Developing multimedia applications with  JMF         T.G.Venkatesh      
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JMF Control
ØFrameGrabbingControl : This  control is used to grab a still video frame from the video stream.
ØFrameRateControl : You can specify the frame rate using this control.
ØMonitorControl : Some capture devices or encoders may allow you to monitor ( view/ listen ) to the capture or encoding progress through this control.
ØQualityControl : Some JMF objects such as encoders allow you to control the quality of the media they deliver using this control.
ØSilenceSuppressionControl : is a Control for specifying the parameters for silence suppression.
ØStreamWriterControl : This interface is implemented by a Multiplexer or DataSink to enable controlling the number of bytes generated as output.
•Method of using the control :
•QualityControl    qc =  (QualityControl)  processor.getControl         ( "javax.media.control.QualityControl” );
•float quality = qc.setQuality( 0.3f ) ;
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