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!

[Dave]

Almost double the biggest hd dvd can. And this is not final because BD100 and BD200 are here.

[Musashi]

Originally Posted by Dave

Almost double the biggest hd dvd can. And this is not final because BD100 and BD200 are here.

I thought those didn't work in today's players.

In any event, how much time of playback on a BD50 depends on the bitrate used. The minimum that's been used for 1080p hi-def is about 13Mbps using AVC codec + 640kbps for a 5.1 (lossy) Dolby Digital track. That would yield...50,000*8/(13.64*60) = 488 mins, or 8:08. Practically speaking, HD material benefits from using a higher bitrate. If you were to use the full bandwidth every second, there would be room for about 2 1/4 hours of HD video with lossless audio.

Most movies use something in between these 2.

[XanderAE]

Originally Posted by Musashi

I thought those didn't work in today's players.

In any event, how much time of playback on a BD50 depends on the bitrate used. The minimum that's been used for 1080p hi-def is about 13Mbps using AVC codec + 640kbps for a 5.1 (lossy) Dolby Digital track. That would yield...50,000*8/(13.64*60) = 488 mins, or 8:08. Practically speaking, HD material benefits from using a higher bitrate. If you were to use the full bandwidth every second, there would be room for about 2 1/4 hours of HD video with lossless audio.

Most movies use something in between these 2.

I think i see what you're saying. So with the 6 episodes of Smallville per Blu-ray 50GB disc (252 minutes) encoded with VC-1, with 640kbps Dolby Digital 5.1 audio (confirmed on highdefidgest.com,) we can expect quite a high bit rate? I'm kinda hoping 20+Mbps average, otherwise i fear there would be repercussions... image-wise.

[Canada]

I hear that a 50 gig Blu-Ray could hold a three of the extended editions of Lord of the Rings (DVD tranfers) plus all the extras. Hey isn't that only about 30 gigs of DVD's. I figured them out being 5 gig disks, arn't DVD's smaller at around 4.6 or 4.7 gigs?

[Deciazulado]

Originally Posted by XanderAE

I think i see what you're saying. So with the 6 episodes of Smallville per Blu-ray 50GB disc (252 minutes) encoded with VC-1, with 640kbps Dolby Digital 5.1 audio (confirmed on highdefidgest.com,) we can expect quite a high bit rate? I'm kinda hoping 20+Mbps average, otherwise i fear there would be repercussions... image-wise.

taken and modified from Gary:

BD 50 GB

50 GB = 400 Gb = 400,000 Mb

252 minutes x 60 seconds = 15,120 seconds

400,000/15,060 = 26.46 Mb/s

DD 5.1 640 kb/s = 0.64 Mb/s

So:


26.46 Mb/s - 0.64 Mb/s = 25.82 Mb/s VC-1


Counting overhead and other detritus it still comes out around 23 Mb/s which I think it's fine for 1.78

[richteer]

Yeah, assuming Warner actually fills the BD50 discs to capacity. Let's hope they didn't just take the HD DVD encodes and stick 'em on a BD...