On Mon, Jul 07, 2008 at 02:48:55PM +0200, A Mennucc wrote:
> On Mon, Jul 07, 2008 at 10:41:46AM +0200, Michal Suchanek wrote:
> > On 06/07/2008, A Mennucc <[EMAIL PROTECTED]> wrote:
> > > also, it is compiled using --enable-debug, so it has -O2 instead
> > >  of -O4
> 
> The reason I did that was that I was expecting some mess when
> I finally would have prepared a version of MPlayer linked
> to external FFMpeg, so a -dbg package would have helped;
> (and indeed a lot of mess happened)
> 
> MPlayer 1.0~rc2-15 is compiled with "-g -O2" instead
> of "-O4 -ffast-math ....".
> 
> I could reverse this flag now; but note that
> this flag affects the code of MPlayer itself, not the code in
> the FFmpeg external libraries (that are out of my reach),
> and AFAIK that code is much more relevant to speed.

I would suggest that you build with the same flags that we use upstream.

> The  set of flags for compiling ffmpeg is quite messy currently;
>  in one single line of  gcc in
>   
> http://buildd.debian.org/fetch.cgi?pkg=ffmpeg-free;ver=0.svn20080206-8;arch=alpha;stamp=1212572490
> I count 4 "-g", two "-O2" and two "-O3" 
> (does this make it "-O2.5" ? :-)

The FFmpeg package is in bad shape currently, it is being built without
processor-specific optimizations on x86.  Thus it is unusably slow.  I
and others have been talking with Reinhard Tartler, who currently
maintains FFmpeg.  A new package should appear soon.  Let's see what
happens then.

Diego



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