Server Version#: 1.24.4.5081
Player Version#: 5.25.3
When playing a movie with unsupported audio (which is transcoded to AAC) and SRT subtitle file, then the movie WILL START to play for exactly X minute and Y seconds (I presume it depends on the streamed bytes amount), but any movie will play for X minutes and Y seconds (obviously different values for each movie, but same amount every time played), transcoding is intermittent, most probably background (invisible) buffering is requesting it normally…
BUT then playback stops, visible buffering occurs, Plex Server (on Windows) will start to transcode continuously until Playback Error message on the TV. Other players will play correctly, so issue is with tizen app.