www.makemkv.com

yossSP wrote: Fri Aug 19, 2022 4:51 pm Tests made on Chromecast with Google TV over both TV-LED and Player-LED modes.
I have played the eight "RPU p8.1/4 L1.L2..._cmv29/cmv40" files.

I can't see any change in picture in L2_trim_chroma_weight, L2_ms_weight, nor any L3 and L8 tests.

Please, can you explain to me what this means? It suposses any problem to Dolby Vision FEL/MEL processing on this device?

Thanks in advance RESET_9999.

Hi, I have made the same tests over the internal player of the Panasonic HZ1000 OLED TV, and it has passed correctly every of them (well, to be honest, my eyes couldn't see any change in picture in a pair or them). So that, the TV supports both CMv2.9 and CMv4.0.

The Chromecast with GoogleTV passes almost all the L1 and L2 tests, but neither the L3 and L8 ones, so it supports CMv2.9 but not the newer v4.0.

With the CCwGTV the tests are the same regardless the DV mode asigned in the Chromecast settings (Standard or Low Latency). I supossed that in TV-LED mode the CCwGTV passes the raw DV source with the original CM version (4.0 or 2.9) to the TV so the TV could process the CMv4.0 correctly, but it doesn't happen.

RESET_9999 wrote: Fri Aug 26, 2022 4:18 pm Hi @jayper

Use the latest version: dovi_tool.exe
The older version ("fix" in the filename) is only for some itunes webdl with invalid L6 metadata.

Cheers, thanks so much!

quietvoid wrote: Sat Aug 20, 2022 1:36 pm

yossSP wrote: Fri Aug 19, 2022 4:51 pmI can't see any change in picture in L2_trim_chroma_weight, L2_ms_weight, nor any L3 and L8 tests.

Please, can you explain to me what this means? It suposses any problem to Dolby Vision FEL/MEL processing on this device?

This is expected and it means the CCwGTV (or your TV, but unlikely as you said it's the same in player-led mode) only supports CM v2.9 Dolby Vision.

So, in real world, it suposses any problem with the DV processing on this device with the UHD rip files made with MakeMKV in Dolby Vision 7.06 FEL/MEL?

This kind of DV files, which kind of CM version use?

yossSP wrote: Fri Aug 26, 2022 4:26 pm the UHD rip files made with MakeMKV in Dolby Vision 7.06 FEL/MEL?
This kind of DV files, which kind of CM version use?

If this is what you are asking, almost all the movies are done in CMV2.9 and I don't understand why because the CMV4.X L1 generation is VERY different than CMV2.9 L1 generation. CMV4.X is supposed to be improved compared to CMV2.9.

CMV4.x vs CMV2.9, same settings, same content:
https://screenshotcomparison.com/comparison/26961

RESET_9999 wrote: Fri Aug 26, 2022 4:59 pm CMV4.x vs CMV2.9, same settings, same content:
https://screenshotcomparison.com/comparison/26961

Well well.. is the v2.9 plot from measurements or an actual title's metadata?
As you can see, the minimum average is 10 nits in v4.x.

If you look at most titles nowadays, they also all have 10 nits min average.
It might not mean anything, but it's possible grades are done in v4.x and distribution uses the 2.9 compatible version of the grade.

It would be useful to look at the XML from a CMv4.0 grade that was exported to CMv2.9.

quietvoid wrote: Fri Aug 26, 2022 5:38 pm

RESET_9999 wrote: Fri Aug 26, 2022 4:59 pm CMV4.x vs CMV2.9, same settings, same content:
https://screenshotcomparison.com/comparison/26961

Well well.. is the v2.9 plot from measurements or an actual title's metadata?
As you can see, the minimum average is 10 nits in v4.x.

If you look at most titles nowadays, they also all have 10 nits min average.
It might not mean anything, but it's possible grades are done in v4.x and distribution uses the 2.9 compatible version of the grade.

It would be useful to look at the XML from a CMv4.0 grade that was exported to CMv2.9.

This is 2.9 and 4.0 plot from resolve measurements. Not actual titles metadata.

But you are right. The new Jurassic world dominion, says CMV2.9 but min avg is 10nits.
I noticed too the min difference and most of the 2.9 movies I checked so far have min 2.5nits.

quietvoid wrote: Fri Aug 26, 2022 5:38 pm It would be useful to look at the XML from a CMv4.0 grade that was exported to CMv2.9.

