Have you tried Rip Blu-Ray? Rip Blu-Ray and general DVD to almost all the popular video and audio formats with high quality and converting speed.
This iToolsoft Blu-Ray DVD Ripper helps you share your Blu-Ray and general DVD movie or music on more portable players, like iPod, iPhone, Gphone, Apple TV, PSP/PS3, Xbox, Mobile Phone, Mp3 Player.
Only get the part you like by setting the begin and end time for the conversion through the preview window and also can capture the beuatilful pictures of movie.
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More details, please go to Blu-Ray Ripper - software wikipedia
Good luck to you !