeg decoder the default, any objections?
> > > 
> > > I'm not too convinced of this since libmpeg2 was still faster the last
> > > time I tried and now we have a pending patch with further speedup.  I
> > > propose running benchmarks on many different CPUs instead.  Let's find
> > > out which one really is the fastest.  Maybe we can motivate somebody to
> > > try making FFmpeg speedier...
> > 
> > My benchmarks say it completely depends on the CPU, though the speed on
> > the old Athlon would be more relevant in practice (though I doubt that many
> > are still in use).
> 
> Why aren't you using -vo null like we have always done for these
> benchmarks?

Because it hides all sorts of performance data which is relevant. I
care about the performance difference between decoders when memcpy to
video memory and execution of vo code is contending for the cache, not
in some idealized-but-irrelevant environment with no vo.

Rich