I am running processing with an Arduino board. The arduino has scrolling values in its serial monitor read from an analogue input. Processing is due to read them and play a video back at a speed corresponding to these arduino values. (low value = slow vid; High value = fast vid).

Here is my code. (it used to work but stopped when installed on new PC)

// importing the processing serial class
import processing.serial.*;
import processing.video.*;
Movie myMovie;
float filmSpeed = 0.5;

// variables for serial connection, portname and baudrate have to be set
 Serial port;
 String portname = "COM3";  
 int baudrate = 9600;
 int value = 0;  

void setup(){
 // set size and frameRate
 size(500,500);
 background(0);
 myMovie = new Movie(this, "treeMotionJpeg.mov");
 myMovie.speed(filmSpeed);
 myMovie.loop();
 println(Serial.list());
 // establish serial port connection      
 port = new Serial(this, portname, baudrate);
 
}

void draw(){
 image(myMovie, 0, 0);
 // listen to serial port and trigger serial event  
 while(port.available() > 0){
       value = port.read();
       filmSpeed = value / 8;
       myMovie.speed(filmSpeed);
       
       println(value);}
}  

void movieEvent(Movie m) {
 m.read();
}


The error I get is:


gnu.io.PortInUseException: Unknown Application
at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:354)
at processing.serial.Serial.<init>(Serial.java:136)
at processing.serial.Serial.<init>(Serial.java:102)
at windmillProcessingTotal.setup(windmillProcessingTotal.java:43)
at processing.core.PApplet.handleDraw(PApplet.java:1383)
at processing.core.PApplet.run(PApplet.java:1311)
at java.lang.Thread.run(Unknown Source)
Exception in thread "Animation Thread" java.lang.RuntimeException: Error inside Serial.<init>()
at processing.serial.Serial.errorMessage(Serial.java:588)
at processing.serial.Serial.<init>(Serial.java:148)
at processing.serial.Serial.<init>(Serial.java:102)
at windmillProcessingTotal.setup(windmillProcessingTotal.java:43)
at processing.core.PApplet.handleDraw(PApplet.java:1383)
at processing.core.PApplet.run(PApplet.java:1311)
at java.lang.Thread.run(Unknown Source)

I am a processing novice so any help would be much appreciated. I need this to work for an exhibition.

Thanks

No sorry still having problems. I'm waiting on a new computer so will try it on there as soon as possible and let you know.
In the mean time if anyone else has an idea it would be much apreciated.

It might very well be that arduino is connecting to a different COM port than on your old computer since there is no fixed port reserved for arduino (or similar chip sets). So if you have not checked that out yet, it might be worth a look.