I’ve just come up w/ a FiFo Queue solution using 2 ArrayDeque containers to store previous video frames of each Movie:
- Docs.Oracle.com/en/java/javase/11/docs/api/java.base/java/util/Queue.html
- Docs.Oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayDeque.html
The trick is to only remove() a PImage frame of each container as a pair when none isEmpty():
- Docs.Oracle.com/en/java/javase/11/docs/api/java.base/java/util/Queue.html#remove()
- Docs.Oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html#isEmpty()
This way the 2 videos are displayed synched to their corresponding frame number.
The sketch can be downloaded on the link below:
And its source code can be viewed on this link here:
And in this forum as well:
/**
* FiFo Sync Frame Pair (v1.0.1)
* GoToLoop (2020/Apr/20)
*
* Discourse.Processing.org/t/read-from-2-videos-at-the-same-time/19937/4
* GitHub.com/GoToLoop/FiFo-Sync-Frame-Pair
*/
import processing.video.Movie;
import java.util.Queue;
import java.util.ArrayDeque;
static final String VID_1 = "videoL1.avi", VID_2 = "videoR1.avi";
static final int W = 1024, H = 768, WW = W >> 1, HH = H >> 1;
final Queue<PImage> framesA = new ArrayDeque<PImage>();
final Queue<PImage> framesB = new ArrayDeque<PImage>();
Movie videoA, videoB;
void settings() {
size(W, HH);
}
void setup() {
videoA = new Movie(this, VID_1);
videoB = new Movie(this, VID_2);
videoA.play();
videoB.play();
}
void draw() {
if (framesB.isEmpty() || framesA.isEmpty()) return;
final PImage frameA = framesA.remove();
final PImage frameB = framesB.remove();
set(0, 0, frameA);
set(WW, 0, frameB);
}
void movieEvent(final Movie m) {
m.read();
final PImage frame = m.get();
frame.resize(WW, HH);
final Queue<PImage> frames = m == videoA? framesA : framesB;
frames.add(frame);
}