Collapse multiple, redundant composer process methods

Steps to reproduce

The composer encoder engine contains multiple methods dealing with the process of encoding of video files using FFmpeg. Ultimately, what all of these do is to take a number of input files, execute an FFmpeg process and return a set of output files. They just do it slightly differently. We could easily use one method for all encoding processes, avoiding code duplication.

Fixed and reviewed


Lars Kiesow


Lars Kiesow


Cosmetic Issue