Online classroom video live broadcast system and method based on classroom old equipment

The invention relates to an online classroom video live broadcast system based on existing camera equipment in a classroom. The online classroom video live broadcast system comprises a gateway serverconnected with the camera equipment, a video stream transmission server connected with the gateway server and a video stream server connected with the video stream transmission server, wherein the gateway server is used for converting the audio and video data generated by the camera equipment into an audio and video stream based on an rtmp protocol; the video stream transmission server is used fortransmitting the audio and video stream based on the rtmp protocol to the video stream server; and the video stream server is used for converting the audio and video stream based on the rtmp protocolinto video data based on the hls protocol and responding to a playing request of a user. The invention also provides a live broadcast method. The live broadcast system and the live broadcast method in the embodiment of the inv