Dolby Vision now possible through MP4 Mux.

[ragico]

Thanks
I downloaded your Nexus version but have problems for sideloading in the Firestick. Have you any suggestion?

[quietvoid]

Thanks
I downloaded your Nexus version but have problems for sideloading in the Firestick. Have you any suggestion?

Not sure I can help you with that.
I always install mine through ADB, like this:

Code: Select all

adb install -r kodi-20-Nexus-dovi-armeabi-v7a-release-2021-10-07.apk

The -r flag is to overwrite an existing install, I think.

[juzer7]

I want this file to be able to be played on TV, Shield and Android mobile devices. If there is no DoVi compatibility then it would be good if the file is played as HDR. That's why I think the only format BL+RPU with HDR compatibility is Profile 8?

Ok. So I tried
mp4muxer --overwrite --dv-profile 5
and the file reporst as
HDR format : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU / SMPTE ST 2086, HDR10 compatible

MP4 works perfectly on LG OLED and Shield 2019 Pro.

If I turn off DoVi in my Shield the file plays as HDR. I though Profile 8 is not HDR compatible? Anyway. This is exactly what I wanted.

Question 1:
What other TVs/sticks will I be albe to play this file on as Dolby Vision? Fire Stick 4K? Sony TV?

Question 2:
Is there any mobile device (Android, iOS) capable of displaying mp4 DoVi Profile 5 as Dolby Vision?

Cheers

[ragico]

Thanks @quietvoid

Please can you give a more detailed step by step guide on how to use it?
Sorry for my ignorance, I never heard of adb and dont know what to do.
Thanks.

[quietvoid]

Thanks @quietvoid

Please can you give a more detailed step by step guide on how to use it?
Sorry for my ignorance, I never heard of adb and dont know what to do.
Thanks.

The basics of it are to get the tools from here: https://developer.android.com/studio/re ... form-tools
You then need to enable the ADB debugging on the device, it's in the developer options.
Then you can connect with adb by command line with adb connect IP:port.
And then you should be able to install the app.

There are many tutorials on the usage of ADB.

[chros]

I build my own but it's running Kodi 20 Nexus, and doesn't include all binary addons.
You can find it here: https://mega.nz/file/4BVTTAoI#KBpPwfQZ1 ... cjlh62Bh-s
The code branch is this https://github.com/quietvoid/xbmc/tree/ ... oska_build

Thanks for the new build!
(Although Kodi is unusable for me on Firestick4k (ethernet cable, not wifi) for whatever reason: low read rate ... message, and it just stalls for a long time...)

Please can you give a more detailed step by step guide on how to use it?
Sorry for my ignorance, I never heard of adb and dont know what to do.

I just upgraded his build with adbLink easily, just installing the new apk again.

[ragico]

@chros
Many thanks it was easy as you said.

[chros]

Anyways, it made me create a cropped test sample for the important metadata: https://mega.nz/file/8YsRRKJa#_g_vX2voc ... raveYPpiIA

That's a great sample @quietvoid. It's very interesting to see examples of all the DV adjustments, because until now I've always been a little bit vague about exactly what the DV metadata can do.

Indeed, really nice, thanks! Now we could see L2 metadata in action!

interesting thanks... will try on my x700.
that sample has very small black bars though

Yeah, I'm not sure if I'll bother switching to the 2018 model though. I only noticed the grey bars with fades to black.

haha, trust me you will.
Having this exact problem with my x700, I just can't stand the grey black bars(especially the 1600px content). I even prefer my Shield with the red push for p8 cropped content(no red push with p5).

Tried it on Oppo, and yes, grey bars are there.
The interesting part is that how grey it is depends on the metadata! E.g. from the previously linked Dolby manual (thanks for thjis for you RESET and Mannix):
"... Blu-ray players ... Due to this implementation on these devices, any positive lift applied to Dolby Vision content during the “trim pass,” will raise the black levels in the letterbox/blanking areas of the image and can become distracting to the end user. Dolby recommends a maximum positive lift value of 0.025 while doing the trims on letterboxed content during the Dolby Vision content creation process."

Edit: what happens with the "min_pq" L1 metadata during madmeasure2RPU generation? Will it be always 0? (I don't think that madvr's bin file has any info about it.)

min_pq is always set to 0. This is the same behavior as the HDR10+ derived generation.

Thanks, now that's interesting. Maybe we can ask mashdi to provide this value as well in the measurement file.
What do you think what would happen if it's not 0 during tonemapping? I mean what's the effect of this value?

Does anyone compared the result this type of metadata RPU (from madvr) vs static metadata RPU (1 for all frames), if so is there any difference?
Reset, Mannix?

[Manixx2020beyound]

Anyways, it made me create a cropped test sample for the important metadata: https://mega.nz/file/8YsRRKJa#_g_vX2voc ... raveYPpiIA

That's a great sample @quietvoid. It's very interesting to see examples of all the DV adjustments, because until now I've always been a little bit vague about exactly what the DV metadata can do.

