It looks like someone uploaded 6.1.0 to mingw-builds.
download page "patch"
Do you have a sample? I found some but they didn't play but it didn't cause a crash...
[mpeg4 @ 0168bb00]AVFrame.format is not set
dongsheng-daily has 6.x, but I personally would like to see a refresh of 5.3.x/5.4...