[Libav-user] multi-thread decoding
Carl Eugen Hoyos
ceffmpeg at gmail.com
Mon Oct 24 11:49:35 EEST 2016
2016-10-24 7:26 GMT+02:00 YIRAN LI <mrfun.china at gmail.com>:
> I'm researching the impact multi-thread decoding may have on memory usage.
> Does anyone know if enabling multi thread decoding will use more memory ?
Multi-threaded decoding can be more memory-consuming than single-threaded
decoding, FFmpeg developers do not agree whether this is unavoidable or a
disadvantage of our implementation.
> (so that more threads used, more memory required?)
> I tried to decode an H.264 encoded 4K video using command:
> ffmpeg.exe -v error -i a.mp4 -threads 0 -f null - 2>error.log
How did you encode the H.264 input file?
Test with eight reference frames and yuv 4:4:4.
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