- saturation
- Color purity. A completely pure color has 100 percent saturation. The less saturation, the closer the color appears to gray.
- SECAM
- Analog composite color television standard, with a rate of 25 frames per second, and 50 fields per second. Much of Europe, Australia, and other parts of the world use SECAM.
- seekable renderer
- A renderer that reports EC_COMPLETE when all seekable streams on that filter have reached the end of the stream.
- servo
- The electromechanical system that maintains the proper speed and phase of a VCR's video head and tape transport.
- sink file
- The current file into which media samples will be written.
- source filter
- A filter that takes data from some source such as the hard drive, network, or the Internet, and introduces it into the filter graph.
- smart recompression
- Decompressing and recompressing a source file only when its format does not match the output format.
- stream notification
- An event that occurs in the media stream and is passed from one filter to the next.
- stream time
- The time since the filter graph was last started. By definition, stream time equals reference time minus the previous start time. Stream time is relevant only in a running filter graph.
- subtype
- A GUID value that describes the specific format of media data for a data stream. Also called minor type.
- synchronization point
- A media sample that can be decoded without examining any other samples. For example, a key frame.