I have written an open source video player and image viewer (sourceforge.net/project/mrviewer) and I am looking to add support for playing DVDs (first unencrypted, then encrypted -- first without navigation, later with). The viewer is based around ffmpeg which already supports unencrypted VOBs. I am hoping I can plug dvdread to play all the VOBs together and to unencrypt them if needed. But I need some help as I don't know where to begin. All help is appreciated.