MediaSampleInfo.DeviceTimeStamp Property
If available, then this is the actual timestamp which the device passed in its frame header.
Syntax: 
[C#]
public TimeSpan DeviceTimeStamp { get; }
Remarks:

This may be unavailable when the device does not support timestamps. Most likely this is in micro seconds.

Information:

This property is deprecated since version 3.5.
Use IFrame.FrameMetadata.

<< MediaSampleInfo