Movian

After having started using opensubtitles in Showtime I've realized that a lot of times the only subs in the correct framerate are in "sub" format and aren't rendered by Showtime, although they're listed and selectable in the subtitles list created by the opensubtitles plugin.

A .sub that's manually downloaded into the movie directory is not shown, while an .srt is ("external").

It seems .sub to .srt conversion is straightforward, the difference being in whether the timing is in seconds or frames. I've used the Python script available here successfully on one of the above mentioned subs and the resulting srt is shown correctly by Showtime: https://github.com/robelix/sub2srt

Example .sub attached.