[FFmpeg-devel] [PATCH] Implement PAFF in H.264

Balatoni Denes dbalatoni
Thu Sep 20 02:30:37 CEST 2007


Thursday 20 September 2007 01:30-kor Neil Brown ezt ?rta:
> When I use 2 or more threads, it says
> [h264 @ 0xa64920]Cannot parallelize deblocking type 1, decoding such frames
> in sequential order
> so maybe the file always uses deblocking type 1 (??).

You can give -fast to ffplay ...

> So ffmpeg is about 6 times better than the reference decoder (which is
> fantastic), but still 2.5 times worse than real-time.  So even if the
> deblocking could be parallelised, I would need a 30% faster CPU, or
> a third core, or a 30% improvement in the code.

... and then overclock your core 2 to 3 GHz (virtually all core 2s will run 
well with that much overclock, it only depends on your motherboard 
really) ...

> I guess it will be a little while longer before I get real-time
> decoding.  But I am still very happy with this improvement.

... and voila real-time decoding ;)

> Thanks,
> NeilBrown


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