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Is watermarking on movie Blu-rays a thing? (lemmy.world)

submitted 3 weeks ago* (last edited 3 weeks ago) by chloridesubsector@lemmy.world to c/piracy@lemm.ee

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Is that (still) a thing? How safe is it to rip Blu-rays for seeding?

Edit: clarification. I mean the invisible kind of watermark used as a unique identifier of the disc and associated file.

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[–] slazer2au@lemmy.world 6 points 3 weeks ago (4 children)

As they are mass produced the best they could narrow it down to was a region.

[–] chloridesubsector@lemmy.world 2 points 3 weeks ago* (last edited 3 weeks ago) (3 children)

Could they not nust change a single pixel in the entire movie and use that as the identifier? Why would that be more expensive to do during production? It's not more expensive than giving your product a product ID, isn't it? Surely, modern software and production can do this cheaply.

I'm no expert on this, that's why I'm asking.

[–] mipadaitu@lemmy.world 8 points 3 weeks ago (1 children)

They physically print the disks, so each one from a print line is the same. It would be too expensive to dynamically print every single disk uniquely.

Additionally, there would be no way for a printed disk to be tracked to a specific sale. We just don't have that level of granularity in our sales. Best Buy scans the UPC barcode of a disk to sell it to you, they don't track the specific serial number of each disk to know that you bought which one.

[–] AndrewZabar@lemmy.world 2 points 1 week ago

Beyond all that, the ripping process will tend to destroy any reliability of having a manipulated pixel remain exactly the same unless the person uses absolute lossless with no compression.

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