first of all - kudos on an excellent app. I've found a tiny flaw in the implementation of PGS subtitle overlays. if you rip a 1080p Bluray disc to a 720p mkv file, the PGS subtitles are preserved untouched, but they still contain the 1080p screen position coordinates. When you view the video, the subtitle appears aligned to the bottom right. All of the geometry controls for the subtitle work except position. You can scale it up and down but it just grows from the bottom right corner. VLC does this as well.
It would be great if you could tweak it so the the position / centering function worked for PGS subtitles when they're used on resized video.
let me know if you need a test sample.
thanks again for the app