2016-10-24 19:49 GMT+11:00 Carl Eugen Hoyos <[email protected]>: > 2016-10-24 7:26 GMT+02:00 YIRAN LI <[email protected]>: > > > 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. > > Hi Carl,
For the test video I used, using -threads 0, -threads 1 and -threads 2 launched 6, 8 and 11 threads (although only 6 active). Does that mean this video actually is always single-thread decoded? (so other 5 threads do other jobs) How can I tell if it's being single-thread decoded or multi-thread decoded? Thanks Carl Eugen > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user >
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