rds

I'm in the same boat using using Photostage 10.82 on an iMac OS 10.13.6. When exporting to data disc or a video file everything looks good. Exporting to .iso file or DVD the transitions are black for the duration that it was set. Has anyone found a solution? Currently I'm exporting to a mp4 video data disk file and burning a DVD with a different application that has limited encoding. The higher level encoding was one of the reasons that I purchased Photostage.