New comment by BlitDev on void-packages repository

https://github.com/void-linux/void-packages/issues/46823#issuecomment-1784039300

Comment:
> Is there a reason why you can't/don't want to use libsvtav1 instead?

I've tried to set the crf parameter, but it threw an error:
```
Codec AVOption crf (Select the quality for constant quality mode) specified for output file #0 (test-3.mkv) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
```

My command: ```ffmpeg -i source.mkv -c:v libsvtav1 -crf 30 test-3.mkv```
The crf is actually set at 50 (default value) although I set it at 30.