Indeed, really nice, thanks! Now we could see L2 metadata in action!

interesting thanks... will try on my x700.
that sample has very small black bars though

Yeah, I'm not sure if I'll bother switching to the 2018 model though. I only noticed the grey bars with fades to black.

haha, trust me you will.
Having this exact problem with my x700, I just can't stand the grey black bars(especially the 1600px content). I even prefer my Shield with the red push for p8 cropped content(no red push with p5).

Tried it on Oppo, and yes, grey bars are there.
The interesting part is that how grey it is depends on the metadata! E.g. from the previously linked Dolby manual (thanks for thjis for you RESET and Mannix):
"... Blu-ray players ... Due to this implementation on these devices, any positive lift applied to Dolby Vision content during the “trim pass,” will raise the black levels in the letterbox/blanking areas of the image and can become distracting to the end user. Dolby recommends a maximum positive lift value of 0.025 while doing the trims on letterboxed content during the Dolby Vision content creation process."

Edit: what happens with the "min_pq" L1 metadata during madmeasure2RPU generation? Will it be always 0? (I don't think that madvr's bin file has any info about it.)

min_pq is always set to 0. This is the same behavior as the HDR10+ derived generation.

Thanks, now that's interesting. Maybe we can ask mashdi to provide this value as well in the measurement file.
What do you think what would happen if it's not 0 during tonemapping? I mean what's the effect of this value?

Does anyone compared the result this type of metadata RPU (from madvr) vs static metadata RPU (1 for all frames), if so is there any difference?
Reset, Mannix?

Min pq is mostly set to 0 on hdr10plus, & produces the same result on hdr10 plus to dv rpu.
There should definitely be a difference per frame vs 1 for all frames.
But on true min pq value dv dynamic meta it varies more often
If mad vr handles scenes changes the same way as dv, the dynamic meta produced should be very close I would assume.

[quietvoid]

The interesting part is that how grey it is depends on the metadata! E.g. from the previously linked Dolby manual (thanks for thjis for you RESET and Mannix):
"... Blu-ray players ... Due to this implementation on these devices, any positive lift applied to Dolby Vision content during the “trim pass,” will raise the black levels in the letterbox/blanking areas of the image and can become distracting to the end user. Dolby recommends a maximum positive lift value of 0.025 while doing the trims on letterboxed content during the Dolby Vision content creation process."

This is not the same problem, the lift affects letterbox bars that are already present in the content.
But in our case there are grey bars when the content does not have letterbox bars at all, because they were cropped out.

[chros]

This is not the same problem, the lift affects letterbox bars that are already present in the content.
But in our case there are grey bars when the content does not have letterbox bars at all, because they were cropped out.

Good point if it's cropped already, I talked about the active image area metadata that simulates cropping.

[RESET_9999]

just generated a profile 08.06 from an HDR10 sample, plays fine with internal Plex app: 04-2160p_23fps_dovi_p81-l_s02e01_cyan_error.ts

To me, it looks like madVR is including the black bars in the measurement because all the min L1 values are 0 in your DV sample. Could be just a different scene cut though.

If I don't set the correct blanking in resolve, I also get 0 everywhere. If set correctly, then I get my first min 0 at exactly 14sec ( frame 343)
otherwise, the max and avg numbers are pretty close. I did not check for a visual difference, only checked the metadata.


I generated metadata using Davinci Resolve Dolby Vision algorithm(same algo studios use). Here's how the L1 metadata compares to madVR for this Netflix clip.





madvr rpu frame 1:

Code: Select all

{
        "Level1": {
          "block_info": {
            "ext_block_length": 5,
            "ext_block_level": 1,
            "remaining": [
              0,
              0,
              0,
              0
            ]
          },
          "min_pq": 0,
          "max_pq": 3157,
          "avg_pq": 1075
        }
      },
      {
        "Level2": {
          "block_info": {
            "ext_block_length": 11,
            "ext_block_level": 2,
            "remaining": [
              0,
              0,
              0
            ]
          },
          "target_max_pq": 3079,
          "trim_slope": 2048,
          "trim_offset": 2048,
          "trim_power": 2048,
          "trim_chroma_weight": 2048,
          "trim_saturation_gain": 2048,
          "ms_weight": 2048
        }
      },
      {
        "Level5": {
          "block_info": {
            "ext_block_length": 7,
            "ext_block_level": 5,
            "remaining": [
              0,
              0,
              0,
              0
            ]
          },
          "active_area_left_offset": 0,
          "active_area_right_offset": 0,
          "active_area_top_offset": 0,
          "active_area_bottom_offset": 0
        }
      },
      {
        "Level6": {
          "block_info": {
            "ext_block_length": 8,
            "ext_block_level": 6,
            "remaining": []
          },
          "max_display_mastering_luminance": 1000,
          "min_display_mastering_luminance": 1,
          "max_content_light_level": 1000,
          "max_frame_average_light_level": 58

resolve rpu frame 1:

