Method and system for monitoring video with single path of video and multiple paths of audio

A system for video surveillance comprising:

• a client end, configured to interact with a device end by a process of Real Time Streaming Protocol, request single channel of video and multiple channels of audio from the device end, and receive Real-time Transfer Protocol packets of the single channel of video and of the multiple channels of audio, distinguish the video from the audio according to payload type values in the Real-time Transfer Protocol packets, distinguish individual channels of audio according to modified synchronous source values in the Real-time Transfer Protocol packets of the multiple channels of audio, also play the video and/or the audio of a corresponding channel according to a user's demand;
• and
• the device end, configured to interact with the client end by the process of Real Time Streaming Protocol, randomly generate, for each channel of audio, a corresponding modified synchronous source value to be written into an Real-time Transfer Protocol packet, send the corresponding modified synchronous source value of each channel of audio to the client end, and capture the single channel of video and the multiple channels of audio, generate an Real-time Transfer Protocol packet of the single channel of video and send the same to the client end, generate an Real-time Transfer Protocol packet of each channel of audio including an initial synchronous source value, and after modifying the initial synchronous source value in the Real-time Transfer Protocol packet of each channel of audio to the corresponding modified synchronous source value, send the Real-time Transfer Protocol packet of each channel of audio including the modified synchronous source value to the client end, wherein each Real-time Transfer Protocol packet includes a payload type value distinguishing video from audio.