Media Containers
The Mastroka Media Container is an open source, open standard multimedia container that is heavily used in the fansubbing scene. Mastroka video, or .mkv
files are the standard for soft-subbed releases as they allow for multiple subtitles tracks and chapters which are a somewhat unique feature to the container. The MPEG-4 Part 14 or MP4 is another container format but it is limited in its usefulness for fansubbing.