As the title says, please fix ASAP playback of Profile 7 (FEL/MEL) inside Matroska (.mkv) container.
On WEB OS 24 it was working with backwards compatibility to HDR10 base layer - in other words the Dolby Vision was omitted.
Currently in WEBOS 25 the files won't work/play.
As LG started to support Profile 8 Dolby Vision from WEB OS 25 in MKV properly, this should be easy fix for LG.
Example of MediaInfo of Profile 7:
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main
[email protected]@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 : 1 h 25 min
Bit rate : 55.3 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) : 0.278
Stream size : 32.9 GiB (91%)
Language : English
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : BT.2020
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 966 cd/m2
Maximum Frame-Average Light Level : 223 cd/m2
Cheers and thank you.