Dolby Vision now possible through MP4 Mux.

[aboulfad]

Try to download your edid with CRU...

I really feel silly , I had my rpi4 connected to my LGTV all the time & w a super simple command tvservice -d, you can dump EDID (256b) & decode it with edid-decode (on rpi5/bookworm its different)

The decoded file has interesting data but surprised by the last video block, which brings me to my Q: in the past week's discussion there was reference to a "1000nits or 2000nits ... edid", is this entry below related to what you were referring to ? Obviously this TV can't be that low so odd.

Target Max Luminance: 350 cd/m^2
Target Min Luminance: 0.00099200 cd/m^2

[RESET_9999]

damn that's very low indeed and looks odd. If its really the 2017 LG tv edid, DV must look VERY dark compared to HDR10 on this TV.

discussion there was reference to a "1000nits or 2000nits ... edid", is this entry below related to what you were referring to ?

I've tested as low as 374nits:
https://www.youtube.com/watch?v=29ed65Aq5K0
https://docs.google.com/spreadsheets/d/ ... 1222148710

[AndreasT]

Hello, I stumbled upon issue, maybe someone here might be able to help me.

I want to convert 4K DV+HDR10 MKV into lower bitrate MP4 to play DV on my LG Plex.

Normally, when I only want to change the container from MKV to MP4 I just use

Code: Select all

ffmpeg.exe -i "source.mkv" -map 0 -c copy -c:s mov_text -strict unofficial "output.mp4" 

and all is nice and dandy. It triggers DV on my LG, but preservers the HDR10 metadata also, so all is OKay.

When I want to convert video stream I use:

Code: Select all

ffmpeg.exe -i "source.mkv" -map 0 -c copy -c:0 hevc_nvenc -cq 32 -preset p5 -c:s mov_text -strict unofficial "output.mp4" 

and it also copy all DV/HDR metadata, it even triggers Dolby Vision playback on TV (DV logo appears in the top right) but brightness is like in SD material. MediaInfoGUI claims all is okay. I lose HDR10+ but I do not care for that.

First is original MKV file:

converted MP4:


Any ideas whit it triggers DV but plays in low brightness?

I'm just curious, why do you want to convert to lower bit-rate?

[JCLG8]

Hi, I recently bought a Sony X700. I am testing it with some of the test files particularly the eagle beak file and I am not sure if it's in LLDV or TV-LED. When it shows the chroma weight there is no change from the original shown before.

[RESET_9999]

Hi, I recently bought a Sony X700. I am testing it with some of the test files particularly the eagle beak file and I am not sure if it's in LLDV or TV-LED. When it shows the chroma weight there is no change from the original shown before.

which TV ?
My LG C2 have a bug and Chroma weight is not working regardless of tv-led / player-led. It doesn't even work with the internal player.

[JCLG8]

Hi, I recently bought a Sony X700. I am testing it with some of the test files particularly the eagle beak file and I am not sure if it's in LLDV or TV-LED. When it shows the chroma weight there is no change from the original shown before.

which TV ?
My LG C2 have a bug and Chroma weight is not working regardless of tv-led / player-led. It doesn't even work with the internal player.

It is a Panasonic GX800, its a VA LCD from 2019.

[aboulfad]

damn that's very low indeed and looks odd. If its really the 2017 LG tv edid, DV must look VERY dark compared to HDR10 on this TV...

I tried my rpi5 too & it gave same results, I am gonna chuck it to maybe incorrect implementation in the rpi utilities or maybe the TV sends the wrong value ? The sure answer would be from Vertex 2.

Here's a snippet from a DV calibration file (from sonoftumble) for this generation that I used in the past, Tmax looks normal for this TV (so does the rtings HDR plot from rtings tests).

# Dolby Vision User Display Configuration File
# Generated by 5.9.2.59 on 6/19/2019
# DM Version:
PictureMode = 2
Tmax = 759.590301184834
Tmin = 1E-11

[JCLG8]

Hi, I recently bought a Sony X700. I am testing it with some of the test files particularly the eagle beak file and I am not sure if it's in LLDV or TV-LED. When it shows the chroma weight there is no change from the original shown before.

which TV ?
My LG C2 have a bug and Chroma weight is not working regardless of tv-led / player-led. It doesn't even work with the internal player.

Its a Panasonic GX800, a VA LCD from 2019.

[RESET_9999]

I dont know much about calibration (i paid someone to calibrate my TV) but maybe in TV-LED, only the internal TV DV configuration is used and the EDID target brightness is ignored?? And the EDID is only useful to the player when it does LLDV?

That would explain the odd result I see when I use high brightness TV-LED edid on my cheap 600nits vizio TV.

[aboulfad]

DV calibration for LG TVs generates a file that you can load onto the TV. Although not recommended, I tried that calibration file in the past on my OLED. The Tmax in it must have been measured via calman & other required equipment.

Your theory that EDID info/LLDV player may make sense as those two entries are below Low Latency ...

Low Latency: Standard + Low Latency
Target Max Luminance: 350 cd/m^2
Target Min Luminance: 0.00099200 cd/m^2

[quietvoid]

I dont know much about calibration (i paid someone to calibrate my TV) but maybe in TV-LED, only the internal TV DV configuration is used and the EDID target brightness is ignored?? And the EDID is only useful to the player when it does LLDV?

That would explain the odd result I see when I use high brightness TV-LED edid on my cheap 600nits vizio TV.

That is how it's supposed to work, the EDID is only used by external HDMI devices for detection/player-led.
Internally it's using the config file which is why it's always been preferred to have TV-led playback.

[RESET_9999]

thanks for confirming, it makes sense.

What is the internal config for tmax in our C2

[JCLG8]

Hi, I recently bought a Sony X700. I am testing it with some of the test files particularly the eagle beak file and I am not sure if it's in LLDV or TV-LED. When it shows the chroma weight there is no change from the original shown before.

which TV ?
My LG C2 have a bug and Chroma weight is not working regardless of tv-led / player-led. It doesn't even work with the internal player.

Hi, sorry I posted twice on accident. You can look the model I wrote. A few posts up

[aboulfad]

…What is the internal config for tmax in our C2

L o l, I thought that’s what EDID was reporting based on all the previous posts, back to square 0. It must be hidden in the TVs firmware. I don’t recall seeing anything in service menu or ez adjust of my E7.

[RESET_9999]

Its a Panasonic GX800, a VA LCD from 2019.

Since it's quite a old TV, it might not support TV-LED.