Plex stopped playing .ts files
Once upon a time I could play .ts files stored on my Plex server this seems to have stopped working. I can see the TV episodes in the library but now when I try to play them I get the rotating circle. I have Plex Version 18.104.22.16802 installed on a FreeNAS server. All the files are 1080p and the file names are either "name_SXXEXX - YYYY-MM-DD.ts" or "name_YYYY-MM-DD_HH-MM.ts". Other formats eg .mkv at 1080p play successfully. I have looked at the file permissions and this should not be an issue. I have tried various clients including web, ipad and shield all with the same result.
Any help appreciated.