Dolby Vision now possible through MP4 Mux.

Please post here for issues related to UHD discs
Message
Author
RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10771 Post by RESET_9999 » Sun Mar 16, 2025 1:37 pm

No, as I said, the generated L2 trim is meant to mimic the improved tone mapping of CMv4.0 on CMv2.9 devices.
CMv4.0 L1 + L3 is roughly equivalent to CMv2.9 L1 + L2.
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

HotFudge
Posts: 28
Joined: Tue Nov 28, 2023 8:42 pm

Re: Dolby Vision now possible through MP4 Mux.

#10772 Post by HotFudge » Sun Mar 16, 2025 2:50 pm

RESET_9999 wrote:
Sun Mar 16, 2025 1:37 pm
No, as I said, the generated L2 trim is meant to mimic the improved tone mapping of CMv4.0 on CMv2.9 devices.
CMv4.0 L1 + L3 is roughly equivalent to CMv2.9 L1 + L2.
Ah sorry RESET.

I think I get it now
For cmv4.0
if L8 is empty then it will use L1+L3 generated metadata otherwise it will use L1+L8.

Thanks very much for your continue help.

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10773 Post by RESET_9999 » Sun Mar 16, 2025 2:55 pm

if L8 is active, it will use L1+L3+L8. Check out these metadata video comparisons: https://drive.google.com/drive/folders/ ... dMiy2ka0mf
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

HotFudge
Posts: 28
Joined: Tue Nov 28, 2023 8:42 pm

Re: Dolby Vision now possible through MP4 Mux.

#10774 Post by HotFudge » Sun Mar 16, 2025 3:38 pm

RESET_9999 wrote:
Sun Mar 16, 2025 2:55 pm
if L8 is active, it will use L1+L3+L8. Check out these metadata video comparisons: https://drive.google.com/drive/folders/ ... dMiy2ka0mf
RESET you are MVP

Thanks again

HotFudge
Posts: 28
Joined: Tue Nov 28, 2023 8:42 pm

Re: Dolby Vision now possible through MP4 Mux.

#10775 Post by HotFudge » Sun Mar 16, 2025 7:19 pm

RESET_9999 wrote:
Sun Mar 16, 2025 10:33 am
L6 is useless
why is this metadata useless?

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10776 Post by RESET_9999 » Sun Mar 16, 2025 7:40 pm

it's not used in DV
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

HotFudge
Posts: 28
Joined: Tue Nov 28, 2023 8:42 pm

Re: Dolby Vision now possible through MP4 Mux.

#10777 Post by HotFudge » Mon Mar 17, 2025 6:48 pm

RESET_9999 wrote:
Sun Mar 16, 2025 7:40 pm
it's not used in DV
Interesting. Thanks

deadchip12
Posts: 379
Joined: Thu May 02, 2019 2:49 am

Re: Dolby Vision now possible through MP4 Mux.

#10778 Post by deadchip12 » Mon Mar 17, 2025 11:29 pm

RESET_9999 wrote:
Sun Mar 16, 2025 7:40 pm
it's not used in DV
Hmm then what's the point of making it a setting in cpm build?

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10779 Post by RESET_9999 » Tue Mar 18, 2025 1:11 am

For the same reason my scripts automatically edit it when injecting XML even though it's useless, why not?
Just enable it if it makes you feel better...
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

Epedemic
Posts: 53
Joined: Mon Jan 21, 2019 11:07 pm

Re: Dolby Vision now possible through MP4 Mux.

#10780 Post by Epedemic » Wed Mar 19, 2025 3:06 am

So, google decided to finally update the CCwGTV to Android 14. However, other than it being a totally botched update, it seems FEL support might be permanently gone, "thanks to" an upgrade to kernel 5.15. I can live with that, as I have a X700 as well, however I wonder if anyone can confirm wether MEL is still played correctly? (It looks like it to me, but I cannot verify it as well as the experts here can)

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10781 Post by RESET_9999 » Wed Mar 19, 2025 2:23 pm

It doesnt matter because the GTV FEL playback is out of sync anyway and it does fake tv-led.
The x700 alters the metadata(not true TV-LED) and ignores any positive lift so get the ugoos if you want the best bug-free DV quality.
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

Epedemic
Posts: 53
Joined: Mon Jan 21, 2019 11:07 pm

Re: Dolby Vision now possible through MP4 Mux.

#10782 Post by Epedemic » Thu Mar 20, 2025 5:58 pm

RESET_9999 wrote:
Wed Mar 19, 2025 2:23 pm
It doesnt matter because the GTV FEL playback is out of sync anyway and it does fake tv-led.
The x700 alters the metadata(not true TV-LED) and ignores any positive lift so get the ugoos if you want the best bug-free DV quality.
Well, I have an ancient TV (LG E6), so TV-LED is not for me yet.

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10783 Post by RESET_9999 » Thu Mar 20, 2025 7:08 pm

pretty sure all the LG TV supports TV-LED and only a few early SONY models didn't.
Maybe you're confusing it with cmv4.0?
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

RESET_9999
Posts: 2410
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#10784 Post by RESET_9999 » Fri Mar 21, 2025 8:18 pm

Since my next TV (G5) will be able to play most content without tone mapping, I thought it would be useful to list all the 4000-nit movie grades. So, I added two new tabs to my Google Drive Excel sheet:

1- movies brighter than 1000nits: https://docs.google.com/spreadsheets/d/ ... 1557834794
2- movies that are practically SDR in HDR container: https://docs.google.com/spreadsheets/d/ ... 1488998734

The dark grades list will be updated frequently over the next few days, as many movies are graded under 300 nits, and I'm still going through my library. For the bright grades list, I think I found most of them (about 200 titles)
Sorry for my English.
G5 / AM6B+ / Denon 7.2.4
DoVi_Scripts
DoVi Playback Devices

powdeau
Posts: 57
Joined: Sat Jan 12, 2019 1:01 am

Re: Dolby Vision now possible through MP4 Mux.

#10785 Post by powdeau » Sun Mar 23, 2025 12:09 pm

If I want to check whether a x700 would alter metadata or not, I just just check if L1 plot values are lower than MDL value?
E.g. if all L1 values would be under 1000 nits and MDL is 1000, then it is OK?

So the only problem would be L1 over 1000 nits with MDL 1000 and L1 over 4000 with MDL 4000? And if that happens I just edit the MDL to higher value (e.g. edit Mad Max Fury Road to MDL 10 000)

Post Reply