Toggling between two videos in array with GLvideo

everyday90

need a bit of help with this code. I'm trying to adapt a sketch I made originally for my laptop with the video library. It's pretty simple, I'm reading the values 1 and 0 from the serial port and switching between two synched clips each time there's a change. I'm not having such successful results trying to recreate this with GLVideo however, which I've never used before. hopefully I can fairly easily achieve what I want?

thanks for any help you might have

 import processing.serial.*;
 Serial myPort;
 int val=0;
 import gohai.glvideo.*;
 GLMovie[]video = new GLMovie [2];
 int i =0;

 void setup() {
   fullScreen(P2D);
   String portName = Serial.list()[0];
   myPort= new Serial (this, portName,115200);
   video [0] = new GLMovie(this, "low.mp4");
   video [1] = new GLMovie (this, "high.mp4");
   video [i].loop(); 
 }

 void draw() {
  image(video[i],0,0,width,height); 
  if (video[i].available()) {
     video[i].read(); 
   }
 } 
   void serialEvent(Serial p) {
     if (myPort.available()>0) {
       val=myPort.read();
       println(val); 
 }
 if (val==0) {
   i=1;
 }
 else {
   i=0;
 }
   }

kfrajer

Not sure about GLvideo... it is possible you got this from an old post. Check these next posts and give it a try. If you get stuck, provide a minimum example showing your problem and provide relevant details:

https://forum.processing.org/two/discussion/23419/video-play-random-video-sequence#latest

https://forum.processing.org/two/discussion/22640/can-anyone-help-me-find-what-s-wrong-with-my-code-for-a-video-player-based-off-sensor-reading#latest

Kf

gohai

@everyday90

On a cursory glance, this looks good to me. You'll get better performance if you always erase the background inside draw, since this signals to the renderer that it doesn't need to keep around the previous frame content any longer, so:

void draw() {
  background(0);
  if (video[i].available()) {
    video[i].read();
  }
  image(video[i], 0, 0);
}

everyday90

Added the background line but so far I'm only getting a succesful response from one of the two videos (apparently whichever one corresponds to the correct value of i at at the beginning of the sketch) while the counterpart just returns a black screen. Have tried it with several different clips and this is the case each time.

kfrajer

Notice line 14. You are calling loop only for i=0. Try calling loop() for both videos.

A quick simple check to see if your movies are working would be to play one movie at the time. However, I don't think the problems are your movies.

Also, I don't think you need to check if myport.available() inside the serialEvent() function as this function is called every time data arrives at the serial port.

Kf