Dolby Vision now possible through MP4 Mux.

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LV8HD
Posts: 37
Joined: Tue Jan 11, 2022 3:48 pm

Re: Dolby Vision now possible through MP4 Mux.

#9016 Post by LV8HD » Sun Oct 15, 2023 3:01 pm

Hi guys, I'm working on the movie The Equalizer, and I want to inject Dolby Vision coming from the iTunes WEB-DL but I've noticed something I've never seen in a rpu:

Code: Select all

Summary:
  Frames: 189960
  Profile: 8
  DM version: 1 (CM v2.9)
  Scene/shot count: 2426
  RPU mastering display: 0.0050/4000 nits
  RPU content light level (L1): MaxCLL: 1544.77 nits, MaxFALL: 290.81 nits
  L6 metadata
    Mastering display: 0.0050/4000 nits. MaxCLL: 1774 nits, MaxFALL: 936 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1317 nits, MaxFALL: 412 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 3403 nits, MaxFALL: 412 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1694 nits, MaxFALL: 30 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2203 nits, MaxFALL: 223 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 3221 nits, MaxFALL: 223 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1936 nits, MaxFALL: 184 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2727 nits, MaxFALL: 184 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2008 nits, MaxFALL: 205 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1870 nits, MaxFALL: 596 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1463 nits, MaxFALL: 122 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1769 nits, MaxFALL: 782 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1476 nits, MaxFALL: 216 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2071 nits, MaxFALL: 703 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2819 nits, MaxFALL: 121 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2029 nits, MaxFALL: 264 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2047 nits, MaxFALL: 161 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1567 nits, MaxFALL: 108 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1331 nits, MaxFALL: 33 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1754 nits, MaxFALL: 935 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2205 nits, MaxFALL: 82 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2015 nits, MaxFALL: 20 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1766 nits, MaxFALL: 830 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 2431 nits, MaxFALL: 830 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1795 nits, MaxFALL: 135 nits
    Mastering display: 0.0050/4000 nits. MaxCLL: 1795 nits, MaxFALL: 27 nits
  L2 trims: 100 nits, 1000 nits
  L2 Trim Count (TargetID, count): (1, 2400) (48, 1)"
  L5 Left=0 Right=0 Top=280 Bottom=280
I've never seen multiple values for L6 metadata, could anyone explain why?

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9017 Post by RESET_9999 » Sun Oct 15, 2023 3:02 pm

your display capabilities dont matter, you should use the correct MDL according to the content brightness.
dapope wrote:
Sun Oct 15, 2023 2:39 pm

If you have a display with a max brightness under 1000 nits, is there any point to using the 4000 nits option?

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9018 Post by RESET_9999 » Sun Oct 15, 2023 3:04 pm

LV8HD wrote:
Sun Oct 15, 2023 3:01 pm
Hi guys, I'm working on the movie The Equalizer, and I want to inject Dolby Vision coming from the iTunes WEB-DL but I've noticed something I've never seen in a rpu:
I've never seen multiple values for L6 metadata, could anyone explain why?
yes it happens sometimes. I guess if you would play the movie in HDR10 on a device that can convert DV to HDR10, they would be used.

Image

LV8HD
Posts: 37
Joined: Tue Jan 11, 2022 3:48 pm

Re: Dolby Vision now possible through MP4 Mux.

#9019 Post by LV8HD » Sun Oct 15, 2023 3:07 pm

RESET_9999 wrote:
Sun Oct 15, 2023 3:04 pm
LV8HD wrote:
Sun Oct 15, 2023 3:01 pm
Hi guys, I'm working on the movie The Equalizer, and I want to inject Dolby Vision coming from the iTunes WEB-DL but I've noticed something I've never seen in a rpu:
I've never seen multiple values for L6 metadata, could anyone explain why?
yes it happens sometimes. I guess if you would play the movie in HDR10 on a device that can convert DV to HDR10, they would be used.

Image
I see, thank you.

Draco1544
Posts: 7
Joined: Sun Dec 18, 2022 12:32 am

Re: Dolby Vision now possible through MP4 Mux.

