场景：读取本地文件
错误：

error while decoding MB 98 45, bytestream -6
error while decoding MB 64 60, bytestream -8
error while decoding MB 73 52, bytestream -12
missing picture in access unit with size 12116
 No start code is found.
 Error splitting the input into NAL units.

解决办法：
读取文件时调用av_usleep(1000)

总结：不管读取本地还是网络视频，都不能一股脑读取，中间需要sleep