Processing: webcam save and playback bug - arrays

Question

I should be beyond this, but I can't get to the bottom of this error. I'm trying to write a sketch that records the feed of my Mac camera and stores each recording "session" into a PImage array, then adds that to a list of sessions (a PImage[] ArrayList). I'm using a 'Replay' class to access the images stored in memory to and replay them at a random position. The code below should be ready to be copied straight into the IDE.
Any help would be greatly appreciated. I have no idea why the replay objects are always displaying the live image. Thanks!
import processing.video.*;
Capture cam;
ArrayList<PImage[]> allImages;
ArrayList<PImage> currentImages;
ArrayList<Replay> replays;
boolean recording = false;
boolean finishedSaving = true;
int currentIndex = 0;
void setup() {
size(1056, 704, P2D);
frameRate(30);
allImages = new ArrayList<PImage[]>();
currentImages = new ArrayList<PImage>();
replays = new ArrayList<Replay>();
String[] cams = Capture.list();
if (cams.length == 0) {
println("No cams!");
exit();
} else {
cam = new Capture(this, 1056, 704, cams[0], 30);
cam.start();
}
}
void draw() {
background(0);
if (cam.available() == true) {
cam.read();
}
for (Replay r : replays) {
r.display();
}
if (recording) {
currentImages.add(cam);
noFill();
stroke(255, 0, 0);
strokeWeight(5);
rect(0, 0, cam.width/3, cam.height/3);
} else {
saveToArray();
}
image(cam, 0, 0, cam.width/3, cam.height/3);
}
void saveToArray() {
if (!finishedSaving) {
PImage[] tempImages = currentImages.toArray(new PImage[currentImages.size()]);
allImages.add(tempImages);
currentImages.clear();
println("Finished saving to allImages array");
println("allImages array size now = " + allImages.size());
replays.add(new Replay(currentIndex));
println("Added new Replay (index: " + currentIndex + ")");
currentIndex++;
finishedSaving = true;
println();
}
}
void keyPressed() {
if (key == 'r' || key == 'R') {
recording = !recording;
println("Recording: " + recording);
finishedSaving = false;
}
}
class Replay {
PVector position;
float w, h;
PImage[] images;
int count;
Replay(int allImagesIndex) {
w = cam.width/3;
h = cam.height/3;
position = new PVector(random(width-w), random(height-h));
count = 1;
images = allImages.get(allImagesIndex);
}
void display() {
image(images[count], position.x, position.y, w, h);
count++;
if (count > images.length-1) count = 1;
}
}

Answer 1

Looks like this was due to the camera feed always being assignment to each individual image. To get a "copy" of the "current" video stream frame, I just added .get() to the feed so it fetches the pixels and stores them in a PImage variable.
currentImages.add(cam.get());