Dolby Vision now possible through MP4 Mux.

[skull88]

Thanks daffie! That explains why I had to raise my black level (above 50) on my LG C2 to get 65-66 to be visible and flash in a dark room, but it didn't make sense intuitively that this would be needed (and some movies looked like blacks were raised as a result). Appreciate the sourced info.

[RESET_9999]

If I'm not mistaken

Wrong.

Yeah, I was going by memory, that's why I said ''If I'm not mistaken'' ...
On my end, tv calibrated years ago, 65-66 is very slightly visible in all 3 modes,(DV/HDR10/SDR) but I have to look insanely close, and I have the perfect black room (black velvet everywhere).

[deadchip12]

Just used your files to test black crush.
SDR looked the most accurate—I could see all the flashing bars up to 65 from my seat (1.2m from the 65-inch TV). HDR10 crushed blacks more; in order to see the 65 bar, I had to move my face closer to the screen.
Dolby Vision was by far the worst—I could barely see past the 90 bar.
Then, I realized why. A few months ago, an update caused black screens in Dolby Vision to no longer appear as true black. Based on recommendations from forum users, I lowered the RGB-Bias to -4 in the advanced color settings to counteract this. When I raised it back from -4 to 0, I could see the bars up to 67 if I moved closer to the screen. So, it still crushes blacks more than HDR10 but is better. The problem is that black is no longer true black again.
Do you have any solutions for this?

If I'm not mistaken, you should see 66–67 flashing from a normal distance, and 65 only when looking about one foot away from the screen. Of course, all of this is in a dark room without lights.

Wrong.
Bar 64 is reference black. Bar 64 and everything below it should be black. Bar 65 and 66 should also be impossible to see it flashing. The first visible bar should be 67. But barely with your nose on the screen. This is all written down in the Calman calibration guide you can find on the Internet.

Do these rules apply to all SDR, HDR10 and DV? Because from the TVs I own, it seems HDR10 & DV always crush black more than SDR.

[daffie]

@deadchip12
Yes, the rules are the same for SDR, HDR and DoVi.

If I'm not mistaken

Wrong.

Yeah, I was going by memory, that's why I said ''If I'm not mistaken'' ...
On my end, tv calibrated years ago, 65-66 is very slightly visible in all 3 modes,(DV/HDR10/SDR) but I have to look insanely close, and I have the perfect black room (black velvet everywhere).

No problem mate.
At least your black levels seem to be quite good after calibration.
I had a costly ''professional'' calibration of my G1 which costs a lot of money and the black levels are still not correct. He didn't even look at them with these black bar patterns.
This is the second time I had a TV of mine calibrated by a professional and second time the result is not like it should. This is also the last time I'm getting it calibrated. Done with this crap. Seems to be impossible to get someone who actually knows his stuff in region Belgium/The Netherlands.

My black levels in SDR are ok, but in HDR the 65-66 bar is visible and in DoVi I'm not seeing bar 67+68... So I'm missing shadow details in DoVi.
The calibrator his ''Autocal'' of Dolby Vision in CALMAN even made things a lot worse. Removing a lot more shadow detail (removing even more black bars).
So I removed his calibration completely and went back to factory settings for Dolby Vision.

I kept his SDR and HDR calibration though.

You pay so much money for a good TV and for a calibration and still it is not perfect. Frustrating.

[RESET_9999]

My black levels in SDR are ok, but in HDR the 65-66 bar is visible and in DoVi I'm not seeing bar 67+68... So I'm missing shadow details in DoVi.

even in cmv4.0 ??? cmv2.9 will be crushed no matter what

[daffie]

My black levels in SDR are ok, but in HDR the 65-66 bar is visible and in DoVi I'm not seeing bar 67+68... So I'm missing shadow details in DoVi.

even in cmv4.0 ??? cmv2.9 will be crushed no matter what

Will check later tonight. Will let you know.

How sad that cmv2.9 is crushed no matter what.
99% of UHD Bluray is cmv2.9....

Will this be fixed in the future you think?

