I had the same issue, albeit with a HDHR Prime. Plex would debug ‘completed 8% - Recording’ and then fail to start the stream. I created a python shim that might help until Plex provides a permanent fix. It goes in place of ‘Plex Transcoder’ (similar to how Plex Remote Transcoder or Plex Unicorn Transcoder works). The gist of it is Plex times out waiting for a response from Plex Transcoder (ffmpeg) -probesize. This script lowers the value so that Plex receives a response sooner and avoids timing out.
If on linux (it sounds like you are), you would rename the existing ‘Plex Transcoder’ to ‘plex_transcoder’, then place the script and name it ‘Plex Transcoder’ in its place, executable.
