) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.
Processing video library using GStreamer 1.16.2
OpenCV for Processing 0.5.4 by Greg Borenstein [http://gregborenstein.com](http://gregborenstein.com)
Using Java OpenCV 2.4.5.0
Load cascade from: /Users/richardmead/Documents/Processing/libraries/opencv\_processing/library/cascade-files/haarcascade\_frontalface\_alt.xml
Cascade loaded: haarcascade\_frontalface\_alt.xml
BaseSrc: [avfvideosrc0] : Device video access permission has just been denied
Could not run the sketch (Target VM failed to initialize).
For more information, read revisions.txt and Help → Troubleshooting.”
```auto
import gab.opencv.*;
import processing.video.*;
import java.awt.*;
Capture video;
OpenCV opencv;
void setup() {
size(640, 480);
video = new Capture(this, 640/2, 480/2);
opencv = new OpenCV(this, 640/2, 480/2);
opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);
video.start();
}
void draw() {
scale(2);
opencv.loadImage(video);
image(video, 0, 0 );
noFill();
stroke(0, 255, 0);
strokeWeight(3);
Rectangle[] faces = opencv.detect();
for (int i = 0; i < faces.length; i++) {
rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height);
}
}
void captureEvent(Capture c) {
c.read();
}
```
---
### Author:  [@glv](https://discourse.processing.org/u/glv)
#### Post date: [October 26, 2021, 10:17pm UTC](https://discourse.processing.org/t/process-crashes-java/33077/2 "2021-10-26T22:17:25Z")
Hello,
The code provided works here with:
- Processing 3.5.4
- Logitech C922
- W10
It thinks the corner of a piece of furniture is a face!
With Processing 4.0b2:
Try a search for this if you are using a Mac::
“BaseSrc: [avfvideosrc0] : Device video access permission has just been denied”
`:)`
---
### Author:  [@RMead](https://discourse.processing.org/u/RMead)
#### Post date: [October 27, 2021, 9:22am UTC](https://discourse.processing.org/t/process-crashes-java/33077/3 "2021-10-27T09:22:57Z")
I’m using 3.5.4 - I’m not technically minded enough to use the beta haha!
Ahh - any idea what to change to do the inbuilt camera on a Mac? I’m so confused!
---
### Author:  [@glv](https://discourse.processing.org/u/glv)
#### Post date: [October 27, 2021, 10:17am UTC](https://discourse.processing.org/t/process-crashes-java/33077/4 "2021-10-27T10:17:26Z")
Hello,
Resources here:
[https://processing.org/](https://processing.org/)
Video is in the libraries section:
[https://processing.org/reference/libraries/video/index.html](https://processing.org/reference/libraries/video/index.html)
Example of how to detect cameras:
This would be my “Logitech QuickCam Pro 9000”:
```auto
cam = new Capture(this, cameras[1]);
```
`:)`
---
### Author:  [@RMead](https://discourse.processing.org/u/RMead)
#### Post date: [October 29, 2021, 8:41am UTC](https://discourse.processing.org/t/process-crashes-java/33077/5 "2021-10-29T08:41:16Z")
> [@glv](#):
>
> `cam = new Capture(this, cameras[1]);`
Hey, thanks for the reply! This is insane for my first coding thing - especially since I failed maths at High School!
SO, for the below code, where would I add the [0] for the Facetime built in cam? I’m going mad haha
```auto
import gab.opencv.*;
import processing.video.*;
import java.awt.*;
Capture video;
OpenCV opencv;
void setup() {
size(640, 480);
video = new Capture(this, 640/2, 480/2);
opencv = new OpenCV(this, 640/2, 480/2);
opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);
video.start();
}
void draw() {
scale(2);
opencv.loadImage(video);
image(video, 0, 0 );
noFill();
stroke(0, 255, 0);
strokeWeight(3);
Rectangle[] faces = opencv.detect();
for (int i = 0; i < faces.length; i++) {
rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height);
}
}
void captureEvent(Capture c) {
c.read();
}
```
---
### Author:  [@glv](https://discourse.processing.org/u/glv)
#### Post date: [October 30, 2021, 10:47am UTC](https://discourse.processing.org/t/process-crashes-java/33077/6 "2021-10-30T10:47:54Z")
> [@RMead](#):
>
> SO, for the below code, where would I add the [0] for the Facetime built in cam? I’m going mad haha
When the madness subsides… go to to the link I provided and explore.
Each of these lines has a link with details:
`:)`