int avio_open(AVIOContext **s, const char *url, int flags);int avio_open2(AVIOContext **s, const char *url, int flags,const AVIOInterruptCB *int_cb, AVDictionary **options); 从源码中来看avio_open就是调用avio_open2()来实现的,只是把avio_open2()的最后两个参数置NULL, s:会创建一个A...