S

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.