Getting information about a Blu-ray video's format

[ghell]

The following all assumes that the particular disk in question isn't encrypted:

I've read that Blu-ray can use several formats for the actual video on the disk. For example MPEG-2, MPEG-4 and VC-1 (I've also read that a small number of movies are released as 1080i rather than 1080p, and so on).

Is there any way to tell which format has been used on a particular video stream? Also, is there any software out there that can convert movies from a Blu-ray disk to raw YUV (or pull the MPEG-2/4, VC-1, etc stream off onto the hard disk and then convert to YUV from there), for use with something like VC-2 (Dirac) encoding or would this just be pointless if too much information had been lost putting the video stream onto the disk (encoding with MPEG-2/4, VC-1, etc) to even bother trying to re-encode with VC-2?

Thanks