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

[GodzilaAvenger]

Originally Posted by dbgt7

Does this still applies? So if i have a movie with mixed IMAX and normal widescreen content, do i set borders to 0? DDVT says top and bottom video border are 208 px and rpu top and bottom borders are 207 px.

Do i need to crop video borders to 0? or crop rpu? or both??

For mixed aspect ratio content I recommend leaving the RPU borders as they are, i.e. the border part should display something like "[LEAVE UNTOUCHED]". Another option would be to set the borders to the height of the smallest black bar (corresponding to the tallest scene(s)).

[techdiver]

Originally Posted by GodzilaAvenger

When adding DV or HDR10+ metadata you have to make sure that it's synced with the video stream, otherwise there'll be annoying artifacts (jumps in brightness). This is especially true when using sources from different medium, like digital vs. Blu-ray, as those are usually not synced because of some initial logo or something.

To check if the metadata is synced with the file you can use the FILEINFO script to get the scene cuts (frame numbers where scenes change, frame numbers starting from 0), and match that with the frame number in the actual video (I like using djv, though be careful since in it frame numbers start from 1, not 0). You can then apply the positive or negative delay in the INJECTOR script (I haven't used the HYBRID script but if it has a delay option you can use that too).

Excellent. Thanks for the reply!

[-QfG-]

-v0.61.5 Online.
*FIXED missing HDR Info String in mkvtomp4 script with DV P5 files.
*Updated mkvtoolnix to v 81.0.0.0.

EDIT: Little error in the DEMUXER script, it's fixed now, no version update, simply download again. (12/08/2023)

[NeverExists]

Hi, with Wandavision Web Version, when I try to extract the RPU It recognizes Dolby Vision Profile 5, but then gives an error saying 0 frames parsed.

Edit: NVM It's cause it was an mp4. using MKVToolnix to convert it to mkv, then running through the demuxer worked.

[cool advertise]

Originally Posted by -QfG-

-v0.61.5 Online.

I think I found a bug in your tool, in the demuxer, when you have an .mkv with only hdr10+, without dolby vision, and you want to extract or demux the hdr10+ in a HDR10Plus.json file, the tool does not extract it.
EDIT: I had the first version of the tool v0.61.5, now I have downloaded the latest one and everything works, sorry...

[-QfG-]

No problem.

NVM It's cause it was an mp4. using MKVToolnix to convert it to mkv, then running through the demuxer worked.

Will check and fix mp4 demuxing in the next version.

[GodzilaAvenger]

I recently got the new Avatar (2009) Blu-ray which comes with Dolby Vision FEL, but when I looked at the RPU the brightness data seems to be static, like HDR10 (the L1 plot is just a straight line). I found a web source with HDR10+ metadata that seems to be far more dynamic when it comes to scene-by-scene (or even frame-by-frame) L1 data. So my question is, should I stick to the original RPU or should I convert the HDR10+ one to DV RPU and inject it into the file?

[-QfG-]

You must check the frames by the Seamless Branching CAN UHD. The Extended Cut from the CAN UHD has 396 Frames more as the BD and WEB versions. Theatrical Cut from the US UHD has better quality, but no DV. You can add the DV EL Layer from the CAN Theatrical Cut into the US UHD.

[GodzilaAvenger]

I have the US UHD Steelbook Theatrical Cut which does come with P7 DV FEL. The problem is that like every other 4K release of Avatar the brightness data in the RPU is just the same value for all scenes (essentially HDR10). But, I've found a web source (of the Theatrical Cut) with HDR10+ metadata where the brightness is dynamic. So my question is, do I stick to the original RPU, or should I turn the HDR10+ metadata into a new RPU and inject it instead?

[von Suppé]

GA, why don't you just give HDR10+ a try and see if the result looks better than with native FEL/RPU.
Chances are that the HDR10+ video be of other grading, but in the end your eyes are the final judge.

[GodzilaAvenger]

So, to my eyes they pretty much look the same, but then again I'm not that good at judging picture quality in general, so I was wondering if there's a best practice in this situation since I don't know much about mastering or color grading or metadata generation.

[sofakng]

Can somebody explain the RPU and its relationship to profile 5 and profile 8?

If I understand correctly, the RPU is the dynamic metadata packets describing the change in brightness per frame/scene, etc.

Does profile 5 contain RPU data or is it 'already applied' (encoded) into the video stream?

I know profile 5 doesn't contain a base layer (and has a different colorspace) from profile 8 but I'm still trying to understand the basics...

[GodzilaAvenger]

Your understanding of RPU is generally correct (it also has dynamic tone-mapping data). P5 and P8 both have a base layer and an RPU, P5 base layer uses a different color space from the one that P8 uses to be backwards compatible with HDR10. You can use dovi_tool (which is baked into DDVT) to convert P5 RPU to P8.

[-QfG-]

-v0.62 Online
*UPDATED Complete overhaul of the Injector script.
*ADDED Feature for settings custom mkvtoolnix path in Options.
*Updated mkvtoolnix to v 82.0.0.0.
*FIXED minor bugfixes

[Axeldook]

Thank you

great tool for DV'ing my mkv's that wont play DV on my LG c1's.

Quick question, any way to add chapters ?


thank you

[-QfG-]

You can simply add chapters with mkvtoolnix.

[SeeMoreDigital]

Originally Posted by Axeldook

...great tool for DV'ing my mkv's that wont play DV on my LG c1's.

What device are you going to play them with?

[Axeldook]

Hi,

LG C1 with Plex app

[Axeldook]

Hi,

MKV tool nix doesnt do mp4

[Nico8583]

Hi,
mkvtoolnix now supports Dolby Vision but can't directly convert Profile 7 to Profile 8.1. Is there a way to convert MKV Profile 7 from mkvtoolnix to MKV Profile 8.1 directly ? So just convert video track and keep other elements untouched.
Thank you.