ffmpg库的源码

代码说明：

FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * Read the file COPYING. ffmpeg and the associated libraries EXCEPT   liba52 and libpostproc are licensed under the Lesser GNU General   Public License. * liba52 and libpostproc are distributed under the GNU General Public   License and their compilation and use is optional in ffmpeg. Fabrice Bellard.