Hypothetically, whats the minimum sustained download speed you'd need to stream . .

[Bateluer]

a BluRay movie, at maximum visual quality, with maximum surround sound options and quality, with less than 5 seconds of initial buffering?

Old acquaintance of mine is telling that his standard Cox cable line is fine for streaming BD. I think he's grossly overestimating it.

 

[rcpratt]

5-7 MB/s, maybe? With compression, maybe 1-1.5 MB/s, but that's not what you asked.

 

[vi edit]

48 Mbs + overhead

 

[Bateluer]

5-7 MB/s, maybe? With compression, maybe 1-1.5 MB/s, but that's not what you asked.

That seems low. And yes, not worried about compression for this. Yet.

 

[Bateluer]

48 Mbs + overhead

This seems more in line with what I read here.
http://www.blu-ray.com/faq/#bluray_vs_dvd_comparison

 

[rcpratt]

This seems more in line with what I read here.
http://www.blu-ray.com/faq/#bluray_vs_dvd_comparison

We gave, like, the exact same answer.

 

[Beev]

a BluRay movie, at maximum visual quality, with maximum surround sound options and quality, with less than 5 seconds of initial buffering?

Old acquaintance of mine is telling that his standard Cox cable line is fine for streaming BD. I think he's grossly overestimating it.

The fact that he has Cox means he has some of the worst internet you can possibly have. Cox can go to hell.

 

[vi edit]

We gave, like, the exact same answer.

Yeh 48 Megabits/sec is the same as 6 MegaBytes a second. But cable providers usually rate in the former instead of the later because the numbers look bigger.

 

[DominionSeraph]

What's "standard"?
If it's ~10Mb/s, you could get the audio...

 

[Arkaign]

Uncompressed BD tops out at 54Mbps, but truth be told, you need more overhead given the nature of how the internet works. The internet streams from Netflix are very low res, but just go and try to run one on a 768k DSL line. It is well under 768k/sec for a non-HD stream with lots of compression like they use, but you need a lot of breathing room to keep the thing flowing correctly.

I think they could reasonably get a 1080p stream that was very low compression along with 8 quality HD audio channels into around 15Mbps, but you'd need at least a 30% higher bitrate connection to ensure smooth playback. BD's have drastically different bitrates as well. But I'd say that they seem to average in the 20Mb uncompressed range.

http://forum.blu-ray.com/blu-ray-movies-north-america/3338-blu-ray-movie-bitrates-here.html

Basically if you had anything less than a 25Mb connection, streaming raw BluRay would be completely ludicrous. Due to latency issues and the general crappiness of the internet quality, I'd say it might be problematic even with an OC-192. Why? You can't depend on every hop across the internet to deliver such massive speeds. For a simple single connection to some internet resource, you're bouncing across TONS of equipment, not all of which is either all that fast, or is tuned to allow a single connection to suck up more than X amount of bandwidth (see QoS), or isn't already being saturated by other users, etc.

 

[rcpratt]

I think they could reasonably get a 1080p stream that was very low compression along with 8 quality HD audio channels into around 15Mbps, but you'd need at least a 30% higher bitrate connection to ensure smooth playback. BD's have drastically different bitrates as well. But I'd say that they seem to average in the 20Mb uncompressed range.

I stream ripped BDs from my computer to my PS3 at 15-20 Mbps and it's indistinguishable to me. So some compression is fine.

 

[Arkaign]

I stream ripped BDs from my computer to my PS3 at 15-20 Mbps and it's indistinguishable to me. So some compression is fine.

Yeah I agree largely. You have to be suuuuper picky and have extreme equipment to really tell the difference with minor compression like that.

 

[Arkaign]

And besides, regardless of the hype, BD's are already compressed, or at least 99% of them are IIRC. And then there's the question of the source and processes they used (film transfers, equipment they used to do the transfer, whether they used edge correction, whether they used Mpeg2, VC-1, AVC, all kinds of BS details like that). It's why it's kind of important to look at the reviews on the AV nerd sites that really give a good objective rating on the quality of various BluRay titles. Some of them are almost as bad as a regular DVD, some are plain awesome, and many are in between.

 

[epidemis]

A BD is - what - 15 GB? Say a 2 hour movie would take 15*8/(2*3600) = 0.0166 Gigabits or
a 16 Megabit connection

The 25 GB cited is just the capacity with extra features and what not, I stand by my estimate.

 

[rcpratt]

A BD is - what - 15 GB? Say a 2 hour movie would take 15*8/(2*3600) = 0.0166 Gigabits or
a 16 Megabit connection

Often 30 GB, sometimes 40 GB.

 

[Arkaign]

A BD is - what - 15 GB? Say a 2 hour movie would take 15*8/(2*3600) = 0.0166 Gigabits or
a 16 Megabit connection

The 25 GB cited is just the capacity with extra features and what not, I stand by my estimate.

Yeah the sizes vary too much to have that make sense.

Eg :

The primary MT2S or whatever (the main movie files) are as following for these films :

Man on Fire - 33.6GB
Enemy of the State - 16.9GB
Hitman - 12.1GB
Hunt for Red October - 33.1GB

It varies soooo much.

 

[mnewsham]

Amazon instant stream recommends 3.5Mb/s for 720P HD content, that is with 2.1 sound. So i could see a 1080p Bluray with 7.1 surround sound hitting 30Mb/s+

 

[ViRGE]

Yeah the sizes vary too much to have that make sense.

Eg :

The primary MT2S or whatever (the main movie files) are as following for these films :

Man on Fire - 33.6GB
Enemy of the State - 16.9GB
Hitman - 12.1GB
Hunt for Red October - 33.1GB

It varies soooo much.

And BluRay isn't encoded at a constant bitrate. They use a variable bitrate (up to 54Mbps as mentioned) to maximize the quality within the confines of a 25GB/50GB disc.