[FFmpeg-user] ffmpeg x265 on multi-cpus

fred fred fr1d_mail at yahoo.fr
Mon Apr 10 15:59:40 EEST 2017

hello Harald, it is not a conclusion, it's an expectation ! and a question : for one file from some format to x265, what it the best efficient way to use my 24 cores ? can you contribute ?BestFred

    Le Lundi 10 avril 2017 14h54, Reindl Harald <h.reindl at thelounge.net> a écrit :


Am 10.04.2017 um 14:43 schrieb fred fred:
> thank you Moritz !
> anyway, even with -threads 0
> x265 [info]: Thread pool created using 24 threadsx265 
> I see with top command between 400% - 500% CPU on ffmpeg ... 
> I was expected like 2400% or 24 ffmpeg workers with 100%

how did you come to the conclusion that parallelization scales magically 
and with no limits? if that would be realistic just throwing enough CPU 
cores on whatever problem would be the soplution - but that is not how 
computers are working
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