打开wireshark，监听相关网卡，打开rmtp流，利用wireshark进行抓包，有时候分析时可能需要筛选出视频或音频.
- 筛选Video
7.1.5. Video Message (9)
The client or the server sends this message to send video data to the
peer. The message type value of 9 is reserved for video messages.
rtmpt.video.data
或者
rtmpt.header.typeid == 9
筛选视频
- 筛选Audio
7.1.4. Audio Message (8)
The client or the server sends this message to send audio data to the
peer. The message type value of 8 is reserved for audio messages.
rtmpt.audio.data
或者
rtmpt.header.typeid == 8
筛选音频
没有音频的情况
