Dolby Vision now possible through MP4 Mux.

[nekno]

Should it be possible to create DV P7 MEL from madVR HDR measurements?

This isn't working for me:

1. Collect madVR measurements from HDR10 BL
2. Convert to RPU using dovi_tool
3. Convert RPU to P7 using dovi_tool editor with the json file set for "mode": 1
4. Inject RPU into BL using dovi_tool
5. Demux BL and EL+RPU using dovi_tool

The EL stream cannot be rendered and isn't recognized by tsMuxer in order to be remuxed into BDMV.

So obviously there's more data in an MEL stream than the RPU to make it a "null video stream". Upon reflection, that is obvious.

So I need to keep an "empty" HEVC stream laying around.

If I'm using a standard 2160p BL and need the standard 1/4 size 1080p EL to meet P7 specs, could I just take an MEL from another release, demux the EL from the RPU, trim the EL to the correct length, and then inject whatever RPU I need?

Seems like the LOTR or Hobbit movies would be long enough to trim to size for just about any other movie and are all MEL.

[quietvoid]

Technically the EL has to be encoded with the same frame types and order as the BL.
There were some attempts here: https://github.com/quietvoid/dovi_tool/issues/44

It might be possible to simply "generate" an EL, but I'm not sure how involved the process would be.
I've not analyzed a zero'd out MEL stream yet.

[nekno]

Technically the EL has to be encoded with the same frame types and order as the BL.
There were some attempts here: https://github.com/quietvoid/dovi_tool/issues/44

It might be possible to simply "generate" an EL, but I'm not sure how involved the process would be.
I've not analyzed a zero'd out MEL stream yet.

Got it, thanks!

But sheesh, what a giant PITA.

If you can figure a way to reliably identify the frame types of the BL --- since that seems it might be a major obstacle currently --- then generating an EL sounds like it would be the way to go, and a fantastic feature that could solve a lot of compat problems with some players.

[ArArdin]

I also wonder if MEL maybe holds more than RPU. ATM I'm busy with a MEL DV movie. Seeing these sizes:

demuxed MEL (holding RPU) hevc stream: 1.66 GB
extracted RPU.bin: 35.3 MB

I wonder if the remaining 1,25 GB would be nothing else than mere placeholder?

[quietvoid]

I wonder if the remaining 1,25 GB would be nothing else than mere placeholder?

No.

Properly done MEL should be 69 kbps including the RPU. This usually results in 50-150MB.
Even if the EL is encoded with a higher bitrate, if it's actually MEL there's no difference to the RPU alone.

[Coopervid]

Is there any way to make these to 7.06 / Oppo compatible files?

[nekno]

@RESET_9999 --- Thank you for your package of DV tools and videos.

Could you share, what version of madVR and madMeasureHDR is included in Dolby-Vision-Tools.rar?

Where can I download new versions of madMeasureHDR.exe?

I'd like to be able to keep up on the latest tools myself.

madVR 0.92.17 doesn't include madMeasureHDR.exe.

madVRhdrMeasure40.zip doesn't appear to be available from madshi.net at the moment (or anymore?).

The latest is reportedly 1.4.5: http://madshi.net/madVRhdrMeasure145.zip

But that zip file doesn't include madMeasureHDR.exe, either.

madMeasureHDR Optimizer v4.0.2 doesn't include madMeasureHDR with it.

When I attempt to use madMeasureHDR.exe from Dolby-Vision-Tools.rar with the Optimizer app, it opens a popup when I start the work, but then closes immediately, presumably with an error.

When I copy madMeasureHDR.exe from Dolby-Vision-Tools.rar to the madVR folder with 0.92.17 installed, and run madMeasureHDR.exe on the command line, it quits immediately with the error "Could not retrieve IMeasureHDR interface."

When downloading old versions of madMeasureHDR from videohelp.com, the zip files contain the madVR DirectShow filters but no madMeasureHDR.exe.

Where to download madMeasureHDR.exe and why it isn't called madVRhdrMeasure.exe seems to be a well-kept secret.

[RESET_9999]

Could you share, what version of madVR and madMeasureHDR is included in Dolby-Vision-Tools.rar?

the version in the package is 113b, the last one before the time-limited build which I don't use. Just click on the install bat. Install lav filters as well if you haven't already.
viewtopic.php?p=117328#p117328

[Billycar11]

we really need a guide for this i know op is not active could you write up a guide or know where one is and i can recommend woodstock to pin it you seem to be one of the go to people on this or collaborate with others like it did.

[dcoke22]

we really need a guide for this i know op is not active could you write up a guide or know where one is and i can recommend woodstock to pin it you seem to be one of the go to people on this or collaborate with others like it did.

There's this thread: viewtopic.php?f=6&t=26514 but I'm not qualified to know if it is a good starting spot or not.

There's also this post by @yusesope: viewtopic.php?f=12&t=18602&start=2970#p96282 as mentioned by @RESET_9999 recently.

[lexyz]

@all
I was testing some hdr10 patterns converted to DV and look what happen on the Shield/X700/C8 with this P8 pattern : https://slow.pics/c/tnFWN04T (there's definitely something wrong with P8/P7 DV on the shield)

Re-did the FEL test files as well, hopefully, they work better on different devices...
https://drive.google.com/drive/u/1/fold ... V0E3VVkhiC

Thx for patterns
I have a different result with Shield TV, not so ugly as yours. But still worse than HDR10
https://slow.pics/c/taL2k1jx

[RESET_9999]

Thx for patterns
I have a different result with Shield TV, not so ugly as yours. But still worse than HDR10
https://slow.pics/c/taL2k1jx

interesting...
So it means, on the shield the player-led DV is better than tv-led DV for the colorspace conversion but it has the same blue banding and YCbCr clipping is just horrible on that device.
Did you try your TV internal player?

[lexyz]

Nope, since it cant play p8 correctly
But I have X700
https://i.postimg.cc/gkPS9Vm0/DV-X700.png

[RESET_9999]

thanks for testing. x700 lldv looks right
There's no doubt in my mind, the shield is inaccurate when It comes to DV with an HDR10 base layer.
Maybe we should send the pattern to the the Nvidia devs... is there anyone in the beta group here?

[Cr4z33]

I am not succeding into remuxing the English Dolby Vision video track with another E-AC3 and SUB tracks, meaning it doesn't play in DV.

1. I first exctracted the main 10 L5 English HEVC, the Italian E-AC3 and the SUB files with tsMuxer GUI.

• I put then all together with MKVToolNix GUI.

• I again muxed the just created MKV with MakeMKV.

What am I doing wrong here?