1、zlib编译
2、openssl编译
https://blog.csdn.net/liang19890820/article/details/51658574
3、librtmp编译
https://www.jianshu.com/p/cda6aa957a01
编译报错：C1189 #error: Macro definition of snprintf conflicts with Standard Library func
解决方法：找到rtmp_sys.h文件，注释以下内容。
//#define snprintf _snprintf
#define strcasecmp stricmp
#define strncasecmp strnicmp
//#define vsnprintf _vsnprintf
编译报错：C4996 ‘gethostbyname’: Use getaddrinfo() or GetAddrInfoW() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings
解决方法：关闭SDL检测