Bad/pixelated quality

[olanwe]

There is also a bug in the Jellyfin server limiting the maximum transcoding bitrate to the original source-bitrate, so transcoding more efficient codecs into less efficient ones (like HEVC to H.264) will always result in worse quality (as H.264 requires more bandwidth for maintaining the same picture quality).
Jellyfin versions without this bug (up to 10.8.9) used a higher bandwidth in such cases.
This bug has already been fixed in the master, so it will be fixed in 10.9.
(See https://github.com/jellyfin/jellyfin/pull/9738 )