Emby is a media server which manages a media collection so the user does not have to do so.
Basis for Feature Request
Part of managing that collection is conversion to modern, appropriate media types that utilise better codecs, better encoding techniques. Presently people do most of this outside of Emby.
The underlying tool being used for conversion is ffpmeg, see attached log. What I would like to see is an Advanced Conversion page which exposes some of these