Dolby Vision now possible through MP4 Mux.

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Mrmorrison
Posts: 32
Joined: Thu Oct 20, 2022 2:13 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Mrmorrison »

Ok, tomorrow I'll do the same test with this film.

Thank you
mad83
Posts: 7
Joined: Tue Oct 26, 2021 12:35 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mad83 »


My LG OLED55B7V is not able to play any of those.

Is there anything what i can do to be able to watch them?
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mad83 wrote:
Thu Sep 14, 2023 5:40 am
My LG OLED55B7V is not able to play any of those.

Is there anything what i can do to be able to watch them?
I don't know. You may have to mux them to MP4?
BadSector81
Posts: 10
Joined: Fri Jul 30, 2021 9:08 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by BadSector81 »

Hi RESET_9999!

I used 1.9.2.6. beta 8-7-1 Dolby CM_offline (export SDR 100nits trim pass). My input was a 4K file but I got 2K output. I there any change to get 4K SDR MOV? Thanks!
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

BadSector81 wrote:
Thu Sep 14, 2023 12:55 pm
Hi RESET_9999!

I used 1.9.2.6. beta 8-7-1 Dolby CM_offline (export SDR 100nits trim pass). My input was a 4K file but I got 2K output. I there any change to get 4K SDR MOV? Thanks!
line 117
set downscale=NO

PS expect the mov file to be huge 500gb +
BadSector81
Posts: 10
Joined: Fri Jul 30, 2021 9:08 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by BadSector81 »

RESET_9999 wrote:
Thu Sep 14, 2023 12:59 pm
BadSector81 wrote:
Thu Sep 14, 2023 12:55 pm
Hi RESET_9999!

I used 1.9.2.6. beta 8-7-1 Dolby CM_offline (export SDR 100nits trim pass). My input was a 4K file but I got 2K output. I there any change to get 4K SDR MOV? Thanks!
line 117
set downscale=NO

PS expect the mov file to be huge 500gb +
Nice, thank you so much!
Mrmorrison
Posts: 32
Joined: Thu Oct 20, 2022 2:13 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Mrmorrison »


DV FEL (first file) - X800M2

Image

Image

Image



DV 8 (movie ST SL P7 FEL converted with DoviScript) - Sony Bravia A8H

Image

Image

Image


I must be sincere. To the naked eye, without having two televisions next to each other, I don't notice any difference. Contrary to what happened with FAST X, with this film there isn't such a clear difference. Perhaps from the photos the FEL has a very slight bluer tone but I really can't find any differences. What do you think about it?

I found the entire movie and converted it with your tool without modifying L5
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

well as you have shown in your FAST X comp, regardless of FEL, there is a difference between your BD player and internal tv player(tv being brighter , cooler).
So those comparison looks as expected IMO because the P8 file has wrong metadata for the BL brightness, which makes it much darker than it should. This is the reason why the brightness ''almost'' looks like FEL playback on the x800m2.

If you try the test file that has properly generated P8 metadata (resolve), then like FASTX, it should look brighter using your TV internal player.

But it does look like your TV internal app(looks warm) DV has a different temperature settings than your HDMI input (looks cool)
Zomboy101
Posts: 2
Joined: Wed Aug 09, 2023 10:23 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Zomboy101 »

hey again, - audio format question

firstly this tool is great I've been using it a lot , thanks again for the help with the tools.

I mostly use the scripts to convert p7 mkv files, to p8 ts for my LG C1.

lg support says that ts files with pcm audio are supported.
https://www.lg.com/us/support/help-libr ... 3095976198

but trying to convert with the script returns something like "unsupported audio format" and stops the conversion.

I tried taking the HEVC p8 file created and mux it myself successfully,

can this be fixed in the batch file?
Mrmorrison
Posts: 32
Joined: Thu Oct 20, 2022 2:13 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by Mrmorrison »

RESET_9999 wrote:
Thu Sep 14, 2023 4:29 pm
well as you have shown in your FAST X comp, regardless of FEL, there is a difference between your BD player and internal tv player(tv being brighter , cooler).
So those comparison looks as expected IMO because the P8 file has wrong metadata for the BL brightness, which makes it much darker than it should. This is the reason why the brightness ''almost'' looks like FEL playback on the x800m2.

