Calibrate works?

lib/video/examples/Movie/Reverse/Reverse.pde

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+/**
+ * Reverse playback example.
+ *
+ * The Movie.speed() method allows to change the playback speed. 
+ * Use negative values for backwards playback. Note that not all 
+ * video formats support backwards playback. This depends on the 
+ * underlying gstreamer plugins used by gsvideo. For example, the 
+ * theora codec does support backward playback, but not so the H264 
+ * codec, at least in its current version.
+ * 
+ */
+
+import processing.video.*;
+
+Movie mov;
+boolean speedSet = false;
+boolean once = true;
+
+void setup() {
+  size(640, 360);
+  background(0);
+  mov = new Movie(this, "transit.mkv");
+  mov.play();
+}
+
+void movieEvent(Movie m) {
+  m.read();  
+  if (speedSet == true) {
+    speedSet = false;
+  }
+}
+
+void draw() {
+  if (speedSet == false && once == true) {
+    // Setting the speed should be done only once,
+    // this is the reason for the if statement.
+    speedSet = true;
+    once = false;
+    mov.jump(mov.duration());
+    // -1 means backward playback at normal speed.
+    mov.speed(-1.0);
+    // Setting to play again, since the movie stop
+    // playback once it reached the end.
+    mov.play();
+  }
+  image(mov, 0, 0, width, height);
+}   
+