Dolby Vision now possible through MP4 Mux.

[JoseTheBae]

Is there some trick to enabling lossless audio in Plex on the Ugoos AM6B Plus? Lossless audio works in Kodi. Oddly, the 32-bit Kodinerds build seems to discard the Full Enhancement Layer in Dolby Vision, even though Plex plays it perfectly. If I can just get lossless audio working in Plex, I will finally achieve full Dolby Vision (FEL) playback.

[JoseTheBae]

With Ugoos AM6 plus/Kodi Matrix DV edition (thanks @Fandangos and @quietvoid) Saving Private Ryan (MKV DV) no flicKering like the m2ts on Sony X700.
This is the first time that a device (except Sony X700) does not flickers on this film.
I tried Firestick 4K, Shield 2019 and Google Chromecast with Google TV.
In Ugoos (latest firmware 0.40) also HD audio (True HD Atmos and DTS X) works in passtrough in Kodi.
My soundbar confirms.

Can you please share a link to that specific Kodi build that did not produce flickering for the opening of Saving Private Ryan? For some reason, I get flickering on my Ugoos AM6B Plus in Kodinerds, but not in Plex.

[JoseTheBae]

I've tested the Ugoos AM6 Plus media player (Amlogic S922X-J), and it seems, the internal player correctly processing the Full Enhancement Layer from DTDL mp4 file!
https://youtu.be/RYeLEYk_Bys

I'm tried with Kodi 19 custom build and working same with the P7 STDL mkv too!

Can you please share a link to this custom Kodi build? Kodinerds discards the Full Enhancement Layer on my Ugoos AM6B Plus, but Plex does not.

[JoseTheBae]

I got PLEX to trigger both DV and Atmos in a MKV container and for the 5 minutes I watched (power rangers), it was perfectly stable. AVR showed lossless Atmos.
but once again when I stopped playback and started it again, back to lpcm stereo and no more DV. Just gotta wait for a ugoos update, I just sent them another email.

What Plex Client version was this on? I can't get Plex to output lossless audio on my Ugoos AM6B Plus.

[RESET_9999]

What Plex Client version was this on? I can't get Plex to output lossless audio on my Ugoos AM6B Plus.

no particular version. I was able to make it work about 3-4 times and it just seem to work randomly.

[JoseTheBae]

I downloaded the modified ExoPlayer build, which I made Kodi's default player. Unfortunately, playback stutters a lot, although it does appear to be processing the Full Enhancement Layer. Is there some other player with smoother Dolby Vision playback, or perhaps a newer version of ExoPlayer?

[ragico]

With Ugoos AM6 plus/Kodi Matrix DV edition (thanks @Fandangos and @quietvoid) Saving Private Ryan (MKV DV) no flicKering like the m2ts on Sony X700.
This is the first time that a device (except Sony X700) does not flickers on this film.
I tried Firestick 4K, Shield 2019 and Google Chromecast with Google TV.
In Ugoos (latest firmware 0.40) also HD audio (True HD Atmos and DTS X) works in passtrough in Kodi.
My soundbar confirms.

Can you please share a link to that specific Kodi build that did not produce flickering for the opening of Saving Private Ryan? For some reason, I get flickering on my Ugoos AM6B Plus in Kodinerds, but not in Plex.

Here: https://forum.kodi.tv/showthread.php?tid=360018
Sorry, I no longer own the Ugoos. It was quite unstable.

[JoseTheBae]

With Ugoos AM6 plus/Kodi Matrix DV edition (thanks @Fandangos and @quietvoid) Saving Private Ryan (MKV DV) no flicKering like the m2ts on Sony X700.
This is the first time that a device (except Sony X700) does not flickers on this film.
I tried Firestick 4K, Shield 2019 and Google Chromecast with Google TV.
In Ugoos (latest firmware 0.40) also HD audio (True HD Atmos and DTS X) works in passtrough in Kodi.
My soundbar confirms.

Can you please share a link to that specific Kodi build that did not produce flickering for the opening of Saving Private Ryan? For some reason, I get flickering on my Ugoos AM6B Plus in Kodinerds, but not in Plex.

Here: https://forum.kodi.tv/showthread.php?tid=360018
Sorry, I no longer own the Ugoos. It was quite unstable.

The 32-bit (ARM) build? I believe I tried that and still got flickering (using PlexKodiConnect), but I will give it another try.

