Dolby Vision now possible through MP4 Mux.

Please post here for issues related to UHD discs
mtotheb
Posts: 30
Joined: Wed Jan 27, 2021 12:18 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mtotheb »

So after ups and downs with the delivery company I received my Xiaomi Mi TV 4K and can report on its capabilities.

Things that work:
- HEVC (high bitrate too) / AV1
- DTS (HD*) 5.1 & 7.1
— My Soundbar only shows “DTS Audio” for HD and compressed but by playing back the 5.1/7.1 HD Test files the channels are mapped correctly and it is highly likely passing through the right format using OMX.amlogic.audio.decoder.dtshd
- In the settings switching between TV-Led and Source-Led Dolby Vision
- DV MEL DT DL // DV 5 / 8.1 RPU

(Edit2)
- OTG Support with powered micro usb hub: 1TB External hard drive and ethernet. (around 120mbps)

EDIT: Things that don’t work now confirmed:
- DV (FEL DT DL)
— Tested with “black level pattern mp4/ts” & “RPU-FEL Test DT DL p7”, somebody please tell me what to look for in the last one. @Reset_9999 ?

Things that don’t work:
- TrueHD (any) +Atmos
- DTS:X
- The “Dolby Vision FEL Test p7.06 Dual Layer.mp4” I’m assuming it’s because it’s missing rpu? It plays until the 23 frame and then gets stuck.
- Any Single Layer Dual Track DV files
Last edited by mtotheb on Thu Feb 03, 2022 10:53 pm, edited 2 times in total.
Shield TV 2017 -> LG DSN10YG Soundbar with SPK8 Rears -> LG B1 OLED
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mtotheb wrote:
Thu Feb 03, 2022 8:35 pm
— Tested with “RPU-FEL Test DT DL p7”, somebody please tell me what to look for in the last one. @Reset_9999 ?
You will see a video from another movie over the orange picture if FEL is used and a couple of flashes if the RPU is used.
mtotheb
Posts: 30
Joined: Wed Jan 27, 2021 12:18 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mtotheb »

RESET_9999 wrote:
Thu Feb 03, 2022 8:52 pm
mtotheb wrote:
Thu Feb 03, 2022 8:35 pm
— Tested with “RPU-FEL Test DT DL p7”, somebody please tell me what to look for in the last one. @Reset_9999 ?
You will see a video from another movie over the orange picture if FEL is used and a couple of flashes if the RPU is used.
Is there a reference image for that?
I have Blank red until ~26sec then I get the Warner Bros over the red part, a stanley… over the blue part then clockwork over red switching to a movie scene at ~45
Shield TV 2017 -> LG DSN10YG Soundbar with SPK8 Rears -> LG B1 OLED
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mtotheb wrote:
Thu Feb 03, 2022 9:06 pm
Is there a reference image for that?
I have Blank red until ~26sec then I get the Warner Bros over the red part, a stanley… over the blue part then clockwork over red switching to a movie scene at ~45
If you only see a blank red picture, it means FEL is not processed. I'll try to take a picture when I get home.

Do you see the flashes though?
mtotheb
Posts: 30
Joined: Wed Jan 27, 2021 12:18 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mtotheb »

RESET_9999 wrote:
Thu Feb 03, 2022 9:10 pm

If you only see a blank red picture only, it means FEL is not processed. I'll try to take a picture when I get home.

Do you see the flashes though?
I don’t get flashes with P7 only P5 and P8 RPU’s seem to work on the Amlogic S905Y4 sadly.
Shield TV 2017 -> LG DSN10YG Soundbar with SPK8 Rears -> LG B1 OLED
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mtotheb wrote:
Thu Feb 03, 2022 9:17 pm
RESET_9999 wrote:
Thu Feb 03, 2022 9:10 pm

If you only see a blank red picture only, it means FEL is not processed. I'll try to take a picture when I get home.

Do you see the flashes though?
I don’t get flashes with P7 only P5 and P8 RPU’s seem to work on the Amlogic S905Y4 sadly.
yep, unfortunately, it sounds like that device is doing fake DV with P7.
staknhalo
Posts: 145
Joined: Sun Oct 11, 2020 12:05 am

Re: Dolby Vision now possible through MP4 Mux.

Post by staknhalo »

https://photos.google.com/share/AF1QipO ... h6VzZKWlFn

Here's what the FEL test looks like when FEL and RPU are 'working' as intended
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

thank's @staknhalo

the FEL and RPU test files can also be used to find out if your device uses the L5 active area metadata in the RPU.
if it uses L5, there will be black bars otherwise it will be fullscreen.

C8 internal player = black bars
Shield = full screen
x700 = full screen
Albano
Posts: 29
Joined: Sat Jan 15, 2022 8:30 am

Re: Dolby Vision now possible through MP4 Mux.

