[FFmpeg-devel] manually hacked configure options increase h264 decoding speed significantly

Michael Niedermayer michaelni at gmx.at
Thu Oct 20 14:13:42 CEST 2011

On Thu, Oct 20, 2011 at 02:05:19PM +0200, Reimar Döffinger wrote:
> On 20 Oct 2011, at 12:10, Michael Niedermayer <michaelni at gmx.at> wrote:
> > On Thu, Oct 20, 2011 at 11:56:59AM +0200, madshi wrote:
> >>> 2011/10/20 Michael Niedermayer <michaelni at gmx.at>
> >>> a patch that autodetects their availability in configure
> >>> and uses them in mem.c if available is welcome
> >> 
> >>> The existing autodetection has to be fixed, and its a
> >>> bit hard for me to do this without a mingw system to
> >>> test. Could you look into why it fails ?
> >> 
> >> I wish I could do these things. Unfortunately I'm a
> >> mingw noob and haven't really looked into how the whole
> >> ffmpeg configuration system works at all. So I wouldn't
> >> really know where to start. I'm sorry...  :-(
> > 
> > for the configure side, it just tries to compile, link and run:
> >    (this needs -O3)
> It should also need -fomit-frame-pointer,

right, ive not thought about x86_32

> and it makes more sense to just look in config.log which options were used and why it failed.

yes, my thought was a bit that it might be easeier to build a working
test outside configure first

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

While the State exists there can be no freedom; when there is freedom there
will be no State. -- Vladimir Lenin
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