I have an .mkv file and trying to add a .srt subtitle file to it for conversion. It's in the same folder and it will play with my MPC Player. It shows the subtitles on the movie while it's playing, but it doesn't show on the mini screen of AVC 18.104.22.168, although it does show that the subtitles has been added to AVC where it says add subtitles. I just say try it and you'll see for yourself. The old version of AVC with the different facing works, but it's too slow.