Is Warner screwing up Blu-ray titles because of HD DVD??

[MrVorhees]

Hey there,
i just finished watching the departed on blu-ray some scenes are very sharp and colorfull but then at some moments i was like "hey wtf the image looks very soft" example; scene at 2:12 runtime.

i wasnt sure whats going on (never had some like that on blu-ray before) so i pressed the "select" button on my Ps3 controller to check the birate, and it says "6.8mbps" to maximal 8mbps at this scene.

Now my question is, HOW?? has it something to do because its a warner release and the same transfer as the one on the HD DVD ?
i mean the runtime of that movie is 151 Min, could that be the thing that "the departet" has some scenes with a very low birate? cause they couldnt make it higher cause the 30GB of HD DVD??

before some people here flame on me, i really have NO IDEA why the birate is that low at some scenes, i just ask and try to find the answer here on this forum from the Blu-Ray/HD DVD experts.

Ok i asked the same question on AVS , many people told me it has something to do with the discsize from HD DVD, they couldnt handle constant high birate with 30GB.

HERE YOU GO.

151min = 9060 seconds

encoded at 25MBit/s avg. like you suggested that adds up to 9060*25/8 = 28312.5 MByte / 1024 = 27.65 GByte...

Max. capacity of HD-DVD is 30,000,000 bytes = 28.61 GByte

Now add 1 GB for overhead, 2 GB for ported SD extras, ~ 3GB for the audio tracks (TrueHD @ ~ 2MBit/s avg, 640kbs DD+) and we are already WELL over the max capacity of HD-DVD.

[Blue]

I think they are using 25GB as the constraint (Single layer Blu-ray). Your calculations are a little off as Hard Disk Drives (and I assume Optical use the decimal system not the binary system) so to convert betwen MB and GB a 1000 (not 1024) so that makes it a little better for HD-DVD, but not enough to get excited over. Warner seem to be taking some action to run 2 masters one for Blu-ray and one for that other format hopefully we will see this soon.

You are correct about the assumptions of HD-DVD running out of disc space. In a few posts I have mentioned that any movie over about 110min is going to start to suffer under HD-DVD whilst Blu-ray can go out to about 190 min before sufering the same fate. Many movies are over 110 min, not many are over 190 min though and I would suggest if ou have been watching a movie for over 3hrs to get up and change a disc maybe a very good thing, as you are going to need to get up for mare than just changing a disc.

[CJS234]

Originally Posted by Blue

I think they are using 25GB as the constraint (Single layer Blu-ray). Your calculations are a little off as Hard Disk Drives (and I assume Optical use the decimal system not the binary system) so to convert betwen MB and GB a 1000 (not 1024) so that makes it a little better for HD-DVD, but not enough to get excited over. Warner seem to be taking some action to run 2 masters one for Blu-ray and one for that other format hopefully we will see this soon.

You are correct about the assumptions of HD-DVD running out of disc space. In a few posts I have mentioned that any movie over about 110min is going to start to suffer under HD-DVD whilst Blu-ray can go out to about 190 min before sufering the same fate. Many movies are over 110 min, not many are over 190 min though and I would suggest if ou have been watching a movie for over 3hrs to get up and change a disc maybe a very good thing, as you are going to need to get up for mare than just changing a disc.

I think his calculations of 024 were correct. I think that Warner is just encoding for HD-DVD and then putting the same video on the Blu-ray version? Any takers on my theory?

As for having to get up after 3 hours, I dont have that problem. I happily sat through Return of the King without having to get up once (yes, yes i do want a cookie, gimme gimme gimme)

[blublublu]

Originally Posted by CJS234

I think his calculations of 024 were correct. I think that Warner is just encoding for HD-DVD and then putting the same video on the Blu-ray version? Any takers on my theory?

That's exactly what they do. Same encode for both HD DVD and Blu Ray.