I use SmartRipper to extract my favourite karaoke song from a DVD using "Chapter by chapter" in vob format, use VOBEdit to join together, extract the audio tracks and subtitle using IfoEdit and recreate the DVD file using "DVD Author" inside Ifoedit . It looks great for the 1st song(including 3 audio effects & 1 subtitle). However, the subtitle of the 2nd song goes to the middle of the 3rd song. What should i do?