Hi all,
I was hoping someone might have some insights into this issue. I am using the Sony A7111.
First the work flow: 1) bring HLG image into FP16; 2) set project properties to: 32-bit floating point (full range), view transform to Rec.2020 ST 2084 1000 nits (ACES); set clip color space to Rec.2020 ST 2084 1000 nits (ACES).
When I do this final step in changing the color space to 2020 for the clip, black areas appear in the image, which I cannot remove. Then when this is rendered as HDR, these areas shimmer green. Can anyone help with this?
Here is the original clip: https://www.dropbox.com/s/ojnxavo2jvn4yan/C0033.MP4?dl=0.
Sorry I could not trim. My number call out in the clip is because I was linking this to an external audio recording. This was hand held and starts out blurry for a sec.
Here is the rendered HDR video: https://www.dropbox.com/s/3mn8490ujt1cknp/test1.mp4?dl=0
Any insights into this would be great.
Thanks in advance,
dave
PS I did not do any post work on the clip just HLG to HDR and shortened it for the demo.
Up Date:
So I am still on the learning curve and what I am going to comment on is something I do not understand. If I change the clip color space to P3-D60 ST2084 4000 NITs (ACES), the black areas disappear. This only happens with the 4000 nits, not for the 1000 or 2000 P3 spaces. It renders fine (e.g., 2020 color space HDR). And if I set my display to this same color space the image looks exactly like the rendered version (This did not happen with the "traditional Rec.2020 ST 2084 1000 nits (ACES)" settings; I am using a Benq sw271 monitor). All other settings I left the same which is Master Display of Rec 2020, 1000 nits D65 St 2084, full; and the color space for the render (when you hit render as and go to custom settings project) as Rec 2020 st2084 (1000 nits)). I am trying to learn about all of this, so please bear with me.
Here is my observation that might provide insight. When the color space of the clip (and display) is set to Rec.2020 ST 2084 1000 nits (ACES), the histogram is cut off at 1000. Same for P3-D60 ST2084 1,000 and 2,000 NITs (ACES). But at 4000 nits the histogram is not cut off. So I might conclude that the dark areas are the result of clipping. It was the observed clipping in the histogram that gave me the idea to explore with the P3 profiles because of their higher nits.
Any thoughts would be great.
dave