UPDATE #2 – Let’s simplify. I have started over with just the problematic timeline. No menus, no 5.1 audio……
I have built a Blu-ray project with a single timeline containing clip 1.m2v and clip 1.wav. I then import the .txt subtitle track and try to build to folder.
I get – “Blu-ray error: “file already exists”, code “6” , Note: “graphics buffer underflows”
I delete clip 1.m2v from the timeline and then from the project and import clip 2.m2v(older version). I insert it with same .wav and subtitle file into the timeline and build to folder – no problem.
Both files originally started as .mov ProRes 422HD. I used exactly the same (saved) setting to encode 22Mbps 1440×1080 29.97….(although I have tried multiple re-encodes, first to verify file was OK at the same settings then at a lower 18Mbps setting) with AME. The subtitle length is shorter than the timeline. I have a Spanish subtitle track that will output fine with either .m2v but I can see no significant difference between the English and Spanish while they are placed in the timeline.
Can anyone give me any idea what could be causing this conflict. I would love to figure this out.