So, I have an iPod touch 4g and want to convert an .avi file to .mp4 so I can play the video on the iPod. Is there any converter out there that lets me do this while also being able to add softsubs to the video? From what I gather, the iPod uses the ttxt format instead of .srt for subtitles. I have yet to find a converter able to add softsubtitles onto an m4v video. Help?