[FFmpeg-user] -threads option has no effect

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Aug 12 13:23:23 CEST 2014

Claudiu Rad-Lohanel <jazzman <at> misalpina.net> writes:

> ffmpeg -i <my file.avi> -threads <number of threads> ... <output>

This is of course not sufficient since for decoding, 
threads also defaults to the number of cores and 
decoding can be the more time-consuming factor 
(depending on codecs and settings):
$ ffmpeg -threads 1 -i input -threads 1 ... output

Carl Eugen

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