2024-02-18, 03:34 PM
(2024-02-18, 09:18 AM)Iacov Wrote: could it be that audio is also transcoded and that taxes the cpu?
It's almost certainly the case the audio is getting transcoded and using your CPU to do so. If its encoding to AAC its probably using libfdk_aac which in the past was only single threaded (still is?) which is why you're seeing 25-30% cpu usage (1 of the n100 cores).
Here is my 5900x cpu usage when transcoding a 4K movie, although my Intel Arc is doing the video work, the cpu still needs to do the audio/muxing portion and maxes a single core for approx 3 mins (for a 1h10m movie) - https://imgur.com/a/cpt46YA