I followed this tutorial https://forum.videohelp.com/viewtopic.php?t=275603 to add a subtitle to my film without losing it's menu and stuff. Completed every step successfully and checked the result on Media Player Classic. It worked fine.

But then i burned it and tryied to play it on my DVD player. Everything but the main movie is working: the menu, the extras, the trailer, everthing. But the main movie plays like 2 seconds then jump to the next scene and plays 2 seconds jump again and keep doing this until the end. I did lots of research and nothing. Any ideas about what it could be?