Andrew, thanks for checking out ffmpeg 8.1 and providing all of the necessary patches.  I will verify that the DVD and BD creation are working as expected soon.  I have been spending my time on trying to diagnose the Nested EDL undo crashes without much success so far and updating documentation on AppImages in the Manual as prompted by Terje's inquiry.  Currently doing a build in the background with patches 0004-0007 which should present no problems.