Post by Albano »

nekno wrote:
Mon Jan 31, 2022 1:07 am

OK, so you want to convert P5 to P8.1 but Apple is using an odd "max_display_mastering_luminance".
Please tell me the way convert P5 to P8 of this file.
This file have not info of Mastering display luminance, Maximum Content Light Level, Maximum Frame-Average Light Le

Image
mimi8384
Posts: 3
Joined: Fri Feb 04, 2022 1:56 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mimi8384 »

RESET_9999 can you link me the files that i can test to see if dolby vision is correctly displayed?
I’have buy a minix u22 that must support dolby vision, i have try several bluray with DV ( converted to .ts format ) and all seem to play correctly…
Sorry for my english, i’m italian.
Ah, another question how i can convert a DTS audio bluray traks to AC3 5.1 ( or best ) , because my sound bar ( SONOS ARC ) not support DTS .
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mimi8384 wrote:
Fri Feb 04, 2022 2:06 pm
RESET_9999 can you link me the files that i can test to see if dolby vision is correctly displayed?
the link is in my signature.
mimi8384 wrote:
Fri Feb 04, 2022 2:06 pm
Ah, another question how i can convert a DTS audio bluray traks to AC3 5.1 ( or best ) , because my sound bar ( SONOS ARC ) not support DTS .
I recommend converting to DD+ 1536kbps with ffmpeg:

Code: Select all

ffmpeg.exe -i input.mkv -map 0:1 -c:a eac3 -b:a 1536k -c:s copy output.mkv
mimi8384
Posts: 3
Joined: Fri Feb 04, 2022 1:56 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mimi8384 »

RESET_9999 wrote:
Fri Feb 04, 2022 3:05 pm
mimi8384 wrote:
Fri Feb 04, 2022 2:06 pm
RESET_9999 can you link me the files that i can test to see if dolby vision is correctly displayed?
the link is in my signature.
mimi8384 wrote:
Fri Feb 04, 2022 2:06 pm
Ah, another question how i can convert a DTS audio bluray traks to AC3 5.1 ( or best ) , because my sound bar ( SONOS ARC ) not support DTS .
I recommend converting to DD+ 1536kbps with ffmpeg:

Code: Select all

ffmpeg.exe -i input.mkv -map 0:1 -c:a eac3 -b:a 1536k -c:s copy output.mkv
But i not have the mkv file.I can demux m2ts file from bluray to obtain DTS audio track with TS MUXER, and then?
mimi8384
Posts: 3
Joined: Fri Feb 04, 2022 1:56 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by mimi8384 »

Tested “RPU-FEL Test DT DL p7” .mp4 and .ts, both show same images ( as your post ), but .mp4 stuck at 0,20” while .ts play entitely….so, DV work?
RESET_9999
Posts: 1853
Joined: Mon Aug 05, 2019 7:12 pm

Re: Dolby Vision now possible through MP4 Mux.

Post by RESET_9999 »

mimi8384 wrote:
Fri Feb 04, 2022 4:06 pm
But i not have the mkv file.I can demux m2ts file from bluray to obtain DTS audio track with TS MUXER, and then?
just change the input extension to whatever your source is.

Code: Select all

ffmpeg.exe -i input.m2ts -map 0:1 -c:a eac3 -b:a 1536k -c:s copy output.mkv
-map 0:1 is the track this cmd will encode... If the bluray has dolby vision, it will be -map 0:2
0 being video 1
1 being video 2
2 being english audio
mimi8384 wrote:
Fri Feb 04, 2022 4:32 pm
Tested “RPU-FEL Test DT DL p7” .mp4 and .ts, both show same images ( as your post ), but .mp4 stuck at 0,20” while .ts play entitely….so, DV work?
You're supposed to see flashes if the rpu is used, and a video on top of the red image if fel is used...

see @staknhalo video: viewtopic.php?p=118382#p118382
nekno
Posts: 56
Joined: Tue Jun 23, 2020 4:40 am

Re: Dolby Vision now possible through MP4 Mux.

Post by nekno »

mtotheb wrote:
Thu Feb 03, 2022 8:35 pm
- DTS (HD*) 5.1 & 7.1
— My Soundbar only shows “DTS Audio” for HD and compressed but by playing back the 5.1/7.1 HD Test files the channels are mapped correctly and it is highly likely passing through the right format using OMX.amlogic.audio.decoder.dtshd
You really just want the DTS-HD bitstream passed through, not decoded, right?

Seems likely that the Amlogic DTS-HD decoder takes DTS-HD input but only decodes the lossy DTS core.

That's how, e.g., Plex's DCA decoder works.

Otherwise they would need to be paying for a hardware decoder license.

But ultimately, you don't want it decoded by the stick, you want it passed through for the soundbar to decode.

Since your soundbar is reporting DTS, seems like the Amlogic is decoding and re-encoding to DTS at worst, or only the DTS core is getting pass through at best.

I assume you have this plugged into your LG B1 and it's passing audio to the soundbar via eARC? Does the B1 pass lossless audio from an HDMI input out via eARC?

On the Sony A80J/A90J, it supports lossless audio over eARC, but only when played back via internal apps. The Sony OLEDs won't take lossless audio from one HDMI port and pass it out through to the eARC HDMI input. TrueHD audio doesn't play at all and DTS-HD only passes through the DTS core or doesn't play, either. So that may be what's happening here if the B1 behaves the same way.
Last edited by nekno on Fri Feb 04, 2022 8:34 pm, edited 2 times in total.
Post Reply