I do not understand what you are asking. ffmpeg-devel is only for patch submissions and discussions related to the development of FFmpeg.
Questions involving the FFmpeg command-line interface tools should be asked at the ffmpeg-user mailing list. Questions involving the FFmpeg libraries should be asked at the libav-user mailing list. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel