Assembly: System.Windows (in System.Windows.dll)
It is possible for a MediaStreamSource to seek to a position in-between two key frames. To do so, a MediaStreamSource implementation would report the key frame and the subsequent p-frames, even though they have timestamps prior to the seek point. Those samples would not be rendered, but they would be used to help decode the later samples that are rendered. For example, those whose timestamps are at or after the seek point.
For more information on common issues related to seek, see Troubleshooting Media Issues.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.