I’m trying to convert Hellboy (original) to mp4 format for playback on mobile device. Everytime I try, with different encoding settings, the audio comes out with a weird sound/buzz and pops. The DVD itself does not have this problem when played. I’m thinking its some sort of copy protection, but no other movie I’ve tried has ever had this issue. Does anyone have any tips? If you have Hellboy I would be interested to know if you have the same problem (you can do a quick test by just ripping one chapter).