Hi I'm using M1 Macbook Pro 2021 with Monterey OS.
I've been trying to use my mac's internal webcam with OpenCV C++ VideoCapture class on Visual Studio Code, but i keep getting this weird errors. I've given both terminal and iTerm access to the Camera on my Mac's Preferences, but it still keeps giving me this error.
This is my Code,
#include <iostream>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
void camera_in()
{
VideoCapture cap;
cap.open(2, CAP_AVFOUNDATION);
if (!cap.isOpened())
{
cerr << "Camera open failed!" << endl;
return;
}
cout << "Frame width: " << cvRound(cap.get(CAP_PROP_FRAME_WIDTH)) << endl;
cout << "Frame height: " << cvRound(cap.get(CAP_PROP_FRAME_HEIGHT)) << endl;
Mat frame, inversed;
while (true)
{
cap >> frame;
if (frame.empty())
break;
inversed = ~frame;
imshow("frame", frame);
imshow("inversed", inversed);
if (waitKey(10) == 27)
break;
}
destroyAllWindows();
}
int main()
{
camera_in();
}
And this is the error i get from executing it.
2022-08-05 18:15:01.284398+0900 video[7664:45504] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x10b54c320> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2022-08-05 18:15:01.291647+0900 video[7664:45504] HALC_ProxyObjectMap::_CopyObjectByObjectID: failed to create the local object
2022-08-05 18:15:01.291664+0900 video[7664:45504] HALC_ShellDevice::RebuildControlList: couldn't find the control object
2022-08-05 18:15:01.316885+0900 video[7664:45504] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x10c50bb40> 30010C1C-93BF-11D8-8B5B-000A95AF9C6A
I ran this code on my macbook pro m1 14" and it was working, I had to change:
cap.open(2, CAP_AVFOUNDATION);
to:
cap.open(0, CAP_AVFOUNDATION);
for it to work though (0 is the index of the built in webcam).
Related
I am trying to use the sample code to get image via the embedded camera of my laptop. I can get the image. But the imshow statement throw Access violation executing
Anyone can help me to figure out the reason?
Deeply appreciate!
Environment: Visual Studio 2015, Opencv 3.2
c++ code:
using namespace cv;
using namespace std;
int main(int, char**)
{
Mat frame;
VideoCapture cap;
cap.open(0);
if (!cap.isOpened())
{
cerr << "ERROR, unable to open the camera\n";
return -1;
}
std::cout << "start grapping" << endl;
for (;;)
{
cap.read(frame);
if (frame.empty())
{
cerr << "ERROR, blank frame grabbed \n";
break;
}
// I added below statement to save the frame.
// check the frame from the camera.
imwrite("D:\\CapturedImage.jpg", frame);
// Below line throw Access violation executing location error
imshow("Live", frame);
}
}
I have a raspberry pi b+ uploading a video stream with the mjpeg-streamer.
On the Raspberry Pi
/usr/local/bin/mjpg_streamer -i "/usr/local/lib/input_uvc.so -y -r 340x240 -f 10 -d /dev/video0" -o "/usr/local/lib/output_http.so -w /usr/local/www"
This creates a video stream accessible by
http://10.1.111.150:8080/?action=stream
making a jpeg image ->
Live stream on the firefox browser
Now, what I would like to do is open this stream with OpenCV 3.0.0 in Visual Studio 2013.
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char* argv[])
{
int q;
VideoCapture cap;
//cap.open(0) for internal camera
//
cap.open("http://10.1.111.150:8080/?action=stream");
if (!cap.isOpened()) // if not success, exit program
{
cout << "Cannot open the video cam" << endl << "Press q to continue:";
cin >> q;
return -1;
}
double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH); //get the width of frames of the video
double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); //get the height of frames of the video
cout << "Frame size : " << dWidth << " x " << dHeight << endl;
namedWindow("MyVideo", CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
namedWindow("MyNegativeVideo", CV_WINDOW_AUTOSIZE);
while (1)
{
Mat frame;
Mat contours;
bool bSuccess = cap.read(frame); // read a new frame from video
if (!bSuccess) //if not success, break loop
{
cout << "Cannot read a frame from video stream" << endl;
break;
}
flip(frame, frame, 1);
imshow("MyVideo", frame); //show the frame in "MyVideo" window
Canny(frame, contours, 500, 1000, 5, true);
imshow("MyNegativeVideo", contours);
if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
{
cout << "esc key is pressed by user" << endl;
break;
}
}
return 0;}
This is an example code that works to open the internal webcam on my laptop when I usecap.open(0)
But trying to open the ip camera from its addresscap.open("http://10.1.111.150:8080/?action=stream");
is not working.
