I've been having a problem trying to hardware transcode (HEVC video) with image subtitles (PGS and VODSUB).
- With image subtitles and HW transcoding turned on the video lags badly, only using 25% of my CPU power (it seems the problem is that it is limited to one core and I don't know why).
- With image subtitles and HW transcoding turned off the video plays smoothly, but uses ~90% of my CPU.
- For comparison, HW transcoding without subtitles uses about 12% of my CPU.
Turning off HW transcoding is a temporary solution, but then the server is limited to 1 stream at a time.
Has anyone else had this problem/found a solution?
3/26 Edit: just to clarify, I accidentally accepted an answer, but I still have this issue and believe it is a problem that can be resolved if someone would look into it (unless there is some reason for HW transcoding to perform terribly with image subtitles).