Each version has various quirks. About 19 other ffms2 versions don't work correctly with PNG or MOV RGBA
I can't find the original github release from way back . Looks like it was taken down and replaced with ffms2-2.23.1-msvc (which doesn't work here either) . But it might mean there are other issues with that build
https://github.com/FFMS/ffms2/releases
Lucky for you I have them saved on a HDD somewhere for exactly these scenarios
https://www.mediafire.com/file/ug0mq...-clang.7z/file