Yep, I think for this to work properly, both have to come from the same HDR grade. I've compared a lot of web streaming encodes with the corresponding bluray disc and I would say it's 99% the same grade but sometimes it is different(can even be different from one streaming site to another). It would be interesting to see what happens when it's the case but personally, I don't think I would bother adding DV metadata to an HDR10 BL if it's not exactly the same grade with exactly the same metadata.shawnc22 wrote: ↑Thu Jul 22, 2021 12:12 amWould this be somewhat of an expected result? My thinking is that both the Hotstar and Disney+ releases are probably from the same master, just that one is offered at a higher bitrate. Maybe a better comparison would be taking the profile 5 RPU from one of the Disney+ Marvel or Star Wars films and applying it to the corresponding UHD disk HDR10 layers. This will probably lead to some varied results, though, as I'm guessing whether or not a disc release and its digital counterpart are from the same master will be different from film to film.
Sometimes, it's exactly the same grade (well when tonemapped to SDR) but the metadata are different, and because my TV use maxcll/fall for the tonemaping, the HDR output looks different but still looks the same tonemapped in SDR with madvr. It would be interesting to find out what would happen there as well.
I did compare Star Wars HDR10 disc vs the web HDR10 and if I recall correctly it was the same HDR grade. I assume the HDR10 encode is always made from the DV grade(even when DV not present on bluray). Seems like a waste of time and money to grade it two times. Anyway, when I get a chance, I will try to add DV rpu to this movie and then take a look if I can spot a difference
The version of Avengers Endgame that's available on torrent websites is 25fps if I'm not mistaken (bluray is 23.976). I wonder if it can affect the output too.