[mythtv-users] Preserving HDTV AC3 audio stream whilst transcoding

Kyle Rose krose+mythtv at krose.org
Thu Nov 18 15:13:48 UTC 2004


Doug Larrick <doug at ties.org> writes:

> I see this magnitude of difference on a Pentium 4 system between
> libavcodec being compiled with or without -march=pentium4.

I compile everything in myth -march=pentium4 (after first having
tested it with pentiumpro to make sure gcc wasn't b0rk1ng the
optimizations).  Incidentally, xine is *not* compiled with
-march=pentium4, and is still faster.  However, it may have linked-in
optimized assembler codepaths for the architecture it discovers at
runtime.

Cheers,
Kyle


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