[RESET_9999]

Looks like the 2022 LG TVs handle L5 slightly differently. ( I don't know about 2020-2021 models)
Also, list of movies with incorrect L5. And some streaming web-dl have static Dolby Vision...
https://docs.google.com/spreadsheets/d/ ... l7gtc/edit

C2:


C8:


Device that ignores L5:

[chros]

Hmm, is it with applying the -1 2pt Low WB hack to get proper black on the C2? Can you name an example or upload a sample? Thanks
Awesome compilation BTW!!!

[RESET_9999]

Hmm, is it with applying the -1 2pt Low WB hack to get proper black on the C2? Can you name an example or upload a sample? Thanks
Awesome compilation BTW!!!

sample: https://drive.google.com/file/d/1uXoXA4 ... sp=sharing
Just to be clear, this is not an issue with the TV. If L5 was set correctly to 0,0, that scene would be fullscreen like the devices that ignore L5.

I noticed the different behavior because of Amazon Terminal List Season 1 which I converted HDR10plus to DV. The show is 2160p 16:9 with black bars (262,262) but the 15sec amazon intro is full screen no black bars.
Of course, I could just edit that first 15sec L5 and leave the rest to 262,262. I just didn't care enough to put in the work...

This would also be a problem if the video L5 was overcropped but I have never seen that error in any of the commercial DV releases. I do see that error in some of those p2p release groups though.
Example:
Framestore Godzilla P8 hybrid L5 is incorrectly set to (4,4,282,282) when the BL is actually (0,0,280,280) which means the TV will overcrop/display a 4px row on each side of the screen and a 2px row top/bottom which will be distracting on the C2 because those small pixels row won't but solid black like they were on the C8. This behavior is only for internal TV playback.

[quietvoid]

I think L5 with 0 offsets even though there are letterbox bars is not as bad, though I haven't compared if it makes a difference in how the TV tone maps.
It's interesting how the C2 behaves. I don't really recommend using the internal player as there's a weird dither pattern in black.

Some difficult titles are those with variable aspect ratios. Especially when a scene has changing letterbox bars.
I think it should be set to the smallest size, otherwise it might crop out video.

But I've seen some titles do the opposite.
It's less likely to be noticeable when the AR transition is fast (5-10 frames).

[RESET_9999]

I think L5 with 0 offsets even though there are letterbox bars is not as bad, though I haven't compared if it makes a difference in how the TV tone maps.

right, as long as they don't lift the trims over 0.025

"Avoid using positive values over 0.025 on the LIFT trim control for letterboxed content. (Negative Lift values are acceptable on all versions). The
current implementation on Ultra HD Blu-ray devices apply the Trims to the entire image area, including the letterbox blanking area, to allow subtitles to
appear over them. If the scene contains positive Lift values over 0.025, this may cause the letterboxed area to have elevated black levels during playback.
An alternate way to achieve the desired result is to use a combination of GAIN and GAMMA trims more aggressively as these controls are
manipulating the tone curve to achieve a more lifted black effect without using Lift. You can also choose to go back and modify your original HDR
content to lift the blacks slightly and then re-analyze and trim without the need to have a positive value on the Lift trim over 0.025. If the active image
area matches the canvas aspect ratio, (i.e. there is no letterbox), positive Lift can be used."

[staknhalo]

Do we know (if able to) if this missing metadata is from the source (ie Apple/authored without it) missing, or missing as a result of capture/rip (cause I see BD with incorrect in the list), or just specific captures for specific releases, a combination of/title dependent, etc?

[JoseTheBae]

With Ugoos AM6 plus/Kodi Matrix DV edition (thanks @Fandangos and @quietvoid) Saving Private Ryan (MKV DV) no flicKering like the m2ts on Sony X700.
This is the first time that a device (except Sony X700) does not flickers on this film.
I tried Firestick 4K, Shield 2019 and Google Chromecast with Google TV.
In Ugoos (latest firmware 0.40) also HD audio (True HD Atmos and DTS X) works in passtrough in Kodi.
My soundbar confirms.

Can you please share a link to that specific Kodi build that did not produce flickering for the opening of Saving Private Ryan? For some reason, I get flickering on my Ugoos AM6B Plus in Kodinerds, but not in Plex.

Here: https://forum.kodi.tv/showthread.php?tid=360018
Sorry, I no longer own the Ugoos. It was quite unstable.

I re-installed that Kodi build again and I still got flickering in the beginning of Saving Private Ryan. It's so odd, because Plex certainly does process the Full Enhancement Layer. At least, this build plays all files smoothly, including those with Dolby Vision and a FEL. The modified ExoPlayer APK stuttered a lot, to the point where it wasn't really watchable, even though it processed the FEL.