MakeMKV ripping question, how do I know what the main movie is?

[ominous]

I just downloaded MakeMKV yesterday and popped in a blu-ray and it read it great (Shrek if it matters). I unchecked all of the subtitles, chose only the english audio. What confused me was I saw 2 movies that were the same size that had all the same options. They were both about 22GB and I didn't know which one was the main movie or if they split the movie into 2 separate files.

I checked to save both of them and it outputted 2 separate files, one for each, and they're both the same exact movie. Any idea why a blu-ray would have 2 of the same exact 20gb movie inside it or is this a MakeMKV glitch seeing the same movie twice?

[bugmenot]

The same thing happens to me with DVD, I've notice that some time there is 2 movies with same size and same time track,
so my opinion is that this is "normal". Maybe depends from publisher 2 publisher of the movie?

[HeartWare]

It could one of several things, f.ex. two different alternate angles in some scenes, or a version with another default audio or subtitle track (you can only define a default audio/subtitle track for an entire title, but a title can refer to the same video files on the disc, so in order to have two different editions on the disc of the same movie, but with different defaults, they need to include two title definitions to the same video files).

[accident]

It's probably something like an alternative ending or possible extended via bdlive additional footage. Play the disc normal and look at what options there are in extras or menus.. IIRC I am legend is a good example of what appears to be the same movie twice but it's the 2 different endings that make it different.

I'm unfamiliar with makemkv, does it actually show you the contents of the playlist? it'll be a list of files and you'll be able to see which files are different between the 2 to directly play those files to see what's different.

[plm]

Also, some are duplicates with the segments in the wrong order to try to foil copying.

It's trial-and-error and experience really. But this list can also help to identify the track you're looking for when it's not obvious:
http://www.avsforum.com/avs-vb/showthread.php?t=1155731