Comment by Fiveplus
2 days ago
Hmm good point. The issue is also the distinction between widevine L1, i.e hardware-backed DRM and L3 (the software backed one).
Correct me if I'm wrong but to stream 4K, studios require a hardware root of trust and a verified media path. They need a guarantee that the video frames are decrypted inside a trusted execution environment and sent directly to the display without the OS kernel or user space being able to read the raw buffer.
AFAIK Windows and macOS provide this pipeline at the OS level. OTOH, ChromeOS gets 1080p/4K not because it has massive market share but cause the hardware and boot chain are locked down by the almighty Google.
On desktop Linux, where you have root access and can modify the kernel or compositor to inspect memory, there is technically no way to guarantee that secure path to the studios' satisfaction. Am I right in this assumption?
Unless the DRM providers change their threat model, which sounds unlikely to me. Or distros start shipping signed and locked-down kernel modules that prevent the user from being root, which is again unacceptable to most (me included), we will likely be capped at 720p for some time now.
> Am I right in this assumption?
Yes. I tried using Chrome on Linux just to watch movies that I purchased on Youtube at HD/4K and watched as the stream was limited to 240P. IMHO regardless of what Google says in their ToS they have already broken the trust agreement by not providing what I paid for. Regardless of what the studios want, all this does is push me back towards piracy because once again the industry fails to understand that piracy is a accessibility problem, not a financial problem. If I pay for 4K then regardless of where I want to watch that movie it better be in 4K, that's what I paid for. Google hides behind their ToS to get around the fact that they sold me a product then failed to deliver.
> ChromeOS gets 1080p/4K not because it has massive market share but cause the hardware and boot chain are locked down by the almighty Google.
ChromeOS is based on Gentoo Linux underneath just very stripped down and Googlefied. It's the same BS that Bungee pulled with Destiny 2 and Linux. If you so much as dared to run Destiny 2 on Linux you would be banned. Stadia used Linux but because Google controlled the platform they allowed it to be played there.
These are the games they play to make other platforms that aren't MacOS/Windows appear like they are incapable but in reality it's just corporate greed and grift.
I'd imagine only SteamOS on the GabeCube could make this guarantee on Linux
> They need a guarantee
s/need/want/ but yes.
I really wish more people would appreciate this distinction.
I don't think there is a difference. They can need or want or demand and it doesn't matter. They don't have the right to weaponize my computer against me to fulfill their goals.
As far as I understand, on the mobile implementation not even the OS can access the buffers. So even with root you can stream L1 content but not screen record it
> Correct me if I'm wrong but to stream 4K, studios require a hardware root of trust and a verified media path.
Oscilloscopes and signal analysers exist.
As do HDCP strippers. Judging by the availability of 4K Netflix content on torrent sites, I do believe the only people being prevented from watching their content are paying customers acting in good faith.