#9020 Post by Draco1544 » Sun Oct 15, 2023 6:21 pm

With the RESET_9999 script, I can bake the EL and get the same bit rate (without compression) than the original movie ?

dapope
Posts: 38
Joined: Fri Oct 09, 2020 4:54 am

Re: Dolby Vision now possible through MP4 Mux.

#9021 Post by dapope » Mon Oct 16, 2023 10:58 am

RESET_9999 wrote:
Sat Oct 14, 2023 1:35 pm
Trees wrote:
Sat Oct 14, 2023 8:41 am
Quick question; when generating CMv4.0 content (3-1), how does one determine what Mastering Display to use? I assuming higher isn't necessarily better?
2 options:

1- just use the static metadata from your source HDR10
2- check the brightness first with madvr. If 95% of the movie is under 1000nits, use 1000nits MDL else, 4000.

Option 2 is better because some movies have a static MDL of 4000nits but the actual brightness is under 1000nits.
A 4000nits RPU is a lot darker than a 1000nits one regardless of the content's actual brightness and in my opinion, 4000nits MDL + low nits content is wrong without L2 trim passes because if you look at the generated(or original) trims with a 4000nits analysis, they brighten/compensate a lot for the darkness a 4000 rpu brings.

https://slow.pics/c/uVX5iFOD
Is this an example of what you're talking about here? The MaxCLL basically doesn't go above 1000 nits, so I should choose 1000 nits for 3-1 despite the MDL being reported as 4000 nits?
https://imgur.com/a/VhPte1l
Also, how does expanded brightness via FEL factor into this? Scream 3 has FEL expanded brightness. Wouldn't the FEL brightness be taking it over 1000 nits?

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9022 Post by RESET_9999 » Mon Oct 16, 2023 2:09 pm

dapope wrote:
Mon Oct 16, 2023 10:58 am
doesn't go above 1000 nits, so I should choose 1000 nits for 3-1 despite the MDL being reported as 4000 nits?
yes
Also, how does expanded brightness via FEL factor into this? Scream 3 has FEL expanded brightness. Wouldn't the FEL brightness be taking it over 1000 nits?
FEL is the difference between the original master and the hdr10 encode. The difference can be anything they decide.

dapope
Posts: 38
Joined: Fri Oct 09, 2020 4:54 am

Re: Dolby Vision now possible through MP4 Mux.

#9023 Post by dapope » Tue Oct 17, 2023 2:18 am

RESET_9999 wrote:
Mon Oct 16, 2023 2:09 pm
dapope wrote:
Mon Oct 16, 2023 10:58 am
Also, how does expanded brightness via FEL factor into this? Scream 3 has FEL expanded brightness. Wouldn't the FEL brightness be taking it over 1000 nits?
FEL is the difference between the original master and the hdr10 encode. The difference can be anything they decide.
I'm sorry but I don't really understand how to act on this.
Say you have the following situation, as with Scream (your screenshots here: https://slow.pics/c/j9rBXDQU). The MDL is listed as 4000 nits.
The HDR plot goes barely over 1000 nits. Maybe, for the sake of argument, we could say that it doesn't really go over 1000 nits at all, like the plot I shared of Scream 3. But the DV plot goes much higher, almost to 4000 nits.
In this situation, using 3-1, should I choose the 1000 nits option or the 4000 nits option?
Thank you!

Tompi
Posts: 1
Joined: Tue Oct 17, 2023 9:29 am

Re: Dolby Vision now possible through MP4 Mux.

#9024 Post by Tompi » Tue Oct 17, 2023 9:38 am

Mission Impossible - Dead Reckoning Part One in Dolby Vision Profile 8 is completely unwatchable on Philips TV.
Tried Apple TV 4K, Shield TV Pro but same picture. Plex and Vimu installed on the TV are the same.
If I buy the film from iTunes the picture is perfect and if I download the original Profile 5 version it is perfect.
What is causing the problem with Profile 8?

Profile 8:
https://freeimage.host/i/img20231014210744.JFn1NcJ
Profile 5/iTunes Movies
https://freeimage.host/i/img20231014215916.JFn1O8v

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9025 Post by RESET_9999 » Tue Oct 17, 2023 11:01 am

dapope wrote:
Tue Oct 17, 2023 2:18 am
In this situation, using 3-1, should I choose the 1000 nits option or the 4000 nits option?
Thank you!
As I said, you measure any video with madvr, if 95% is under 1000nits , you use 1000nits MDL in 3-1.

