Hdr grade

thefilmaddict

thefilmaddict

Veteran
I know that this technology is in its early stages, but I wanted to see if I could turn Sony FS7 s-log 3 footage into HDR footage. I don't have a super expensive HDR monitor, so I kind of had to grade with Resolve scopes alone. I watched it at home on a LG Dolbyvision tv. It looks pretty good (the colors and overall brightness pop a lot more than on a SDR tv). How does it look on your HDR TV?

LINK: https://www.youtube.com/watch?v=RamDbdf1FrQ
 
Looks too bright to me.

100 nits is supposed to be nominal diffuse white. Looks like you have peaks going into 10000 nits.

I am struggling on how to make a "bright sunny day" video, because overall things are darker with HDR, not in the least because many consumer is used to SDR displays with a few hundred nits levels instead of 100 nits.
I would be careful with titles not going too light, a few hundred nits seems to be a decent max.

How does this one look to you?


And this one?


The last video is using a custom LUT to fallback to SDR.
 
Is my understanding correct that HDR video looks no different than any other video when viewed on a non-HDR display? I ask because I am watching the linked videos on my Macbook and they don't look special to me in any way. That is to say, they don't look all that different from any 1080 video on youtube.
 
JPNola said:
Is my understanding correct that HDR video looks no different than any other video when viewed on a non-HDR display? I ask because I am watching the linked videos on my Macbook and they don't look special to me in any way. That is to say, they don't look all that different from any 1080 video on youtube.
Click to expand...
On a regular display YouTube will show an automatically converted HDR to SDR version unless the HDR version has a custom LUT included then it will do the conversion using this LUT.

It is best to supply a custom LUT because the automatic conversion is often sub-optimal.
 
The sdr version is not nearly as good. I agree some of the whites are blown out, but it looks pretty good on my lg dolbyvision tv. I watched the alister Chapman video on fs7 to hdr. He mentioned whites at a hundred too. I wonder if this technology will change as TVs get brighter and brighter. I believe you can go up to 10,000 nits. I’ll definitely check out those links. It’s a bit of trial and error without the proper equipment (which is so expensive).
 
thefilmaddict said:
I watched the alister Chapman video on fs7 to hdr. He mentioned whites at a hundred too. I wonder if this technology will change as TVs get brighter and brighter. I believe you can go up to 10,000 nits. I’ll definitely check out those links. It’s a bit of trial and error without the proper equipment (which is so expensive).
Click to expand...
SDR Rec709 video is calibrated for 100nit, now with HDR the levels have not changed but there is much more room for the highlights.
But here is the problem no consumer watches any programs at 100 nits but typically more like 300-400 nits.
So now with HDR displays a 100 nit diffuse white reference will make scenes look dark.
So what is a good level? I suppose the market will establish that. Perhaps diffuse whites will land somewhere between 200-300 nits.
 
thefilmaddict said:
I did another HDR test. I believe my highlights are hitting around 1000 nits in resolve. On my tv, the whites look good (better than my fs7 footage). This was shot with the Panasonic EVA1: https://youtu.be/gRxvQ3WyXoo
Click to expand...
The titles are 1000 nits, I would definitely keep the titles under 600 nits and perhaps even lower.

Overall it is too bright to my liking. If it is too bright the image will lack contrast and the speculars and very bright parts no longer stand out.

Take for instance exactly 2 minutes into the video, apart from the very high blue channel the right side of the image reaches almost 700 nits.
 
thefilmaddict said:
I did another HDR test. I believe my highlights are hitting around 1000 nits in resolve. On my tv, the whites look good (better than my fs7 footage). This was shot with the Panasonic EVA1: https://youtu.be/gRxvQ3WyXoo
Click to expand...

Ofcourse you intended this to be viewed on HDR and I'm only just beginning to get the grasp of HDR posibility, but I guess this would need a custom lut as well? What happens on my SDR monitor is that the whites gets bent pretty bad in the hue. Going cyan and magenta. Even one of the initial shots of the window from the outside the frame has a noticable cyan hue.

From what I gather this is pretty common when trying to view HDR on an SDR monitor. Stuff looks off. Think I'm going to have to save up for that tv now :)

But one question, dunno if you can answer. The YT HDR channel has that world video and the shots in that look incredibly clear and detailed... even on SDR. Is that just because of a custom lut? I mean... the HDR doesn't look dim or washed, I can visually sense that there's a lot of detail in it.
 
You must log in or register to reply here.
Back
Top