- Posts: 119
- Joined: Sat Mar 21, 2020 6:36 pm
- Real Name: Stacy Rothwell
I've been trying to figure this out myself as well. I spent some time Googling and wasn't able to find anything terribly helpful.
Here are a few things I've found:
- If you go to "get info" on a mac, it says "BT.2020 HLG (9-18-9)". (What do the numbers mean?)
- In final cut pro, things look equally bad to start. But, by experimentation I found that (even in a SDR timeline) adding the "HDR Tools" effect to a clip, selecting "HLG to PQ (Rec. 2100)" with a "peak brightness (nits)" setting of 120 results in exactly the same image as what is produced when the phone automatically converts the clip to SDR. (Which happens, for example, when you airdrop it to a mac laptop.) Surprisingly, using the "HDR to Rec 709 SDR" setting in the "HDR Tools" effect did not result in a nice image.
- In Resolve, if I use a colorspace transform from input color space Rec.2020 to Rec.709 and also do a custom curve, I can get really close to what is produced when the phone automatically converts the clip to SDR. None of the input gammas seem to be doing the trick though. And I can't figure out how to reproduce what I stumbled into while using final cut.
I feel like there's something I'm missing here...