If you try the test file that has properly generated P8 metadata (resolve), then like FASTX, it should look brighter using your TV internal player.

But it does look like your TV internal app(looks warm) DV has a different temperature settings than your HDMI input (looks cool)
Picture settings are the same for HDMI and video apps. :(


So how do you advise me to act?
If the movie is fel but the fel does not extend the brightness, is it better for me to convert to p8 since the TV is brighter and more colourful?

Instead, when I have a FEL that extends the brightness (by the way, how do I understand it?) should I reproduce it with x800m2?

So

Sony Bravia for:
- P7 FEL convered to P8 if it does not extend brightness
- P7 Mel
- P8
- P5

X800m2 for:
- P7 FEL extending brightness


EDIT:

P8 (wrong) Sony Bravia A8H

Image


P8 (optimal) Sony Bravia A8h

Image


I don't know what to say... the image given by the wrong P8 seems even brighter and more enjoyable to me.

Enough.. I don't give up on understanding more
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

Mrmorrison wrote:
Thu Sep 14, 2023 8:44 pm
I don't know what to say... the image given by the wrong P8 seems even brighter and more enjoyable to me.

Enough.. I don't give up on understanding more
Then your TV internal player is wrong.
It just make no sense that (2000 L1 + 1000nits BL) produce a brighter image than (1000 L1 + 1000 BL)
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

Zomboy101 wrote:
Thu Sep 14, 2023 7:48 pm
hey again, - audio format question

firstly this tool is great I've been using it a lot , thanks again for the help with the tools.

I mostly use the scripts to convert p7 mkv files, to p8 ts for my LG C1.

lg support says that ts files with pcm audio are supported.
https://www.lg.com/us/support/help-libr ... 3095976198

but trying to convert with the script returns something like "unsupported audio format" and stops the conversion.

I tried taking the HEVC p8 file created and mux it myself successfully,

can this be fixed in the batch file?
I'll have a look but...
Last time I checked, LG TVs were downgrading multi-channel PCM to stereo. I even bought an expensive EARC adaptor for my AVR and still couldnot get better than 2.0 PCM audio from the TV.
Trees
Posts: 41
Joined: Sat Sep 03, 2022 8:04 am

Re: Dolby Vision now possible through MP4 Mux.

Post by Trees »

RESET_9999 wrote:
Tue Sep 12, 2023 7:07 pm
Trees wrote:
Tue Sep 12, 2023 7:00 pm
I don't follow. Are you saying The.Grand.Tour.S05E01/02.2023.2160p.AMZN.WEB-DL.DDP5.1.DoiVi.HBRID.P8 are MadVR generated? How do you know that? The plots say CM v4.0 Dolby Vision. Do you think they chose different L1 analysis tuning to achieve "10k nits"? Is it really 10k nits or is that decided by the pixel brightness relative to other pixel brightnesses? I really don't understand what you mean, I'm not sure how it correlates with my question, to be honest with you. I realise I have alot to learn, but I just don't understand what you mean. :(
The Grand Tour is not DV AFAIK.
Your file is DV is not original.
I'm aware. It's in HDR10 or HDR10+ only, because Amazon Prime. I'm just wondering how they're getting better results with the same algorithm. Their plot says it's CMv4.0 DV. I used CMv4.0 on the same input file, but got lesser results. I'm just wondering how that's possible because we're both using the same algorithm.
RESET_9999
Posts: 2013
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

Trees wrote:
Thu Sep 14, 2023 10:20 pm
I'm aware. It's in HDR10 or HDR10+ only, because Amazon Prime. I'm just wondering how they're getting better results with the same algorithm. Their plot says it's CMv4.0 DV. I used CMv4.0 on the same input file, but got lesser results. I'm just wondering how that's possible because we're both using the same algorithm.
Why do you think higher L1 is better?

I don't think the cmv40 L1 plot you posted was done with the Dolby algo. Min_pq is always 0 so either it was done with madvr or hdr10plus and most likely without L3.
the dovi script removes cmv4.0 when it generates from madvr or hdr10plus because I'm not sure if cmv4.0 metadata without a proper Level 3 is actually correct.

As explained before, there are many ways to get different L1. the new algo in cm_analyze can produce different L1 depending on the tuning you use.
In resolve, if you don't use cubic scaling, you get too high values that not a single retail DV movie uses.
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