[FFmpeg-user] How does ffmpeg decides how many threads to use for vmaf

[tarun singhal]

I have specified thread count as 32

For 20 min video duration - I was able to get 1x speed

But for 2.2hr video duration it took 12 hrs, hence lesser speed using same
ffmpeg command and same underlying infrastructure


Hence I am curious, What are the factors which helps ffmpeg decide how many
threads to use for a particular vmaf processing


Thanks

Tarun