In order to facilitate some early testing before making releases on March 31, checked into GIT, the ffmpeg's team version 8.1 with our 13 patches as checked by Andrew-R.  I verified that bluray and dvd creation worked correctly (since I may be the only person who still uses it) and compiled ffmpeg 8.1 on regular laptop with older Fedora, Ubuntu 16, and Debian 9.1 32-bit; all of which had nasm updated to 2.15.05 version as required for ffmpeg 8.1. 

On Ubuntu16 a problem with libaom v3.8.0, that I thought was fixed with patch 0011-libaom-3.8.0-ubuntu-16.04-fix.patch, is still an issue but OK as I have been making the Appimage there using libaom v3.4.0 anyway.  Will test again to see what I might have done by mistake.