How much can 50GB Blu-ray hold?

[XanderAE]

I've tried searching for the answer on the Internet, and on here, but I seem to be getting varied results. I'm hoping someone on here can help me and give me a definitive answer...

With a 50GB Blu-ray disc, and today's VC-1 encoding, how much total content can it hold, with a Dolby Digital 5.1 Track?

I read that a 50GB disc can hold 190 minutes of HD media at one place... Can someone please confirm or deny this, maybe tell me precisely?

I ask, because I'm wondering about the newly announced Smallville Season 6 Blu-ray set, that will have upto 6x42 minute episodes on a disc (totalling roughly 252 minutes) and want to know if compression will be severely hindered by the large amount of content.

Thanks in advance!