Official Request for 2K/4K/UHD Resolution Tag

[Mari Marasu]

I supposed this had to happen at some point, so I wanted to know what your thoughts were on adding a 4K resolution tag to Subler? Obviously since you base a lot of your work around iTunes, this question would be put on hold if there simply is no 4K header/tag yet implemented into iTunes.

Another big issue here being "what is 4K?" because.. you know... tech companies LOVE to agree on standards.

The 4K content that I have is pretty consistently 2160p in height, but I have run into stuff that is both higher and lower. An iTunes Extras support doc says "2880 x 1620 minimum for 16:9 content" and "2048 x 1536 minimum for 4:3 content." Maybe the safest way (for now) would be to simply formulate anything higher than 1920x1080 as 4K content?

I dunno. Thoughts?

[Damiano Galassi]

This will need to wait for iTunes. It's completely useless to try to predict what metadata Apple will add.

[Mari Marasu]

After today, can we officially count this as open?! I've been eagerly waiting haha

[Damiano Galassi]

Maybe, I don't have a 4k AppleTV, and iTunes has not been updated yet.

[Damiano Galassi]

Anyway, if you get your hands on a 4k iTunes Movie, please run it thru MP4Dump ( https://subler.org/downloads/MP4Dump.zip ) and attach the output here.

[guilherme n]

new Tags: 4K, Dolby Vision and HDR, wait for Subler update :)

[Damiano Galassi]

Right, now send me a nice MP4Dump of the file :P

[Mari Marasu]

Seems they've only activated the 4K markers in the store, not the actual 4K video files themselves, as trying to download one gets you the 1080p version. I'll be sure to MP4Dump a file here once I get my hands on a one.

[guilherme n]

apparently it is impossible to download movies in 4K, only in 1080p, however when it is played (streaming) it runs in 4K HDR

https://support.apple.com/en-us/HT207949

[guilherme n]

https://www.macrumors.com/2017/09/21/itunes-4k-content-streaming-only/?utm_source=osx&utm_medium=push&utm_campaign=front

[Mari Marasu]

So we can't get our hands on 4K iTunes content, but I'm running the new AppleTV (in 4K and in 4.2.2 Chroma) so let me know if there's anything I can test for you. What specific information do you need from a 4K iTunes file btw?

[Mari Marasu]

This has been addressed.