Quicktime Dolby Vision Metadata from iphone

Flame Between Renders
1

So I got a iPhone 12 and I am checking out its HDR mode, I am really interested in how Apple is shoving the ‘Dynamic Dolby Vision Metadata’ into their H265 10bit .mov files .

It seems like they have the same amount of Metadata tracks as the iPhone 11, but I cant find anyhting that can read the contents (ffprobe, mediainfo, exiftool) so I am not sure why the non-HDR iPhone would have the same metadata tracks but I mostly wonder what is in there.

-Dolby metadata changing inside a single clip would be weird, it would/should be static for that shot, but maybe its actually per frame and its just trying to balance out the auto-exposure function to some degree, no idea…

  • the SDR conversion on a macbook doesnt look like the same thing done with Dolby Vision in Flame
    (left Original iPhone HDR right exported after SDR Trimmpass from Dolby 4.0)

146726237_10157648103976813_2740122551433945961_o
146726237_10157648103976813_2740122551433945961_o3816×1068 688 KB

you can download the original file here if you want to have a play.
https://fromsmash.com/Y01J-an1G2-dt

2

Maybe you’ll have better luck if you shoot with Filmic?

1 Like
3

Yea only had a few minutes with (my wifes) the phone today, I will install filmic later and see if it makes a difference I would assume the metadata is encoded in the same way however… hmm I even contacted dolby about more information on what this iPhone Dolby actually is but so far no response on that front.

4

FYI

You can now “create” those odd iPhone dolby vision HLG files using the latest apple compressor .

It seems to analyze the source as I tried with a really bright PQ hdr master and it turned darker visually on a sdr display so its doing something.

It however doesnt look like its doing anything dynamic…