Server Version#: 1.30.2.6563
Player Version#: Latest from Android play store
Basically what it is in the description. Server is running on a Intel Nuc with a J4005 CPU (supports hevc).
With a MiBox 4K as a client, direct play works without issues.
With a GGCWGTV or a Nvidia shield it transcodes Audio to Opus from AC3 and HEVC to H.264.
Attaching two screenshots:
I really have no idea how to further troubleshoot. Plex server logs only say this:
Feb 06, 2023 09:41:30.993 [0x7fac3d5b9b38] DEBUG - Completed: [192.168.178.200:56376] 404 GET /video/:/transcode/universal/stop?autoAdjustQuality=0&hasMDE=1&location=lan&mediaBufferSize=157248&path=%2Flibrary%2Fmetadata%2F4100&session=ee6446c38224b36d-com-plexapp-android (8 live) TLS GZIP 2ms 379 bytes (pipelined: 1)
Feb 06, 2023 09:52:52.196 [0x7fac384a0b38] DEBUG - Request: [192.168.178.200:56504 (Allowed Network (Subnet))] GET /video/:/transcode/universal/decision?audioBoost=100&autoAdjustQuality=0&directPlay=0&directStream=1&directStreamAudio=1&fastSeek=1&hasMDE=1&location=lan&maxVideoBitrate=200000&mediaBufferSize=157248&mediaIndex=0&partIndex=0&path=%2Flibrary%2Fmetadata%2F4103&protocol=*&session=ee6446c38224b36d-com-plexapp-android&subtitleSize=100&videoBitrate=200000&videoQuality=100&videoResolution=3840x2160 (9 live) #2db14 TLS GZIP Signed-in
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: Selected protocol hls; container: mkv
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: analyzing media item 6445
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: E1 - Show: Direct Play is disabled
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: E1 - Show: media must be transcoded in order to use the hls protocol
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: E1 - Show: no direct play video profile exists for http/mkv/hevc
Feb 06, 2023 09:52:52.255 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: E1 - Show: no direct play video profile exists for http/mkv/hevc/eac3
Feb 06, 2023 09:52:52.256 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: Cannot direct stream audio stream due to codec eac3 when profile only allows aac
Feb 06, 2023 09:52:52.256 [0x7fac384a0b38] DEBUG - [Req#2db14/Transcode] MDE: Show: selected media 0 / 6445
PS: If it makes a difference, I have plex pass also

