Dolby Vision now possible through MP4 Mux.

[Trees]

Is it possible to compare tonemapped P5 screenshots with P8?

Reason I ask is because as of lately I'm seeing more and more "RGB 16-bit" screenshots floating around. Are these accurate representation of what P5 has to offer? I thought it was only possible to compare the two by taking pictures of the TV? If so, how are these RGB screenshots made?

[RESET_9999]

with libplacebo, nothing new...
workflow 7-2 in dovi_scripts

[Trees]

with libplacebo, nothing new...
workflow 7-2 in dovi_scripts

Interesting.

Assuming HDR10 is HDR and Profile 5 DV is "expanded HDR" (effectively 12-bit colours because of how the master-to-P5 conversion works), are these tonemapped screenshots an acccurate representation of P5? Am I correct in thinking there's no point comparing them on a regular 8-bit, regular 10-bit screen (HDR) without the capability of "expanded HDR" (P5)? If you know what I mean?

[RESET_9999]

DV is HDR. HDR is a general term that encompasses all HDR formats: HDR10, Dolby Vision, HLG, and HDR10+.

There’s no visible difference unless the grading itself differs, or if the WEB-DL comes from Apple TV because Apple is stupid, applies the same color reshaping metadata to all content, which slightly distorts the colors. This issue has nothing to do with P5 using 10bit ICtCp that effectively equivalent to 11.5-bit YCbCr. When comparing P5 and HDR10 across Disney+, Amazon, Netflix, or MAX, they will always look identical, even when viewed in 16-bit RGB.

example, Frankenstein 2025: https://slow.pics/c/u84fKFsI

more examples here:
https://docs.google.com/spreadsheets/d/ ... 1226038728

[Trees]

When comparing P5 and HDR10 across Disney+, Amazon, Netflix, or MAX, they will always look identical, even when viewed in 16-bit RGB.

Thanks, I think this clears it up for me. In other words, P5 and HDR10 comparisons need to be done on TVs in order to see the the difference in colours, correct?

example, Frankenstein 2025: https://slow.pics/c/u84fKFsI

What I'm seeing here is just a difference in quality (blocking and compression artifacts etc.), no difference in HDR quality possible, correct?

[Trees]

I finally got a Ugoos AM6B+ (yes, for christmas)!

For clarity sake, is CoreELEC-Amlogic-ng.arm-21.3-Omega-Generic.img.gz still the version to get or is there a newer version available?

I'm asking because the CoreElec website mentions a update, v22.

[SamuriHL]

You can install that to get CoreELEC installed but then I would use this:

https://github.com/avdvplus/Builds/rele ... vdvplus_R3

Basically once you get CoreELEC installed, you put that tar file in the update folder, reboot, and then check the settings, CoreELEC menu to setup your Dolby Vision options for your particular environment.

This is only my recommendation.

[Trees]

Thank you for the recommendation.

Where can I read up on information on the features of this update?

[SamuriHL]

https://github.com/avdvplus/Builds/releases

That's the latest but make sure you go back and read the release notes for R1 and R2, as well. avdvplus did a LOT of work on Dolby Vision.

EDIT: Fixed the link...accidentally posted the same R3 link again.

[coopzr]

I finally got a Ugoos AM6B+ (yes, for christmas)!

For clarity sake, is CoreELEC-Amlogic-ng.arm-21.3-Omega-Generic.img.gz still the version to get or is there a newer version available?

I'm asking because the CoreElec website mentions a update, v22.

If using TV-LED (Your TV supports DV), use CPM A14. https://github.com/cpm-code/xbmc/releases. Nothing else beats this for TV-LED DV.

If using LLDV use avdvplus.

Edit: read below. avdvplus is now recommended over CPM.

[coopzr]

If using TV-LED (Your TV supports DV), use CPM A14. https://github.com/cpm-code/xbmc/releases. Nothing else beats this for TV-LED DV.

If using LLDV use avdvplus.

@RESET_9999 just wanting to check since you are the expert. Is this the right advice?

[RESET_9999]

avdvplus, with guaranteed FEL/BL sync and the LAV Filters audio correction options, is now the best CE build for the Ugoos. The next version also includes a fix for how L5 handles cropped content, which was previously processed incorrectly in A14.

[coopzr]

avdvplus, with guaranteed FEL/BL sync and the LAV Filters audio correction options, is now the best CE build for the Ugoos. The next version also includes a fix for how L5 handles cropped content, which was previously processed incorrectly in A14.

Wow, this is very surprising.

I thought AM6B+ and CPM was going to be the best there ever is. What an exciting time.

[ragico]

Fully agree with Reset_9999.
Avdvplus build not only plays perfectly on Ugoos AM6b plus but also on S905X4 boxes as the Homatics Box R 4K Plus and in this case it also plays the AV1 files with or without Dolby Vision profile 10 without a glitch.

[safariff]

Finally, the first table (list of movies where DV should not be injected) lists a FEL player being required but since the AMB6+ is FEL-capable, are these releases OK to use?

no, any player will be wrong if you make a P8 hybrid of those movies. You need to play them as P7 on the ugoos or bake/encode fel to the BL.

So, to confirm, anywhere on that first table that says "Can only be played on a FEL device and can't be converted to P8 without baking FEL into BL" should be fine with any of the "PROPER DV FEL ENCODER GROUPS"?