Fel dv plot has nothing to do with this.

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9026 Post by RESET_9999 » Tue Oct 17, 2023 2:09 pm

Tompi wrote:
Tue Oct 17, 2023 9:38 am
Mission Impossible - Dead Reckoning Part One in Dolby Vision Profile 8 is completely unwatchable on Philips TV.
Tried Apple TV 4K, Shield TV Pro but same picture. Plex and Vimu installed on the TV are the same.
If I buy the film from iTunes the picture is perfect and if I download the original Profile 5 version it is perfect.
What is causing the problem with Profile 8?

Profile 8:
https://freeimage.host/i/img20231014210744.JFn1NcJ
Profile 5/iTunes Movies
https://freeimage.host/i/img20231014215916.JFn1O8v
Yeah, not surprised.
The HDR10 and P5 DV versions have different brightness and all those uploaders make P8 hybrid assuming its always the same.

https://slow.pics/c/doZxc4kj

LV8HD
Posts: 37
Joined: Tue Jan 11, 2022 3:48 pm

Re: Dolby Vision now possible through MP4 Mux.

#9027 Post by LV8HD » Tue Oct 17, 2023 3:22 pm

Hi guys, I've lately started generating hdr10+/dv for all my movies that don't have them. The first thing to do before generating comes to encoding an Apple ProRes version of the movie. For instance, one could set encoding to maximum quality and the resulting file will be huge, while I usually keep quality at 5 in which I found a good compromise between quality and space, so how much of importance does the ProRes quality have to do with the final result?

skull88
Posts: 56
Joined: Mon Mar 27, 2023 3:08 pm

Re: Dolby Vision now possible through MP4 Mux.

#9028 Post by skull88 » Tue Oct 17, 2023 3:46 pm

LV8HD wrote:
Tue Oct 17, 2023 3:22 pm
Hi guys, I've lately started generating hdr10+/dv for all my movies that don't have them. The first thing to do before generating comes to encoding an Apple ProRes version of the movie. For instance, one could set encoding to maximum quality and the resulting file will be huge, while I usually keep quality at 5 in which I found a good compromise between quality and space, so how much of importance does the ProRes quality have to do with the final result?
I use -qscale:v 3 and RESET's script has -qscale:v 4, which I believe he found to be best overall compromise between speed/size and PQ/accuracy, if I'm not mistaken.

mtotheb
Posts: 37
Joined: Wed Jan 27, 2021 12:18 pm

Re: Dolby Vision now possible through MP4 Mux.

#9029 Post by mtotheb » Wed Oct 18, 2023 12:46 pm

Apparently the new Fire TV Stick 4K Max (2Gen) 2023 16GB supports:
-Dolby TrueHD (Atmos) passthrough
-DTS passthrough
-DTS-HD passthrough (basic profile)
which is new.
Still no FEL / Profile 7 DoVi support per https://developer.amazon.com/docs/fire- ... ax_gen2_16 though.

„Dolby Vision support for Profile 4-MEL, 5, 8, 9 & 10. (Up to Level 9 for profiles 5, 8 and 10. Up to Level 5 for Profile 9)“
Shield TV 2017 -> LG DSN10YG Soundbar with SPK8 Rears -> LG B1 OLED

RESET_9999
Posts: 2093
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

#9030 Post by RESET_9999 » Wed Oct 18, 2023 1:21 pm

Thanks for the info but unfortunately, the FireTV device is probably the worst one for DV rip.

1- Overall a much darker image than all the other devices. Not a subtle difference, its very noticeable.
https://www.youtube.com/watch?v=1ZnPmBFuYtw

2- Stutter with high bitrate videos (I had to redo the firetv lldv capture about 3 times in that YouTube video)
5ghz wifi or USB to ethernet adaptor

3- Can't do true TV-LED meaning it's always the player that is processing the dynamic metadata.

4- Does some Dolby Vision IQ internally even if your TV is in cinema mode with DV IQ is set to off(greyed out)... This is related to L11 cmv4.0 which should only works when your TV is in Cinema Home mode with DV IQ on.

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