Laserschwert said:
Do MKVs support multi-angle video tracks? I suppose it would be fairly easy to realize something like that in a container format like MKV... that way you could include multiple crawls and Greedo subs, at least in the MKV.
For the Blu-ray (and DVD, respectively) this is probably much more difficult, as I haven't seen a single fanmade disc that contained multi-angle. I'm only familiar with Adobe Encore for authoring discs and it STILL doesn't support multi-angle.
What you are probably looking for the MKV is "Ordered Chapters". You have to create one continuous video stream which includes all editions you want to use, f.e different opening crawls. The different editions are then selectable in your players menu. Unfortunately there's a pretty severe disadvantage: Only two splitters support that feature so far, namely Haali Media Splitter and the preferable AV Splitter (not LAV Splitter!). When using other splitters or some kind of hardware player such as WDTV the file will play as if the different editions didn't exist. I'm also not sure if there's a way so that the correspondent audio and subtitle streams would play automatically.
Bluray has a similar feature called "Seemless Branching". In contrary to the MKV, the alternate scenes are in seperate m2ts files. Edition selection is done via playlists and the main menu. There are several commercial disc with this feature enabled, f.e. Avatar and Gladiator.