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Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

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Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#51

Post by oldmanjay »

contingencies wrote: post #31

To clarify for all the other non HD-video nerds, this seems to be regarding DCP: https://en.wikipedia.org/wiki/Digital_Cinema_Package not HDCP: https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content... (which is already broken, and was itself the industry response to the breaking of DVD CSS: https://en.wikipedia.org/wiki/Content_Scramble_System ). The use of DCP seems to be limited to very high resolution relea…

I find it amusing that after all these decades people are still willing to claim some sort of moral high ground in defense of their desire for entertainment.

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#53

Post by thaumasiotes »

sillysaurus3 wrote: post #36
contingencies wrote: post #31

To clarify for all the other non HD-video nerds, this seems to be regarding DCP: https://en.wikipedia.org/wiki/Digital_Cinema_Package not HDCP: https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content... (which is already broken, and was itself the industry response to the breaking of DVD CSS: https://en.wikipedia.org/wiki/Content_Scramble_System ). The use of DCP seems to be limited to very high resolution relea…

The point of DRM is to make that time, motivation, and quality equation not make sense. Every day that a new videogame stays off Piratebay is an extra day of full revenue. I'm not defending DRM, but it's important to know one's enemy.

> The point of DRM is to make that time, motivation, and quality equation not make sense. Every day that a new videogame stays off Piratebay is an extra day of full revenue.

This can't be true as written, as long as people expect it to show up there eventually. Every day it stays off piratebay is an extra day of revenue intermediate between full and "already out on piratebay" levels.

The DRM works because the value of these things appears to be greatly time-sensitive -- most of the cost is already getting-it-right-away, which DRM can protect, rather than the fundamental timeless value of the product, which DRM can't protect.

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#54

Post by [deleted] »

thaumasiotes wrote: post #53
sillysaurus3 wrote: post #36

Earlier quoted context omitted.

The point of DRM is to make that time, motivation, and quality equation not make sense. Every day that a new videogame stays off Piratebay is an extra day of full revenue. I'm not defending DRM, but it's important to know one's enemy.

> The point of DRM is to make that time, motivation, and quality equation not make sense. Every day that a new videogame stays off Piratebay is an extra day of full revenue. This can't be true as written, as long as people expect it to show up there eventually. Every day it stays off piratebay is an extra day of revenue intermediate between full and "already out on piratebay" levels. The DRM works because the value o…

[deleted]

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#55

Post by aaron695 »

wyager wrote: post #17
sprocket35 wrote: post #9

Earlier quoted context omitted.

Some of the projectors are connected to the DCP playback server via encrypted HD-SDI. The content is link-encrypted between the server and projector using Texas Instrument's "Cinelink" technology. If the TI "Enigma" module's private key was leaked, this would enable recording the plaintext SMPTE 292M video stream in real-time. The audio is un-encrypted obviously and easy to record, but it is watermarked so they would…

Jesus, they put so much effort into "encrypting" this data when it fundamentally needs to be available in a decrypted format for the users to watch it. At the end of the day, there's always the analog hole (or, more likely, the digital hole between the rendering chip and the MEMS array or LCD or whatever other mechanism lives inside the projector). No matter how many convoluted layers of encryption they throw at thes…

> there's always somewhere you can stick a camera or a few high-bandwidth digital signal analyzers and recover the content with at worst slightly degraded quality

And hence you have a safer product? The exact thing they are trying for?

The objective is to slow down pirate release. Seems to be working exactly as planned.

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#56

Post by taneq »

sillysaurus3 wrote: post #36
contingencies wrote: post #31

To clarify for all the other non HD-video nerds, this seems to be regarding DCP: https://en.wikipedia.org/wiki/Digital_Cinema_Package not HDCP: https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content... (which is already broken, and was itself the industry response to the breaking of DVD CSS: https://en.wikipedia.org/wiki/Content_Scramble_System ). The use of DCP seems to be limited to very high resolution relea…

The point of DRM is to make that time, motivation, and quality equation not make sense. Every day that a new videogame stays off Piratebay is an extra day of full revenue. I'm not defending DRM, but it's important to know one's enemy.

Is that true, though? I'd expect that the people who only download cracked games will wait for the game to be cracked and up for download, no matter how long that takes. The people who download games to trial them and then buy the ones they like will likewise wait until they can give it a shot before potentially wasting money. The last group, those who buy legit copies of games at or near release, are going to buy it no matter what.

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#57

Post by ryandamm »

Yaggo wrote: post #14

The DVD format in NTSC regions has 480 pixel vertical resolution. Even the half-century old NTSC spec has more vertical lines (525). I find it amazing that DVDs are still being sold.

From Wikipedia's article on NTSC:

"483 scan lines make up the visible raster"

The 525 includes a lot of other stuff. Easy mistake because PAL shows 576 lines (out of 625), but only at 25 full frames / 50 interlaced half-frames per second as opposed to 30p/60i for NTSC. (PAL DVDs are also 576.)

While they're all constrained by the scanline in the vertical direction, the analog standards are resolution-limited in the horizontal raster by the bandwidth / frequency response of your signal chain; I've seen beta-derived analog NTSC that's gorgeous, far better than DVD. Especially on a really well-corrected CRT monitor (really!).

The decision to go to an even 480p for DVD probably derives from the 8x8 pixel blocks of the MPEG-2 compression. Having raster dimensions that are evenly divisible by 8 is a good thing for a lot of these block-based codecs; I believe MPEG-2 couldn't go below 8x8 (h.264 can accommodate smaller and non-square macroblocks, though).

That said, there's a nugget of truth in your comment. When we go to digital, we often get better average fidelity, but worse maximum fidelity. A beautiful analog system can be really great. Maybe in twenty years we'll have a hipster revival of 70mm film prints? It's the new vinyl...

(I'm being a little tongue-in-cheek; reports from Ang Lee's latest movie are that the digitally-captured 4096p120 stereo 3D is better than the real thing. I saw 30-year film industry veterans were walking out of a test screening shaking their heads in disbelief -- I couldn't get in because the line was around the hall.)

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#58

Post by mappu »

SSLy wrote: post #47
wmf wrote: post #27

Earlier quoted context omitted.

Because Hollywood has higher quality standards than pirates?

Tell that to the pirate encoders who had to deband movies because the official releases were so bad.

In the early/mid 2000s there was a whole scene around manually applying inverse telecine to badly produced commercial anime releases, with custom tools like YATTA.

Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?

#59

Post by hvidgaard »

ultramancool wrote: post #44
6nf wrote: post #37

Earlier quoted context omitted.

There's a difference though. DRM music files are sold directly to consumers. These consumers have to be able to decrypt the files on their own computers / devices which makes DRM useless. The movie files in this case are not meant for consumers. They're only decrypted on specialised equipment not accessible to the general public. If you manage to get your hands on a DCP file there's nothing you can do to decrypt it w…

Yeah, but let's be honest, if I had a job as a manager at a theater and a moderate amount of reverse engineering skill or a small team of friends with those, well, time, access and tools combine quite well... Sure, they make it look all secure, pass it through all that crypto and stuff but ultimately it has to be passed to the projector chip in some form which is unencumbered to be turned into light. At which point i…

According to another comment here, the anti tamper mechanics on those projecters are not limited. They are in fact quite aggressive.

If they have been any kind of smart when designing them, the decoded stream takes a limited, shielded, and highly tamper resistant path to the projector chip, and each and every critical component are paired with each other such that switching one of the out automatically destroy all keys.

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