The issue I mentioned earlier here
https://forum.doom9.org/showthread.p...56#post1820856 still exists in latest beta.
Now, the srt file attachments in mentioned post still await approval(??) but thing is that, when wanting to create xml/png I first have to export as SUP, thereafter convert with BDSup2Sub.
As said, this tool (BDSup2Sub) has a sort-of frame-timings issue/bug, in that sense, that you have to specifically check the "Change frame rate" box and state both FPS Source and FPS Target rates, if a framerate other than 23.976 is used in both source and target fps.
If you are using BDSup2Sub internally in SE for xml/png export, can you "force tell" the tool to use this FPS Source/Target setting?