[mythtv-users] ffmpeg and multiple CPUs. Was: Should I be switching to 0.21?
yan at seiner.com
Mon Apr 14 17:36:20 UTC 2008
> On Mon, Apr 14, 2008 at 1:07 PM, Tom Dexter <digitalaudiorock at gmail.com>
>> However...and this is the interesting part...if I use ffmpeg but
>> switch the number of CPUs to 1 instead of 2 the performance of the two
>> is virtually identical. It seems that, at least with my
>> hyper-threaded 3 Ghz P4, ffmpeg works much better with a single core.
> That is interesting. I wonder if the same applies for AMD chips?
> IIRC, the on-screen documentation recommends not using libmpeg2 with
> 64-bit processors, but I may be incorrect.
I've played a bit with ffmpeg as a standalone package. ISTR that
threading is only enabled if the codec supports it; I don't think mpeg*
supports threading with ffmpeg.
Windows is like a canary in a coal mine, it's the first thing to die on
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