Code: Select all

 {
        "Level1": {
          "block_info": {
            "ext_block_length": 5,
            "ext_block_level": 1,
            "remaining": [
              0,
              0,
              0,
              0
            ]
          },
          "min_pq": 12,
          "max_pq": 3298,
          "avg_pq": 2048
        }
      },
      {
        "Level2": {
          "block_info": {
            "ext_block_length": 11,
            "ext_block_level": 2,
            "remaining": [
              0,
              0,
              0
            ]
          },
          "target_max_pq": 2081,
          "trim_slope": 1533,
          "trim_offset": 2007,
          "trim_power": 1177,
          "trim_chroma_weight": 2048,
          "trim_saturation_gain": 2048,
          "ms_weight": 2048
        }
      },
      {
        "Level2": {
          "block_info": {
            "ext_block_length": 11,
            "ext_block_level": 2,
            "remaining": [
              0,
              0,
              0
            ]
          },
          "target_max_pq": 2851,
          "trim_slope": 2058,
          "trim_offset": 2030,
          "trim_power": 2053,
          "trim_chroma_weight": 2048,
          "trim_saturation_gain": 2048,
          "ms_weight": 2048
        }
      },
      {
        "Level2": {
          "block_info": {
            "ext_block_length": 11,
            "ext_block_level": 2,
            "remaining": [
              0,
              0,
              0
            ]
          },
          "target_max_pq": 3079,
          "trim_slope": 2101,
          "trim_offset": 2035,
          "trim_power": 2219,
          "trim_chroma_weight": 2048,
          "trim_saturation_gain": 2048,
          "ms_weight": 2048
        }
      },
      {
        "Level3": {
          "block_info": {
            "ext_block_length": 2,
            "ext_block_level": 3,
            "remaining": []
          },
          "min_pq_offset": 2077,
          "max_pq_offset": 1432,
          "avg_pq_offset": 2048
        }
      },
      {
        "Level5": {
          "block_info": {
            "ext_block_length": 7,
            "ext_block_level": 5,
            "remaining": [
              0,
              0,
              0,
              0
            ]
          },
          "active_area_left_offset": 0,
          "active_area_right_offset": 0,
          "active_area_top_offset": 120,
          "active_area_bottom_offset": 120
        }
      },
      {
        "Level6": {
          "block_info": {
            "ext_block_length": 8,
            "ext_block_level": 6,
            "remaining": []
          },
          "max_display_mastering_luminance": 1000,
          "min_display_mastering_luminance": 1,
          "max_content_light_level": 1680,
          "max_frame_average_light_level": 58

[chros]

just generated a profile 08.06 from an HDR10 sample, plays fine with internal Plex app: 04-2160p_23fps_dovi_p81-l_s02e01_cyan_error.ts

To me, it looks like madVR is including the black bars in the measurement because all the min L1 values are 0 in your DV sample. Could be just a different scene cut though.

That's 0 because madvr doesn't produce any info about min_pq per frame, jast as hdr10+ (as quietvoid and manixx suggested)

I generated metadata using Davinci Resolve Dolby Vision algorithm(same algo studios use). Here's how the L1 metadata compares to madVR for this Netflix clip.

It's Amazon hdr10+. Thanks for the test, measurement results are pretty close indeed (apart from the first avg value, where it's double), really interesting:
- Resolve L6 maxCLL is set to 1680, but it measure more than 3000 nits? what's the unit of the values on the image, nits or PQ?
- - interestingly that's the measurement summary from madvr: MaxCLL 100%: 1680, 99.9%: 1545, MaxFALL: 58, AvgFALL: 9, AvgFMLL: 524 nits
- Resolve set some L2 trim properties (that obviously dovi_tool doesn't by default), why is that? Did you set it or is it automatic?
- Resolve has 3 blocks of L2 metadata, why is that? (target_max_pq: 2081, 2851, 3079; dovi_tool has just 1: 3079) Which one is used during playback?

Min pq is mostly set to 0 on hdr10plus ... n true min pq value dv dynamic meta it varies more often

If I don't set the correct blanking in resolve, I also get 0 everywhere. If set correctly, then I get my first min 0 at exactly 14sec ( frame 343)
otherwise, the max and avg numbers are pretty close. I did not check for a visual difference, only checked the metadata.

Thanks, my question is what the effect of min_pq value is in reality.
@quietvoid, can we overwrite an L2 value in RPU easily, if so how? (e.g. min_pq to 12) Or we have to export it into json and manually replace them and then reinjecting it?

[quietvoid]

- Resolve has 3 blocks of L2 metadata, why is that? (target_max_pq: 2081, 2851, 3079; dovi_tool has just 1: 3079) Which one is used during playback?

One block for every target display peak brightness, so that creatives can adjust to their liking for the whole range of brightness.
In playback, you'd have to figure out what the TV says it can output, this might be the same peak as in the Dolby Vision configuration files used for calibration.
This is why I set multiple blocks to the same values in my L2 test sample.

@quietvoid, can we overwrite an L2 value in RPU easily, if so how? (e.g. min_pq to 12) Or we have to export it into json and manually replace them and then reinjecting it?

You're asking for L2 but min_pq is L1 metadata.
Technically it could be added to the editor but I don't really see a good use case for it..

[Manixx2020beyound]

D9036A05-52EB-42CD-83D5-2E3CB37AD41D.png (803.88 KiB) Viewed 18376 times

Be interesting to find out what mad Vr considers as the active area.
Did anyone try a movie without black bars to see if the min values changed?