I did and L1 is the same.
The difference is when you set the resolve project to CMV2.9.

RESET_9999 wrote: Fri Aug 26, 2022 5:42 pmBut you are right. The new Jurassic world dominion, says CMV2.9 but min avg is 10nits.
I noticed too the min difference and most of the 2.9 movies I checked so far have min 2.5nits.

Almost every title released in 2021 has 10 nits minimum average, at least those I have data on.
I checked one from end of 2020 and it's 2.5 nits.

RESET_9999 wrote: Fri Aug 26, 2022 5:47 pmI did and L1 is the same.
The difference is when you set the resolve project to CMV2.9.

So the engine for CMv4.0 measures differently, and has different valid L1 specifications.

I wouldn't be surprised if grading is being done in 4.0 but not distribution.
It's pretty clear that devices supporting CMv4.0 are still pretty uncommon, with the exception of TVs.

right, most titles i checked are older one

jayper wrote: Fri Aug 26, 2022 4:09 pm Hi Reset! First of all, thanks for all your time and effort maintaining these tools and educating the forum.
...

I would also like to join in thanking RESET_9999 for his time and effort!!!
Really appreciate everything you’ve done and do.

And I am still struggling with my mkv to mp4 conversion)

duder wrote: Fri Aug 26, 2022 7:02 pm

jayper wrote: Fri Aug 26, 2022 4:09 pm Hi Reset! First of all, thanks for all your time and effort maintaining these tools and educating the forum.
...

I would also like to join in thanking RESET_9999 for his time and effort!!!
Really appreciate everything you’ve done and do.

And I am still struggling with my mkv to mp4 conversion)

you're welcome!

Did you try the latest version (1.5.2)?

RESET_9999 wrote: Fri Aug 26, 2022 2:51 pm Wow, so your TV only supports LLDV but still has the newest CMV4.X version of DV.

I don't think it has CMv4
But does it matter with Player-led mode, hm?
If player supports CMv4 it should output DV with all CMv4 processing.

RESET_9999 wrote: Fri Aug 26, 2022 4:59 pm

yossSP wrote: Fri Aug 26, 2022 4:26 pm the UHD rip files made with MakeMKV in Dolby Vision 7.06 FEL/MEL?
This kind of DV files, which kind of CM version use?

If this is what you are asking, almost all the movies are done in CMV2.9 and I don't understand why because the CMV4.X L1 generation is VERY different than CMV2.9 L1 generation. CMV4.X is supposed to be improved compared to CMV2.9.

CMV4.x vs CMV2.9, same settings, same content:
https://screenshotcomparison.com/comparison/26961

Ok, thanks for your answer RESET_9999.

Well, then, if a mkv file uses CMv4.0, a device that only supports CMv2.9 couldn't process all the improvements of the EL layer, only the ones compatible with the CMv2.9. So that, the picture looks worse than it is, loosing all the improvements coded in L3/L8. That's right?

And a final question, the difference in image quality between a full process with CM4.0 source and a CMv4.0 source playingback compatible CMv2.9 in a device that only supports v2.9 is remarkable or subtle?

lexyz wrote: Sat Aug 27, 2022 8:58 am I don't think it has CMv4
But does it matter with Player-led mode, hm?
If player supports CMv4 it should output DV with all CMv4 processing.

you can try the ATV fake p5 version in your internal tv player. It worked for other Sony owners
https://drive.google.com/file/d/1K6Z3mn ... sp=sharing

yossSP wrote: Sat Aug 27, 2022 10:48 am Well, then, if a mkv file uses CMv4.0, a device that only supports CMv2.9 couldn't process all the improvements of the EL layer, only the ones compatible with the CMv2.9. So that, the picture looks worse than it is, loosing all the improvements coded in L3/L8. That's right?

And a final question, the difference in image quality between a full process with CM4.0 source and a CMv4.0 source playingback compatible CMv2.9 in a device that only supports v2.9 is remarkable or subtle?

No, it would not look worse because L1 is the same.
L8 is just an improved(i suppose) version of L2 and in the end, shouldn't really look different even though each metadata works differently than L2.
The point of trim passes is that the movie looks roughly the same on every TV regardless of its capabilities.