Vero V Dolby Vision Broken after May 26 Update

Help and Support Vero V
1

TV-led Dolby Vision was working on Vero V plugged into our LG OLED65C9AUA after updating to the November 25 update but now after the May 26 update, Dolby Vision is getting triggered on our TV when playing back DV content but the image is cut in half with a “ghosted/double” image with lines through it.

Here are the logs: https://paste.osmc.tv/ovakelusac.xml

Here is a paste of MediaInfo for the title I tried to playback in the logs above but I’ve tried several DV test patterns and movies that used to work on the November update but now do not on the May update: https://paste.osmc.tv/nunexasuji.mel

VeroVMay26DVBroken
VeroVMay26DVBroken1920×1446 147 KB

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3

FWIW I’ve had some problems recently (detailed on the FEL testing thread) on my older LG B8 OLED. For whatever reason DV rips of the new series of The Boys give me an all white screen (Dolby Vision banner shows on screen, audio is fine, picture is full white and I can’t see any OSD either.) The files work fine with Kodi on my Android box.

The only thing I have vaguely in common with your problem is the “half screen” bit. If I’m watching DV and hit Back, only half of the screen displays. Now, I never want to do this, I only ever hit back in error when I’m watching something, but it’s definitely odd behaviour. I can’t be sure if it’s skin related or not as I haven’t really had a chance to dive into it.

4

@sam_nazarko is there anything more you need from us to figure out what the cause of this regression in DV playability might be after the May 26 update?

5

Maybe a sample of a problem file. Is it all DV files showing this behaviour?

6

Yes. All DV files regardless of FEL or MEL. Even titles I’ve watched before on the November 25 update that worked perfectly are now all failing in exactly the same way.

7

OK. No need for a sample then.

8

Actually I misspoke. I finally got a DV title to play properly. Using dovi_tool it only has MEL. I’ll get a script ran against my UHD library to find which titles are MEL and which are FEL but now I’m wondering if it’s specifically DV titles with FEL that are failing in this way.

9

Confirmed. MEL titles play just fine, FEL titles do not. Both are triggering Dolby Vision on the TV.

10

I can confirm the same in my old LG OLED65C7P. FEL titles show distorted video.

Captures from the fel test files https://kodi.wiki/view/Samples

image
image1920×1418 220 KB

image
image1920×1374 467 KB

11

Here’s mine playing the same test file (FEL_test.mkv) with similar results. Attaching log file, media info, and dovi_tool of the test file used.

Log file: https://paste.osmc.tv/uhedoxunak.xml

MediaInfo: https://paste.osmc.tv/ifepakabaw.tex

Dovi_tool: https://paste.osmc.tv/noconekawa.cpp

Fel_Test
Fel_Test1920×1446 131 KB

14

Please try removing the settings you have for 4k resolutions. Left offset is 10 pixels - try restting it to 0.

        <resolution>
            <description>3840x2160 @ 23.98 - Full Screen</description>
            <subtitles>1042</subtitles>
            <pixelratio>1.000000</pixelratio>
            <overscan>
                <left>10</left>
                <top>0</top>
                <right>3840</right>
                <bottom>2160</bottom>
            </overscan>
        </resolution>
16

Are these Profile 5?

17

Removing the calibration -overscan-, it works. See 80 sec for fel test video:

image
image1920×1624 124 KB

1 Like
18

I assume so. In fairness they’re the ONLY DV files I’ve had a problem with, everything else is fine (bar the FEL black level problem/behaviour we discussed elsewhere). It’s every episode I’ve checked, which is weird, but it’s an outlier.

19

Good catch! That was the fix! Might want to add that to the wiki once it gets published.

Vero5-CalibrationReset
Vero5-CalibrationReset1920×1446 116 KB

1 Like
20

Hopefully not. We always recommend not using Kodi’s ‘calibration’ but some displays don’t have a ‘just scan’ option so we need to cater for users that do need to use calibration. We’re looking into getting that fixed.

Thanks for the report.

2 Likes
21

2014 LG C4 OLED here - Confirmed similar with the above.

Turns out I never knew about the “Just Scan” setting.

Appears I had a user error.

After changing the aspect from 16:9 to Original, and “Just Scan” from Auto to “ON”, was then able to restore all of the overscan settings to 0,0 and confirm that all my Dolby Vision content plays fine.

Solution - LG C4 OLED

Aspect Ratio - Original

Just Scan - ON

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