Jdeuce21

I have started my project over twice trying to get all my bookmarks to turn into chapters. First couple had 13 and only 7 worked. After the 7th it just froze the Blu Ray. On my last attempt I dropped down to just 7 bookmarks and still it froze at the same point in my video as when it had 13. Any advice?? Seems like it is freezing around the 50 minute mark and the video is around 140 minutes.