[FFmpeg-user] ffmpeg/libx264 thread management

dE . de.techno at gmail.com
Thu Feb 9 09:32:56 CET 2012

On 02/07/12 17:45, Tim Nicholson wrote:
> I have noticed that when ffmpeg is allowed to do its own thing and 
> create subthreads it creates those subthreads with a nice value of 0, 
> as per the master thread. However if performing a libx264 encode, 
> these threads are niced up to 10. This means I end up with lots of 
> threads but still no maxed out CPU. I can run 2nd and 3rd transcodes 
> and each one runs at the same speed as the first to max out the cpu, 
> but how can I max out the CPU for just the one?
> Manually upping the thread count just increases the kernel cpu load as 
> it tries to manage all the threads without increasing throughput...

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