i recently got upset when i got error messages like this:
/Repos/slowmoVideo/src/slowmoVideo/lib/ffmpegEncode_sV.c:110: undefined reference to `avformat_alloc_output_context2'
while compiling great opensource stuff which didn't have a debian package.
it's not all about the ffmpeg binary, it's more about the developement and shared libraries. i also noticed some issues going on with blender and this conflicting library.
really, get this things clear now. support both or the original. debian shouldn't become a kindergarten distro.
thanks