sources to build the objects out of tree. To do this, use an absolute
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 3.81 first.
+2) Then type 'make' to build FFmpeg. GNU Make 3.81 or later is required.
3) Type 'make install' to install all binaries and libraries you built.