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

[Reimar Döffinger]

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