This field is used to set RTP-specific parameters in the Play response.
A mapping from RTP timestamps to NTP timestamps (wall clock) is available via RTCP. However, this information is not sufficient to generate a mapping from RTP timestamps to NPT. Furthermore, in order to ensure that this information is available at the necessary time (immediately at startup or after a seek), and that it is delivered reliably, this mapping is placed in the RTSP control channel.
In order to compensate for drift for long, uninterrupted presentations, RTSP clients should additionally map NPT to NTP, using initial RTCP sender reports to do the mapping, and later reports to check drift against the mapping.

public class RtpInfo : BaseHeader

Public Class RtpInfo
	Inherits BaseHeader

public ref class RtpInfo : public BaseHeader

type RtpInfo =  
    class
        inherit BaseHeader
    end