2 <effect tag="threshold" id="threshold">
4 <description>Make monochrome clip</description>
5 <author>Charles Yates</author>
6 <parameter type="constant" name="midpoint" max="255" min="0" default="128">
7 <name>Threshold value</name>
9 <parameter type="bool" name="use_alpha" default="0">
10 <name>Use transparency</name>