[ffmpegthumbs/f32] (4 commits) ...Update ffmpegthumbs to 20.08.1
Summary of changes:
0c983cf... - Rebuild for ffmpeg-4.3 git (*)
8bab0b4... - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass (*)
c1b5ac3... Improve compatibility with new CMake macro (*)
89f056d... Update ffmpegthumbs to 20.08.1 (*)
(*) This commit already existed in another branch; no separate mail sent