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Python Version/ffglitch/jscripts/Stop.js

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+// dd_RandomDamage(stopXY).js
+// stop x and y component of mv for n framesif threshold met for frame
+
+let threshold = 95;
+var TRIGGERED = 0;
+var nFrames = 10;
+var frameCount = 0;
+
+function glitch_frame(frame)
+{
+
+	var do_or_not = Math.random() * 100;
+	if(do_or_not > threshold){
+		if(TRIGGERED > 0){
+
+		}else{
+			TRIGGERED = 1;
+			frameCount = 0;
+		}
+	}
+	// only do the glitch if our random number crosses the threshold
+	if(TRIGGERED > 0 & frameCount <= nFrames){
+		frameCount++;
+
+		// bail out if we have no motion vectors
+		let mvs = frame["mv"];
+		if ( !mvs )
+			return;
+		// bail out if we have no forward motion vectors
+		let fwd_mvs = mvs["forward"];
+		if ( !fwd_mvs )
+			return;
+
+		var M_H = fwd_mvs.length/2;
+		// clear horizontal element of all motion vectors
+		for ( let i = 0; i < fwd_mvs.length; i++ )
+		{
+			// loop through all rows
+			let row = fwd_mvs[i];
+			var M_W = row.length/2;
+
+			for ( let j = 0; j < row.length; j++ )
+			{
+				// loop through all macroblocks
+				let mv = row[j];
+
+				// THIS IS WHERE THE MAGIC HAPPENS
+				// STOP XY
+				mv[0] = 0;
+				mv[1] = 0;
+			}
+		}
+	}else{
+		TRIGGERED = 0;
+	}
+}