2025-04-11, 05:04 PM
The TS container (which is what is used when that is unchecked) does not support AV1. If you have a AV1 video that only required remuxing, and the client supports AV1, it would then have to be transcoded. OR if you have a server that supports AV1 encoding, AV1 as the codec transcoded TO wouldn't be an option.
I don't recall if TS also restricts what audio codecs are used.
I don't recall if TS also restricts what audio codecs are used.