Re: [gentoo-amd64] Ffmpeg Emerge Problem

[Mark Knecht]

On Tue, Mar 10, 2015 at 5:27 PM, Frank Peters <frank.peters@×××××××.net> wrote:
> On Tue, 10 Mar 2015 17:17:11 -0700
> Mark Knecht <markknecht@×××××.com> wrote:
>
>>
>> I've had no problems, as best I can
>> tell, with ffmpeg and these settings.
>>
>
> Well, if the use of the mmxext flag leads to instructions in
> the compiled code which the cpu does not have, then CRASH.
>
> But the SSE instruction sets supersede MMX (and mmxext) and so the
> mmxext flag is really unnecessary on Core i7 and many newer processors.
> (Ffmpeg may have reasons for still using MMX but I don't know.)
>
> Frank Peters

True, but I don't think it's likely as the old mmxext flags (AMD only
possibly?) became a subset of SSE. That said, report the bug and copy
us on the report. I'd be interested in hearing what the developers
say.

Cheers,
Mark