Thank you for your reply very much.

But i found that it didn't work yet.

If I connectted the web camera(not the build-in camera), i can see two cameras:[0] and [1] in processing by println( Capture.list() );

if I call capture with :video=new Capture(this,width,height,30); it by default activate the conectted camera instead of the build-in camera.

if I call capture with:

String ss[]=Capture.list();
video=new Capture(this,width,height,ss[0],30); 

or

String ss[]=Capture.list();
video=new Capture(this,width,height,ss[1],30); 

the connectted camera is activated (the light in it is on) and the error is always "Error while setting up Capture", the light of the build-in camera is off.

Why ?

Help me .

Thank you very much.

Dear, I still could not get a reasonable result. I am not sure whether I understood your comments.

I tried several expressionsbelow, it emits same error: Error while setting up Capture. Also, the connectted camera light is always on, the bild-in camera is always off, no matter [0] or [1] given.

(1):  String ss[]=Capture.list();
  video=new Capture(this,width,height,ss[0],30);

(2):  String ss[]=Capture.list();
  video=new Capture(this,width,height,ss[1],30);

(3):  String ss[]=Capture.list();
  video=new Capture(this,width,height,"[0]",30);

(4):  String ss[]=Capture.list();
  video=new Capture(this,width,height,"[1]",30);

(5):  String ss[]=Capture.list();
  video=new Capture(this,width,height,"ss[0]",30);

(6):  String ss[]=Capture.list();
  video=new Capture(this,width,height,"ss[1]",30);

(7):String ss[]=Capture.list();
  video=new Capture(this,width,height,"[0] USB 视频设备-WDM",30);

(8):String ss[]=Capture.list();
  video=new Capture(this,width,height,"[1] USB 视频设备-WDM",30);

PS: println( Capture.list() ); give below info:

[0] "USB 视频设备-WDM"
[1] "USB 视频设备-WDM"

What should I do ?

Thank you very much.

1. // Work great for mac with Processing 2.0a7
   
2. String[] cameras = Capture.list();
     // Cam Imac Isight
     cam1 = new Capture(this, camx, camy, cameras[0]);
     cam1.start();
     //cam1.settings();
     // Cam usb
     cam2 = new Capture(this, camx, camy, cameras[1]);
     cam2.start();