When upgrading to 5.10, the new and improved transcode system is automatically used. The old transcode system can still be used in 5.10 but will be deprecated in later releases.
In relation to this, there are a few things to be aware of.
EXIF
In previous version of the old transcode system, it was possible to embed EXIF metadata in the generated renditions/transcodes. This is not supported in the new transcode system.