Particular 4k DV video file exhibits flickering

Help and Support Vero V
1

Hi Folks

I have successfully played various 4k DV movies from my Vero V since the update, however I have come across one file which flickers intermittently - very frequently/rapidly, but not constantly. It’s disruptive to the point of unwatchable though.

My TV is an LG C1.

Here is the video track’s details from Mediainfo:

Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
HDR format : Dolby Vision, Version 1.0, Profile 7.6, dvhe.07.06, BL+EL+RPU, no metadata compression, Blu-ray compatible / SMPTE ST 2086, Version HDR10, HDR10 compatible
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 23 min
Bit rate : 69.0 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.347
Stream size : 69.1 GiB (92%)
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Original source medium : Blu-ray

This article says profile 7 is ok (this file is 7.6): Dolby Vision support - Vero V - OSMC

Can anyone spot something that might be causing the flickering, please?

2

Can you share a sample that reproduces this problem?

3

Sure thing. Sorry to be a dummy, Sam, but how best would I go about that?

Any advice on making a sample/of what size and how/where to upload it would be appreciated. Not something I’ve done before.

4

Are you familiar with MKVToolNix?
If so, you can tell it to split your video into one minute chunks and then just share the chunk that best shows the issue and delete the other chunks.

Like so:

Untitled
Untitled1135×1021 52.8 KB

Alternatively, you could tell us what movie it is and at what time in the movie playback the issues occur and one of us may have it and we can check it.

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5

We had a problem with Morbius but fixed it. Video was rapidly switching between DV and non-DV.

We can check @Bisonator’s sample if he can upload it somewhere (Google Drive maybe?)

6

Yes, I’ve used MKVToolNix; not for this tho. Thanks for your help!

7

Here you go, Graham:

https://drive.google.com/file/d/1V3WLbGKATDrhQMShal9KdrV0s3-_MYCP/view?usp=drive_link

Please let me know if you need anything else.

8

Yeah, that looks like a similar problem to Morbius.

9

Which you mentioned you’ve fixed, is that right? Will the fix be available soon?
Thanks

10

Correction: it was Morbius that had the problem. That is Profile 7 like your clip.

No promises. I don’t understand why Morbius is OK but yours isn’t.

11

ok - will stay tuned with fingers crossed!

12

I have that movie.
I’ll check my remux and your sample and report back.

*** EDIT ***
Okay, it’s not just the first movie either.
I can’t even get my TV to display the first two movies at all.
I just get a black screen and I can hear the audio playing.
The third movie will actually give me video but it does the flashing.
I checked you demo file and it flashes just like the third movie did for me.
I didn’t even get to the fourth, the fifth, or Bumblebee and my entire system went into a fit switching inputs like crazy.
My TV kept switching to between HDMI 1 (which has nothing plugger into it) and HDMI 2 (which has my soundbar) and my sound bar was switching around as well.
It was like my CEC was possessed.
I literally had to turn everything off and they would turn themselves and each other back on so I had to do a full shut down of everything.

I was on MakeMKV v1.16.3 when I remuxed that collection.
I’m going to remux the first one again and see if anything changes.

*** EDIT 2 ***
All the Transformer movies before Bumblebee are messed up. Bumblebee and Rise of the Beasts play fine. I’m going to redo that set and see what happens.

*** UPDATE ***
I grabbed my Transformer disc and redid it and now it will actually play the video but it flashes just like your demo does.
This is with MakeMKV v1.17.8.

1 Like
13

Just time :smiley:

We have a fix which should be in the next release.

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