On 02/08/2013 07:19 PM, Carl Eugen Hoyos wrote:
You should use multi-threading if you want to decrease overall decoding time, if you need minimal cpu usage, force -threads 1 (multithreading always has an overhead).
Additionally, multithreading introduces a decoding delay of (number of threads) frames - e.g., if you use 4 threads, the earliest time you'll get your frame out is when you feed in the 5th. If you're decoding from a file, that makes no difference - however, if you're showing a live stream at (say) 15 fps, then a 4 frame delay = ~300ms which is very noticeable - in this case you would also want to disable threads.
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