+ _label="Frame rate" _low-label="Low" _high-label="High"
+ low="0" high="100000" default="10000" convert="invert"/>
+
+ <number id="duration" type="slider" arg="-duration %"
+ _label="Duration" _low-label="10 seconds" _high-label="10 minutes"
+ low="10" high="600" default="120"/>