[RESET_9999]

No, I don't think CMv2.9 is fixable, but Dolby added a workaround in CMv4.0 for CMv2.9 deliveries through the generated L2 trims.
For 1000 nit MDL, it doesn't help on my C2, but for 4 000 and 10 000 nit MDL, the generated L2 trims improve the clipping. It's never as perfect as CMv4.0, HDR10, or SDR.

[daffie]

No, I don't think CMv2.9 is fixable, but Dolby added a workaround in CMv4.0 for CMv2.9 deliveries through the generated L2 trims.
For 1000 nit MDL, it doesn't help on my C2, but for 4 000 and 10 000 nit MDL, the generated L2 trims improve the clipping. It's never as perfect as CMv4.0, HDR10, or SDR.

Yeah true. But sadly, allmost all UHD Bluray is CMv2.9 and a lot of movies have 1000 nit MDL

[RESET_9999]

Yeah true. But sadly, allmost all UHD Bluray is CMv2.9 and a lot of movies have 1000 nit MDL

most of the new movies have cmv4.0 on streaming and can be transferred to the bluray remux.

[daffie]

Yeah I know. And good that is possible thanks to your tools. But for me that is too much hassle.

If I buy an expensive UHD disc I expect the best quality possible in Dolby Vision without doing anything extra.

[RESET_9999]

yeah pirates always get better quality than paying customers. You get robbed when you follow the rules, always been like that.

Speaking of 4.0 vs 2.9, I found another difference with 4000nits MDL. cmv2.9 4000nits starts dimming the image much earlier than the TV target: around 400-450nits on my C2 and even when L1 is at the minimum 100nits, there is tone mapping going on and the image looks darker than cmv4.0 100nits.

cmv2.9 1000nits mdl (dims at 800-850nits): https://drive.google.com/file/d/1NM0jOb ... drive_link
cmv2.9 40000nits mdl (dims at 400-450nits): https://drive.google.com/file/d/1WyOkmV ... drive_link
cmv4.0 40000nits mdl (dims at 800-850nits): https://drive.google.com/file/d/1e3FkhW ... drive_link
cmv4.0 1000nits mdl (dims at 800-850nits): https://drive.google.com/file/d/1lo-gJX ... drive_link

[daffie]

Maybe better to stop buying UHD Bluray discs and just download all WEB 2160p releases. That way we at least get cmv4.0 in DoVi...

[RESET_9999]

check your PM. I already do all the cmv4.0 transfer. You just have to inject.

[daffie]

My black levels in SDR are ok, but in HDR the 65-66 bar is visible and in DoVi I'm not seeing bar 67+68... So I'm missing shadow details in DoVi.

even in cmv4.0 ??? cmv2.9 will be crushed no matter what

Did some testing in very dark room.
Calibrated SDR : flashing bar from 67 onwards. That's perfect.
Calibrated HDR: flashing bar from 65 onwards. That's raised blacks. Uncalibrated HDR is exactly the same.

Uncalibrated Dovi cm 2.9: flashing bar from 68 onwards. But the first is barely visible you have to get your nose on the screen and even then it's really faint.
Uncalibrated Dovi cm 4.0: flashing bar from 65 onwards. Again 65 very faint.

Calibrated Dovi was awful with first bar somewhere in the low 70's visible. So I reset that to default.

So indeed Dovi cm 4.0 is kind of perfect in terms of black level. Better than 2.9 for sure.

[RESET_9999]

Sounds the same as my C2 for DV... cmv2.9 is just broken.
I expect the same on the G5 tomorrow...

Can you try the color clipping patterns cmv4.0 vs cmv2.9... On my C2, cmv2.9 is clipped and cmv4.0 perfect: https://slow.pics/c/iYxAEaJt
https://drive.google.com/drive/u/1/fold ... RiSeEAg72W

Uncalibrated Dovi cm 2.9: flashing bar from 68 onwards.

This sounds like the cmv2.9 1000nits MDL pattern? Try the 4 000 and 10 000nits versions, it's a lot worse.

Calibrated HDR: flashing bar from 65 onwards. That's raised blacks. Uncalibrated HDR is exactly the same.

Is the pure black test file also raised in HDR10? I hear the G5 too has raised black in HDR10. I don't care much about HDR10 though, because I only have DV in my library.
https://drive.google.com/drive/u/1/fold ... PpN6PKnkh3