Also experiencing this issue on a number of 4K Fire Sticks after the latest update. Only with Remote users. Server has a bandwidth limit of 4MBPS set per user.
Have rolled back to an older version and used Plex for kodi to play videos.
Super disappointing that this is happening. All other players work fine.
Same here, only my recording shows h264.
Itās definitely a bug in the Android tv app. Iāve been getting this error message as well on Plex app recently. When I switch to the Plex Kodi add on the movie plays with no issues. Also another bug on the Plex app I occasionally get is being kicked off a 4k movie on servers that donāt allow 4k transcoding, despite my audio/ video setting being set to original and maximum. As soon as I switch to the Plex Kodi add on watch the same movie from the same server the transcoding doesnāt happen. The Plex Android tv app seems to get worse with every update.
i fixed mine by disabling h264 maximun level under account settings, advanced
Yeah, that seems to have worked, thanks!
more than welcome, glad to help
Iāve 5.1 n my h264 settings already. Iāve solved switching off the new player on my 4k fire stick.
It seems a player bug
Andrea
Thank you! Disabling the player worked for meā¦I hope Plex fixes the issue soon!
+1 for Disabling the new player, but also +1 for disabling the H.264 max level. So in the end, I re-enabled the new player, but left the H.264 max level disabled and it works again!
is it now force transcoding all your video ? what was that setting set to before?
@dan-the-man it had defaulted to 1.0 (the lowest setting) on all my players (Amazon Fire TV 2/3 sticks) ā this, in itself, was suspect in my opinion as I am sure my devices are capable of a higher level than that.
And, I donāt think it is force transcoding the video ā I run Plex on an extremely underpowered Linux VM where transcoding nearly breaks everything. Last night we watched a Bluray MKV (H.264) and playback was flawless. So I donāt think it was transcoding, but admittedly did not look at the logs while watching.
yep thats definaitly wrong, suspect a plex bug/update changed the setting as not the first time ive read its been set to 1.0 instead of the recommended setting
@dan-the-man thanks for the info. what would be the proper way to determine what the level should be set to on a particular device?
I have also Problems with new an old player on fire tv 4 k, plex server is running on synology ds 918+. disabling the H.264 level did help first, but videos with subtitle didnāt play with this setting, so I also have to disable subtitle first before running a video.
I hope this will be fixed soon.
on my shield devices it actually puts (recommended) next to the correct level, assume its not doing that on yours?
@dan-the-man 10-4. mine show ārecommendedā next to 1.0 which seems like a bug in detecting my deviceās capabilities.
@anon18523487 is this already a known issue? its sounds familiar where the h264 level is been incorrectly reset to 1.0 on some devices
Similar configuration here but with 728+ and 16 GB Ram. Canāt transcode anything, but Direct Play works smoothly. When not, I apply your trick and then all OK 
All my media is MKV, h264 or HEV. Again, nothing transcodes, just get errors. Using USB SSD disk for transcoding folder. Are able to transcode with your setup?
Kind regards
I have completely missed how to disable the new player.
im having this problem on my Android v9 os. But for the life of me I cannot find the disable new player in settings.
not under advanced/player, nowhere
