+ untestet therefore result open.
+ ffmpeg-3.4.1.tar.bz2 for source files
+ https://trac.ffmpeg.org/wiki/CompilationGuide for executing
configure script. Required vor avconfig
- video capabilities are implemented but not tested by now
- mandelbrot zoom has to be implemented from current render.c just
a single picture is used by now
- libav libraries are required