See Also
 Important: |
|---|
| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
After raw bytes have been pulled into the graph, either from a local file or capture card or some other source, the bytes must be parsed into meaningful units, called media samples. Sometimes a source filter does the parsing, and sometimes a separate parsing filter performs this task. In DirectShow, a media sample is wrapped in a COM object that implements the IMediaSample2 Interface. In addition to the actual multimedia data, the object contains information including the specific media type and the synchronization times. A media sample object containing video data holds the data for one video frame. For audio, a media sample object holds the data for several audio samples. In either case, when data moves downstream through a graph from one filter to the next, it is in the form of media sample objects.