如何使用ffmpeg

https://blog.csdn.net/minger1202/article/details/52468986  解码

https://www.jianshu.com/p/c6cfe2edd083  解码和播放

https://blog.csdn.net/luckypeng/article/details/51308259

https://www.jianshu.com/p/299906d4054d

https://blog.csdn.net/whoyouare888/article/details/98870898