I think Plex don’t want fix it. I moved to Kodi from Plex. Kodi no this problem.
Just finally got tired of the buffering and found this thread while looking for a fix - had to write a script to auto-remux my DV mp4’s to mkv’s and the problem is solved. Very annoying and shouldn’t be necessary. This seems like an exoplayer bug rather than a Plex one, but Plex devs could work around it pretty easily.
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Any sign of a fix for this problem?
I am having same issues out of sudden. Until today mp4 worked fine but now it doesnt
I’m getting this even when the container is MKV.
Here are the media details:
I should say that I’m running on a Shield via WiFi but the RX and TX are well about 700. Plex shows it’s only sending ~125.
Other, higher bitrate files work no problem. It’s only DoVi files.
Has a Deep Analysis been performed on that file? You can check the Plex XML of the file and look for a deepAnalysisVersion=6 tag. You’ll also see requiredBandwidths tags as well.
Plex greatly overestimates the necessary bitrate for playback if it hasn’t been deeply analyzed.
I couldn’t find any files. I initiated a scan and analyse. Plex player (Shield) also crashed so I rebooted it. When attempting to play again, it buffered in the same place (a few seconds in) but then continued fine. 
I have the same problem with Dolby Vision files. Plex server is on Windows.
I have a file in a MP4 container that reports 15 Mbit/sec video and 768 kbit/sec audio when I inspect it by hand; when I try to stream it to my Google TV or my Android phone the network outbound traffic hits over 250 Mbit/sec (according to Task Manager) and video playback skips and stutters until it eventually fails.
Everything else (HDR10 content, and higher bit rates, and so on) plays perfectly fine.
I have a TVision Android TV device, and I have an unusual experience. I have an MKV file with a DV video and multiple audio formats, and if I use Directplay while selecting AC3 for audio, the movie will buffer frequently. If I Directplay the video while selecting TrueHD and allowing that audio to be transcoded to Opus, then there’s no buffering.
I don’t think this is a network speed issue, in itself. It’s a gigabit connection that gives me more than 500 Mbps using iperf to a wireless laptop, and the Android TV can get over 200 Mbps from the internet. The video file is maybe 96 Mbps. Maybe I’m completely misunderstanding something, but the network graphs from Plex also look different between those two, and I don’t understand why. With no transcoding whatsoever, the network graph looks relatively flat, hovering around that 96 Mbps mark with some minor ups and downs. With the audio transcode, the network graph has steep peaks and valleys, jumping to 172 Mpbs and then going to nearly 0, over and over. It’s the peaks and valleys that are giving me no buffering whatsoever.
Could the AndroidTV device maybe choke on the AC3 files in a way it doesn’t with the Opus files, making this a client issue? Maybe some weird issue with mesh networking that affects one but not the other? I’m confused.
[Edit: No subtitles used in either scenario.]
Would you be able to try those scenarios without subtitles?
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Hi All, Hi Plex-Team,
was about to complain as well. Just tried to start a 4k DoVi Movie (first time since a couple of weeks) and found Plex on Sony Android TV buffering a hell of a lot.
In Dashboard i saw a constant bandwith up to 300+mbits while direct playing a 15mbits movie. Next I checked some demo movies, and was able to direct stream a 70mbits demo with no buffering. So, performance should not pose a problem here.
I knew, the DoVi Movies in my list where all running fine a couple of weeks back. Didn’t notice, when the problem started.
Fixed accidently!
In settings, i tried a couple of different options, but by pure luck I spotted a NEW OPTION “IO Buffer” which was DEACTIVATED. Once checked, problem’s gone !
kind regards
Maik
Anyone found a fix, I have it on LG C7 with mkv files i het no color and with mk4 files sometimes it lags like hell and sometimes its all ok, don’t get why. HDR10Plus works the best but DV looks a little bit better.
I tried this and it didnt work for me 
Thank you for the suggestion.
I have the same issue, some Dolby vision mp4 files play fine using Plex on my lg oled TV and some stutter and go out of sync. The files are from the same encoder and also stutter on the native player on my oppo clone media player. So it in not unique to the Plex player. I can’t find a solution and find it disappointing that plex have not tried to reach out and help.
If Plex allow select external player it will be easy solution. Vimu, Kodi, just player all of these player play such video without problems.
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Has this really been ongoing since June 2021?
Just got a Dolby Vision capable TV and was stumped when my media wouldn’t play and kept buffering while drawing 100MB/s worth of data.
Could we have a reply from the Plex team, saying they’re at least looking into it?
Happy to provide more details if you need help reproducing.
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mkv works without issue. The problem is only with mp4. Drop your file into MKVToolNix GUI and click Start Multiplexing. Replace your mp4 video file with the new mkv file in Plex. It should work then. If not then this isn’t your issue.
Yesterday I ran into this problem with DV-heavy files in mkv. I have two nvidia shields, one from 2017 and the other from 2019 and in both the DV files are cut off. I had to download the plex version to 8.17.1.25326 for the videos to go well. I hope you find a solution to this since I must have a fairly old version of plex.
Any idea why this is?
I’m having all sorts of issues playing DV files on a Shield TV Pro. Some files play perfect. Some files stutter. Some files buffer and crash
I did what an user suggested: using mkvtoolnixgui I multiplexed a problematic mp4 DV file to mkv DV. It took me 35 mins. but Plex played it flawlessly after that on my android TV and it was still Dolby Vision as my TV said so.
So yeah, I can confirm that PLEX has a problem with certain mp4 DV files.
