在windows下交叉编译ffmpeg时，碰到一些问题，网上未找到完整说明，整理该文档已供有需要的朋友参考-Cross-compile ffmpeg under windows, encounter some problems, the Internet did not find a complete descr iption, finishing the document for a friend in need reference

ffmpeg 的中文说明文档，详细介绍用ffmpeg实现一个播放器的过程。-ffmpeg Chinese documentation, detailing the realization of a player using ffmpeg process.