I just installed miro after reading about it on webup8. I immediately started trying to convert my 720p mkv video files into an mp4 format that my nexus7 wouldn't struggle to play. Unfortunately it picks the 'english' audio track instead of the default japanese one that VLC plays, and it gets rid of the english subtitles. Most people would think that was a good thing, but I prefer watching my videos in Japanese. I also tried using winff which did the same thing. Does anyone know a better video converter for ubuntu or how to get one of these to select the audio/subtitle tracks that I want?
Also worth noting that miro can't seem to play the original video, but can play the mp4 file that it generates.