path when launching 'configure', e.g. '/ffmpegdir/ffmpeg/configure'.
2) Then type 'make' to build FFmpeg. On BSD systems, type 'gmake'
-instead of 'make'. You may need to install GNU Make first.
+instead of 'make'. You may need to install GNU Make 3.81 first.
3) Type 'make install' to install all binaries and libraries you built.