possible arbitrary code execution cannot be ruled out in some cases
precautionary checks
Originally committed as revision 3813 to svn://svn.ffmpeg.org/ffmpeg/trunk
Get libavformat linked with lavc and lmp3lame is required. BeOS requires no undefined syms on link! (besides it's bad to leave undef syms)
Originally committed as revision 3696 to svn://svn.ffmpeg.org/ffmpeg/trunk