121–130 of 242 posts
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yup, there are a lot of re-uploaded videos and also command-line tools for downloading youtube videos
> yup, there are a lot of re-uploaded videos and also command-line tools for downloading youtube videos The former _may_ classify as copyright infringement. The latter definitely does not.
Depending on what country you live in.
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youtube-dl has actually been really useful for backing up my own channel. Simply passing it a channel url and it will download everything in the best quality available.
Google Takeout downloads the originals, which is better than the highest quality reencode.
Another option is that somebody got ahold of some HDCP chips that fell off the back of a truck. There are Chinese companies (Explore Semi and friends) that make HDCP repeater chips with decryption / encryption capabilities. Those bad boys can take an HDCP-protected input stream and strip the encryption right off. DCP controls chip sales very tightly in the US, but I imagine it's a practical impossibility in Shenzhen.
So it's a better quality Chinese knock off? We need a word for this.
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The use of DCP seems to be limited to very high resolution releases. The DCP is just a digital print (what movie theaters play for digital releases instead of the reels of film that go with analog releases). It's not really about resolution per se, it's just a term for the whole package that the theater gets.
To add to this - a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k. Often shipped on hard drives, or downloaded via dedicated fiber lines. They key material is distributed separately, and allows for fine-grained control of play back (eg time of day - to the point that if a screening is sufficiently delayed, it may sometimes have to be cancelled if a new key can't be acquired in t…
Where can I buy one?
Last I heard, smallest 4k projectors start at $400k.
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a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k. Often shipped on hard drives, or downloaded via dedicated fiber lines. This is not a show stopper. All you need is one unlocked copy to drop in the open, and then everyone can work on it, and get it packed up in a more reasonable format. This all works due to proprietary hardware - the modifications to the 4k cinema projectors th…
> a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k In a way it's shocking that huge cinema screens ONLY project 4k. When we had film instead of digital projectors, we actually had a much higher resolution on screen. It's a shame we replaced it with an inferior technology.
Earlier quoted context omitted.
To add to this - a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k. Often shipped on hard drives, or downloaded via dedicated fiber lines. They key material is distributed separately, and allows for fine-grained control of play back (eg time of day - to the point that if a screening is sufficiently delayed, it may sometimes have to be cancelled if a new key can't be acquired in t…
> last I heard from around 15k to 30k USD Where can I buy one? Last I heard, smallest 4k projectors start at $400k.
Firstly DCPs are not wrappers that contain MXFs. From what I remember DCP predates MXF.
From memory (its been 8 years since I've actually dealt with creating them) They are effectively zip files that contain JPEG2000, lots of metadata and some sound tracks.
Crucially, the authoring and encryption are controlled by a central authority. Each projector needs to be registered with a KDM to make sure it can receive decryption keys. http://www.artsalliancemedia.com/software/screenwriter#featu... is one system for managing projectors.
Getting a distribution DCP is pretty hard, also Keys are short lived. But, someone people create non-encrypted DCPs for various purposes.
If its a MXF, then that suggests its either from a finishing house, or more likely a producer's laptop. (ie how wolverine got leaked, a pissed up producer leaving an unencrypted laptop on a plane. Even though their flight was pointless, as there are many remote viewing systems about. )
Earlier quoted context omitted.
yup, there are a lot of re-uploaded videos and also command-line tools for downloading youtube videos
> yup, there are a lot of re-uploaded videos and also command-line tools for downloading youtube videos The former _may_ classify as copyright infringement. The latter definitely does not.
Downloading that video (whether by watching it on Youtube or by using a tool to download the video to watch offline) is, if you don't have the permission of the rights holder another very clear copyright breach.
There's some narrow exceptions for free use, or public domain content.
I'm surprised you think it isn't. In what country would that be true?
Earlier quoted context omitted.
a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k. Often shipped on hard drives, or downloaded via dedicated fiber lines. This is not a show stopper. All you need is one unlocked copy to drop in the open, and then everyone can work on it, and get it packed up in a more reasonable format. This all works due to proprietary hardware - the modifications to the 4k cinema projectors th…
> a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k In a way it's shocking that huge cinema screens ONLY project 4k. When we had film instead of digital projectors, we actually had a much higher resolution on screen. It's a shame we replaced it with an inferior technology.
Earlier quoted context omitted.
> a typical cinema release is a pretty big file - frame-by-frame encoded as jpg2000 in 4k In a way it's shocking that huge cinema screens ONLY project 4k. When we had film instead of digital projectors, we actually had a much higher resolution on screen. It's a shame we replaced it with an inferior technology.
Film has a lot of noise. The resolution is not as high as you are imagining. I've seen both, digital is better.
Film has grain, which is a type of non-chroma signal-dependent noise that is not unpleasant like chromatic signal-independent sensor noise or shot noise you get digitally in photography (not in movies, they have good lighting there).
In fact, grain is actually useful, as it's aesthetically pleasing in small amounts, can increase apparent sharpness. In fact it's so useful digital creations fake back in post-production a small amount of grain.
> The resolution is not as high as you are imagining.
The resolution of 4k projection is not as high as you are imagining either. It's just 4096x2160 lines (often less, depending on aspect ratio) or 8.8 megapixels.
In the best circumstances you can get 25Mpix of useful data from a 35mm frame shot on low grain stocks like 5203. In the worst circumstances you get 10Mpix. This is 35mm, The Hateful Eight was shot on 65mm stock, which has a camera frame surface are of 3.44 times the camera surface of 35mm film.
Either way, the resolution of 4k digital cinema is fine, I miss more the old contrast and gamut.