yhea its incorrectly reportin audio decoding acapabilities, stinn unsure on how to resolve this but keepin eye out, Like this workaround thoughHi, if you have not found I solution to your problem (or if anyone else stumbles upon this issue), my novice research has led me to believe that this appears to be an issue with certain boxes (had the same issue on my A95X).
The box reports to Plex that it can support the codecs however there seem to be output issues with them (no idea what as the original Android 6 rom it came with did not appear to have this issue), this issue creeps up on numerous roms I have tried.
There is a "solution" to the problem (more like a workaround), as follows:
1. You need root access
2. Disable passthrough in Plex
3. Force close Plex app and Clear Cache
4. Edit the following file (either copy the file over and edit and copy back or directly edit on box): /data/data/com.plexapp.android/shared_prefs/com.plexapp.android.xml
5. make sure the following are false (to be on the safe side you can "false" out DTS, TrueHD and whatever else you find in there related to audio codec support )
<boolean name=“general.deviceSupportsEAC3” value=“false” />
<boolean name=" general.deviceSupportsAC3" value=“false" />
This seems to force Plex to transcode audio to AAC.
There have been some reports that once you play a file successfully following the above steps, force closing plex/clearing cache and reediting the file makes Plex behave normally (i.e. playback of EAC3 without transcoding), however I have not tested this myself yet.