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Python Version/ffglitch/jscripts/Vibrate.js

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+var randomness = 10;
+var bias = (randomness/2);
+function glitch_frame(frame)
+{
+    // 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;
+
+    // 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];
+        for ( let j = 0; j < row.length; j++ )
+        {
+            // loop through all macroblocks
+            let mv = row[j];
+
+            // THIS IS WHERE THE MAGIC HAPPENS
+				mv[0] = mv[0] + (Math.floor((Math.random() * randomness) -bias));
+            	mv[1] = mv[1] + (Math.floor((Math.random() * randomness) -bias));
+        }
+    }
+}