Acquiring Both Video and Audio Bitstreams
In case AudioIn is on and a client requests a video stream, the camera simultaneously transmits the
video stream and an audio stream in an RTSP session. The following captured packets show an example
of simultaneous video bitstream and audio bitstream acquisition from the camera.
As you can see in the example, session descriptions in RTSP response to "DESCRIBE" request contains
two media descriptions — the first one is for video, the second one is for audio.
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