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