They have just agreed to add it to the mkv standard
So now we just have to get exoplayer to add support (as they just have to read data and throw it further) or Plex to do it themselves.
Atleast now noone can say it is not part of the standard
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Regarding exoplayer, plex uses a Custom version of it, so it is not guaranteed that they will merge it in
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Exoplayer developers wants others to make a pull request with the change to facilitate the new standards for the format.
So unless Plex would want to pick this up themselves with reading the CodecPrivate parts during AVC/HEVC playback i think we would have a long wait here - unless someone familiar with audio/video playback programming have the time to look into it!
The mere time it would take me to get familiarized with video programming would make it take me weeks or months to get anything proper going - even when i program on a daily basis.
Worst part is that someone with knowledge of it could do it in a few days!
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I am confident that the right people will solve this problem one day. When I got into Dolby Vision Muxing two and a half years ago, it was all very new and hardly anyone had the topic on screen or in need. It was quite complicated to create a rip and it had all the disadvantages of an mp4. A lot has changed in time and more and more people wanted Dolby Vision. More and more programs can now handle it. Therefore I look positively into the future.
Everyone here should push the topic wherever possible! Two years ago we would not have received 10 votes for the request. I am glad that we have already got so many votes together.
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i will also give a spin on the implementation this weekend as i do work as a programmer. there is just so much knowledge about the mkv format and dolby vision needed to do it fast and easy - so i will not likely be able to finiah this weekend or the next 
but i dont have doubts that we will get there - i just want it tomorrow instead of next year
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100% for this. I do not wish to maintain two versions of my UHD files, especially with how big they get
You get my vote
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yusesope seems to have found a way to play MKV on the shield with the exoplayer
https://www.makemkv.com/forum/viewtopic.php?p=90210#p90210
shawnc22 has successfully tested it
Yea i know Im in the convo also! Will be trying to work on it during the weekend and see if i can write it more clean.
Lets hope we can get a nice clean version done soon that we can send for review - after that the big question rises - will Plex even merge it in?
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+1 on this!
We just need the specs finalized and then we will get a pull request in place for exoplayer
Yup add me to the listā¦
+1 here
For all those out there wanting this, you should be aware that the spec (which is not yet finalized) has shifted in the past few days. Your existing MKVs are out of spec and highly unlikely to be supported by any player going forward.
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Well thatās disappointing, but not surprising. I guess the best thing to do is to wait and see what Plex ends up supporting when things are finalized and then start encoding our MKVās at that point.
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I expect Plex will support as soon as the existing MKV will support these new specs ā¦ and players will start supporting going forward 
Plex relies on ExoPlayer, as soon ExoPlayer support it, Plex will do too (once they updated to the latest version, of course)
True, but the addition is still simple (we already pretty much got a pull request ready for ExoPlayer if it sticks to the current (yusesope primary, i just helped fixing a bug and doing some clean-up)).
The current plan is to move the data from CodecPrivate area and into BlockAdditionMapping.
It makes it necessary to read the data from multiple points in the code, but is fairly easy still
MakeMKV will still be able to read the old files and āreconvertā them to the new format - new release will be out as soon as the standard is in place within the next few days!
Also important to mention that it is only Dolby Vision which needs to be redone - your files will still play even before then!
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I know @mandrup Iāve been following all the process from the very begining
It was a reply to gbooker02
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ExoPlayer doesnāt matter one bit here. What matters is FFmpeg.
