[Libav-user] Maximize CPU usage when decoding h264
Carl Eugen Hoyos
cehoyos at ag.or.at
Mon Mar 24 14:59:53 CET 2014
Winter Fa <winterfa at ...> writes:
> My question is what factors are affecting the CPU usage of decoding h264
(Many, among them cabac vs cavlc, B-frames, bitrate and probably less
obvious things. There is a x264 option that takes this into account iirc
but it may not suit your use case.)
> Is there a way to maximize CPU usage so that decoding can become faster?
Intra-only streams allow to use much more CPU while decoding.
Is your use-case to decode as many files as possible in a given time
or to decode one file as fast as possible? If you have many files,
-threads 1 is significantly more effective (up to the bandwidth of
your hard disk).
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