[DDVT Tool] Dolby Vision RPU Demuxing / Injecting / Editing. - Page 56

Hansolo · 29th March 2025, 16:41

Hello!

I did some test injecting with original metadata and modified metadata (removing some frames), and i cant see any difference seeing the film.

I thought that using modified metadata, the image will flash or similar when changing scene but film goes well.
What is supposed to be?

Regards!

Amateur · 29th March 2025, 18:00

Quote:

Originally Posted by Amateur

Suddenly I'm getting a lot of errors with trying to use the Hybrid tool in the folder. After getting the error, I came back here to download an update but I still get the error.

From my pictures, the HDR file has HDR10+ and the DV file has Dolby Vision Profile 5.06. I drag-and-drop the files into the Hybrid window so it's not like I'm typing anything incorrectly.

The original DV mp4 file had some weirdness with the FPS so I muxed it into an MKV to see if that helped but it didn't.

I also notice that the screen says that it can turn HDR10+ into Dolby Vision 8 so I tried that as well and still got an error

What is going on?

My desktop happened to have v0.61.4 which still worked. Any ideas what my issue could be? As far as I remember, you should only have to unpack the rar into its own folder and everything works right? No other other installations are necessary?

TempToday25 · 2nd April 2025, 01:06

Hi Kuler!

I believe I may have uncovered a bug or some unintended behavior. I am trying to create a Dolby Vision Profile 8.4 file from a higher-bitrate base HLG stream and an RPU from a Dolby Vision stream that has a lower-bitrate on it's own. Besides trying to create a best-of-both-worlds hybrid file, it's also the file that will be most compatible across the most platforms. The issue I'm running into is that the DDVT tool seems to force a "color_transfer" function value of "bt2020-10" when the original HLG file used "arib-std-b67". The reason that this is important is that this breaks HLG/HDR recognition on many devices (Infuse on Apple devices, VLC on Android and others). Is there a particular reason why DDVT pigeonholes HLG files to use this color transfer function? Here's the mediainfo of the original HLG file (using

Quote:

ffprobe -v error -show_streams -of json -i file.mkv

:

Quote:

"color_range": "tv",
"color_space": "bt2020nc",
"color_transfer": "arib-std-b67",
"color_primaries": "bt2020",
"chroma_location": "topleft",

And after running DDVT_Demuxer to convert a Profile 5 RPU to Profile 8.4 and then DDVT_Injector to interleave the RPU in the HLG file, here's what the mediainfo says:

Quote:

"color_range": "tv",
"color_space": "bt2020nc",
"color_transfer": "bt2020-10",
"color_primaries": "bt2020",
"chroma_location": "topleft"

As you can see the "color_transfer" parameter changed. I've tried using ffmpeg to set the value of the parameter/metadata after the fact but to no avail. FFMPEG doesn't throw an error but the output of this command still shows the same "color_transfer" parameter value:

Quote:

ffmpeg -i input.mp4 -map 0 -c copy -metadata:s:v:0 color_transfer="arib-std-b67" output.mkv

Can you help me with this please?

GodzilaAvenger · 2nd April 2025, 06:10

Just to clarify, Kuler is the maintainer of DoVi_Scripts, -QfG- is the maintainer of DDVT.

As for the issue you're describing, I think (based on the DDVT code) it is related to dovi_tool that handles the DV stuff inside DDVT, perhaps @quietvoid can provide some more info about this.

quietvoid · 2nd April 2025, 11:36

The issue is most likely that the original MKV had the transfer set in the container.

Hansolo · 2nd April 2025, 22:33

Quote:

Originally Posted by Hansolo

Hello!

I did some test injecting with original metadata and modified metadata (removing some frames), and i cant see any difference seeing the film.

I thought that using modified metadata, the image will flash or similar when changing scene but film goes well.
What is supposed to be?

Regards!

Nobody cant tell me what will happen when injecting differente metada?

