[FFmpeg-devel] Does i686 have MMX?

[Daniel Verkamp]

2010/8/26 M?ns Rullg?rd <mans at mansr.com>:
> Jason Garrett-Glaser <darkshikari at gmail.com> writes:
>
>> The issue is simple:
>>
>> 1. ?People use --cpu on x86 to mean "it should run on at least this
>> CPU, and contain optimizations for all better CPUs".
>
> Are you aware of the contradiction in that statement?

It's not contradictory if all optimized functions requiring features
beyond the base --cpu are selected via runtime CPU detection.  Whether
this is the case for all optimizations in all of FFmpeg is another
story.