[FFmpeg-devel] FFmpeg 0.7.5 is very much slower than FFmpeg 0.7 for decoding [SOLVED]

Reimar Döffinger Reimar.Doeffinger at gmx.de
Thu Oct 6 08:59:37 CEST 2011

On 6 Oct 2011, at 01:11, Dominik 'Rathann' Mierzejewski <dominik at greysector.net> wrote:

> On Tuesday, 04 October 2011 at 18:08, Unga wrote:
> [...]
>> The issue was asm options. 
>> The ffmpeg version 0.7-rc1 was installed with asm options. (manual
>> compilation)
>> ffmpeg version 0.7.5 was installed with asm options disabled!
>> (FreeBSD port system)
> Please ask the port maintainer to enable runtime cpu detection
> and not disable asm.

The problem is most likely that they can't compile some ASM due to using an ancient (6 years or so old) binutils version, it only works if you install a newer gcc (the default gcc cannot be made to use a different binutils without horrible hacks).
I changed MPlayer to refuse to compile on such broken setups, though I have some doubts it will get the message across (though for FreeBSD 8 binutils are updated at least).

More information about the ffmpeg-devel mailing list