GodzilaAvenger · 3rd April 2025, 05:11

You've given us very little information, as the answer to your question is completely dependent on the DV RPU, and your eyes. E.g. if brightness across your RPU is mostly uniform, there is a high chance you won't notice the difference. If there is e.g. one scene that has 10 nits brightness and the next 1000 nits or the other way around and you drop a few frames, you MAY notice weird brightness changes for a brief period before a scene cut.

Hansolo · 4th April 2025, 18:59

Quote:

Originally Posted by GodzilaAvenger

You've given us very little information, as the answer to your question is completely dependent on the DV RPU, and your eyes. E.g. if brightness across your RPU is mostly uniform, there is a high chance you won't notice the difference. If there is e.g. one scene that has 10 nits brightness and the next 1000 nits or the other way around and you drop a few frames, you MAY notice weird brightness changes for a brief period before a scene cut.

Thanks for your reply!

This is the info regarding the file...

Code:

ídeo
ID                                       : 1
Formato                                  : HEVC
Formato/Info                             : High Efficiency Video Coding
Formato del perfil                       : Main 10@L5@High
HDR format                               : SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
ID códec                                 : V_MPEGH/ISO/HEVC
Duración                                 : 1 h 48 min
Tasa de bits                             : 24,5 Mb/s
Ancho                                    : 3 840 píxeles
Alto                                     : 1 634 píxeles
Relación de aspecto                      : 2,35:1
Modo velocidad fotogramas                : Constante
Velocidad de fotogramas                  : 23,976 FPS
Espacio de color                         : YUV
Submuestreo croma                        : 4:2:0 (Type 2)
Profundidad bits                         : 10 bits
Bits/(píxel*fotograma)                   : 0.163
Tamaño de pista                          : 18,6 GiB (77%)
Título                                   : The Thing
Idioma                                   : Español
Default                                  : Sí
Forced                                   : No
Rango de color                           : Limited
Colores primarios                        : BT.2020
Características transferencia            : PQ
Coeficientes matriz                      : BT.2020 non-constant
Principios color monitor masterización   : Display P3
Luminancia monitor masterización         : min: 0.0050 cd/m2, max: 1000 cd/m2
Nivel ligero contenido máximo            : 1034 cd/m2
Nivel ligero fotograma medio máximo      : 794 cd/m2

I dont know what you told me about RPU.
The last test i did was to remove 60 frames from the metadata.json and injected into a 1minute clip with brighter scenes and darker scenes for seeing the difference as you told me, but i dont see anything.

Im starting to thing that the hdr10+ is a fake. Not sure, so i upload the 1minute clip with original metadata, not modified.

Code:

https://mega.nz/file/201QnYZD#HQd9z8-kFHJ47HpgsCDjOkiOirKi7SF8JFs9X96RGR0

Maybe you can tell me anything.
Regards!

Amateur · 5th April 2025, 02:24

Is it possible to run the Hybrid tool to work in a batch? One folder of HDR files and another folder of DV files?

Quote:

Originally Posted by puremind

You can use the tool in posted above, very simple instructions. You don't need to do much for the file you have. It is more complicated to transform HDR layer into DV readable, but here you already have the DV layer baked into.

This is possible? I've had a couple instances where the Dolby stream is higher bitrate than HDR and wondered if I could add the HDR info to the Dolby stream.

GodzilaAvenger · 5th April 2025, 09:13

Quote:

Originally Posted by Hansolo

Thanks for your reply!

This is the info regarding the file...

