[FFmpeg-devel] Some footage for H264 on kdenlive.org
Carl Eugen Hoyos
Wed Feb 25 09:29:35 CET 2009
Loren Merritt <lorenm <at> u.washington.edu> writes:
> > I severely doubt there is any processor where multithreaded h264 decoding
> > will make the difference between usable and non-usable, except that the user
> > may then use deblocking on B-frames while editing in real-time where he has
> > to live with P frames without loop-filter currently.
> You doubt there's a processor that gets more than 2x speedup from multithreaded
> h264 decoding? On the contrary, if you don't get nearly 4x on a quadcore,
> you're doing something wrong. Because h264 decoding does have 4x parallelism
> possible, and it does not require duplicating any computations.
I thought there is always a small overhead when doing multithreaded
calculations, but I trust your judgement.
> Granted, any quadcore is probably also fast enough that it doesn't need
> multithreading in order to decode in realtime, is that the question?
Yes, thank you, that was what I tried to say.
Does current FFmpeg really compile on future quad-core MIPS processors?
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