@Ente – I have tested few mp4 and mkv files with either DolbyVision and/or DolbyAtmos video and audio. MKV with DolbyVision is not supported by the TV internal player at all, it will fail to play. DolbyVision mp4 files play fine, just as long as they are 16:9 aspect ratio. If they are wider, the internal player will stretch them vertically, so they look bad. Also – there’s no fallback to HDR10 on such files, they either play or they don’t (many devices don’t support DV outside streaming services/BR4K playback). Well, Philips managed to play some of those files wrong, but you get the idea).
Also – there are some files with multiple audio streams, internal player might choose different than Kodi by default, it might also just not see some of them (you can switch between them in the internal + menu). That’s why you might have been able to see Atmos popup on Kodi and not before. It could be that the file might have been muxed in some incompatible way, that’s too hard for internal player to recognize. This is a big Kodi advantage – it supports more formats (including DVIX/XVID on old AVI files), and is able to pass many of them for the TV internal decoder to use accelerated decoding (hence the Dolby Vision / Atmos popups appearing, and it does that with eg correct aspect ratio etc) – last time I tried to use VLC on this TV (I have OLED854) it mostly tried to decode everything on the TV’s CPU and it was a disaster. Also it doesn’t currently support latest MP4/MKV revisions which is required to support DV/Atmos.
I hope this is useful info for some of you guys. I like the simplicity of the internal player, but it’s getting less and less useful with every update. Do you remember, that apart from AVI/XVID files it also used to support PGS subtitles in MKVs (those are graphic texts, just like on blurays)?
Anyway – I’m not in any way affiliated with Maven Kodi guys, I just stumbled upon that project while searching for any way to play some DolbyVision files with wide aspect ratio and it has blown my mind. Still – it’s still easier to play those files on our TVs, than it to play them on any PC :D
Cheers guys