Code:

ídeo
ID                                       : 1
Formato                                  : HEVC
Formato/Info                             : High Efficiency Video Coding
Formato del perfil                       : Main 10@L5@High
HDR format                               : SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
ID códec                                 : V_MPEGH/ISO/HEVC
Duración                                 : 1 h 48 min
Tasa de bits                             : 24,5 Mb/s
Ancho                                    : 3 840 píxeles
Alto                                     : 1 634 píxeles
Relación de aspecto                      : 2,35:1
Modo velocidad fotogramas                : Constante
Velocidad de fotogramas                  : 23,976 FPS
Espacio de color                         : YUV
Submuestreo croma                        : 4:2:0 (Type 2)
Profundidad bits                         : 10 bits
Bits/(píxel*fotograma)                   : 0.163
Tamaño de pista                          : 18,6 GiB (77%)
Título                                   : The Thing
Idioma                                   : Español
Default                                  : Sí
Forced                                   : No
Rango de color                           : Limited
Colores primarios                        : BT.2020
Características transferencia            : PQ
Coeficientes matriz                      : BT.2020 non-constant
Principios color monitor masterización   : Display P3
Luminancia monitor masterización         : min: 0.0050 cd/m2, max: 1000 cd/m2
Nivel ligero contenido máximo            : 1034 cd/m2
Nivel ligero fotograma medio máximo      : 794 cd/m2

I dont know what you told me about RPU.
The last test i did was to remove 60 frames from the metadata.json and injected into a 1minute clip with brighter scenes and darker scenes for seeing the difference as you told me, but i dont see anything.

Im starting to thing that the hdr10+ is a fake. Not sure, so i upload the 1minute clip with original metadata, not modified.

Code:

https://mega.nz/file/201QnYZD#HQd9z8-kFHJ47HpgsCDjOkiOirKi7SF8JFs9X96RGR0

Maybe you can tell me anything.
Regards!

I thought you were talking about Dolby Vision, the RPU I was refering to was for that.

For your case, go into the tools folder of DDVT on cmd or Powershell and run

Code:

hdr10plus_tool plot metadata.json

This will plot the min/avg/max brightness for each frame and should give you an idea of what the metadata contains.

hidef_rec · 12th April 2025, 19:09

My very small contribution to helping less techie DV/HDR fans use this great tool to make hybrid videos:
https://youtu.be/FMqhb7ppGWY

2nd April 2025, 11:36	#1105 \| Link
quietvoid Registered User Join Date: Jan 2019 Location: Canada Posts: 582	The issue is most likely that the original MKV had the transfer set in the container. __________________ LG C2 OLED \| GitHub Projects

3rd April 2025, 05:11	#1107 \| Link
GodzilaAvenger Registered User Join Date: Jul 2022 Posts: 152	You've given us very little information, as the answer to your question is completely dependent on the DV RPU, and your eyes. E.g. if brightness across your RPU is mostly uniform, there is a high chance you won't notice the difference. If there is e.g. one scene that has 10 nits brightness and the next 1000 nits or the other way around and you drop a few frames, you MAY notice weird brightness changes for a brief period before a scene cut. Last edited by GodzilaAvenger; 3rd April 2025 at 16:05.

12th April 2025, 19:09	#1111 \| Link
hidef_rec Registered User Join Date: Jul 2007 Posts: 38	My very small contribution to helping less techie DV/HDR fans use this great tool to make hybrid videos: https://youtu.be/FMqhb7ppGWY __________________ Home Theater Fanatic

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29th March 2025, 16:41	#1101 \| Link
Hansolo Registered User Join Date: Mar 2025 Posts: 3	Hello! I did some test injecting with original metadata and modified metadata (removing some frames), and i cant see any difference seeing the film. I thought that using modified metadata, the image will flash or similar when changing scene but film goes well. What is supposed to be? Regards!

2nd April 2025, 06:10	#1104 \| Link
GodzilaAvenger Registered User Join Date: Jul 2022 Posts: 152	Just to clarify, Kuler is the maintainer of DoVi_Scripts, -QfG- is the maintainer of DDVT. As for the issue you're describing, I think (based on the DDVT code) it is related to dovi_tool that handles the DV stuff inside DDVT, perhaps @quietvoid can provide some more info about this.