UPDATE
I've made some changes on the RPi by running
/usr/local/bin/mjpg_streamer -i "/usr/local/lib/input_uvc.so -y -r 340x240 -f 10 -d /dev/video0" -o "/usr/local/lib/output_rtsp.so -p /usr/local/www"
the difference being the output_rtsp.so -p
By the looks the webcam (active light is on) and the program running in the raspberry pi's terminal, I can assume the stream is working. I can't confirm this through a browser though.
Running
cap.open("rtsp://10.1.111.150:8080/?action=stream");
in the openCV code does not open the stream.
Can anyone tell me where I'm going wrong?
I tried the following code for capturing a video from my webcam:
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace cv;
using namespace std;
int main()
{
VideoCapture cap(0); // open the video camera no. 0
if (!cap.isOpened()) // if not success, exit program
{
cout << "Cannot open the video cam" << endl;
return -1;
}
double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH); //get the width of frames of the video
double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); //get the height of frames of the video
cout << "Frame size : " << dWidth << " x " << dHeight << endl;
namedWindow("MyVideo", CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
namedWindow("Changed", CV_WINDOW_AUTOSIZE);
while (1)
{
Mat frame;
bool bSuccess = cap.read(frame); // read a new frame from video
if (!bSuccess) //if not success, break loop
{
cout << "Cannot read a frame from video stream" << endl;
break;
}
Mat imgH = frame + Scalar(75, 75, 75);
imshow("MyVideo", frame); //show the frame in "MyVideo" window
imshow("Changed", imgH);
if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
{
cout << "esc key is pressed by user" << endl;
break;
}
}
return 0;
}
Now here's my problem:
After debugging that program for the first time everything works as expected. But when debugging for a second time (after changing some lines in the code) it cannot read from the camera.
Does anyone have a hint for me how to solve that problem?
Thanks!
The code you posted seems to be working absolutely fine in my case, and the output is as intended.
However please make sure that your webcam is switched on before you run the program, this is important.
Since i have a YouCam client in my computer for the webcam, therefore it shows that i need to start youcam.
Since i dont have enough reputation to post an image, so please see the following link in order to view the output i got when webcam not already switched on.
http://i.imgur.com/h4bTZ7z.png
Hope this helps!!
I am trying to run a opencv program. I have configured opencv accordingly but I am getting the Visual Studio 2012 error "The application was unable to start correctly (0xc0000007b)."
Following is the code I am trying to run.
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char* argv[])
{
VideoCapture cap(0); // open the video camera no. 0
if (!cap.isOpened()) // if not success, exit program
{
cout << "Cannot open the video file" << endl;
return -1;
}
//get the width of frames of the video
double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH);
//get the height of frames of the video
double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT);
cout << "Frame size : " << dWidth << " x " << dHeight << endl;
namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
while (1)
{
Mat frame;
bool bSuccess = cap.read(frame); // read a new frame from video
if (!bSuccess) //if not success, break loop
{
cout << "Cannot read a frame from video file" << endl;
break;
}
imshow("MyVideo", frame); //show the frame in "MyVideo" window
//wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
if (waitKey(30) == 27)
{
cout << "esc key is pressed by user" << endl;
break;
}
}
return 0;
}
You are probably not including all of your libraries properly. Use Dependency Walker to check whether you are missing anything.
I'm trying to capture frames from a Macbook Pro's iSight using OpenCV 2.4.6, and built using the Apple LLVM 4.2 compiler on Xcode.
However, I don't receive any frames. Usually I set up a while loop to run until the frame is full, but the one below runs for ~30 seconds with no result. How can I debug this?
void testColourCapture() {
cv::VideoCapture capture = cv::VideoCapture(0); //open default camera
if(!capture.isOpened()) {
fprintf( stderr, "ERROR: ColourInput capture is NULL \n" );
}
cv::Mat capFrame;
int frameWaits = 0;
while (capFrame.empty()) {
capture.read(capFrame);
//capture >> capFrame;
cvWaitKey(30);
frameWaits++;
std::cout << "capture >> capFrame " << frameWaits << "\n";
if (frameWaits > 1000) {
break;
}
}
imshow("capFrame", capFrame);
}
I have ensured it is not multi-threaded. Also, capture.isOpened is always returning true.
EDIT: It appears others have had this problem: OpenCV wont' capture from MacBook Pro iSight
EDIT: My procedure for installing opencv was:
$ sudo port selfupdate
$ sudo port install opencv
Then, I dragged libopencv_core.dylib, libopencv_highgui.dylib, libopencv_imgproc.dylib and libopencv_video.dylib into the Frameworks folder of my Xcode project, from /opt/local/lib
OpenCV 2.4.6 is broken and doesn't work with the iSight camera. So install 2.4.5 instead. I've written a step-for-step guide for this: http://accidentalprogramming.blogspot.ch/2013/10/opencv-installation-on-mac-os-x.html
I got it working with following code:
VideoCapture cap = VideoCapture(0); // open the video file for reading
if ( !cap.isOpened() ) // if not success, exit program
{
cout << "Cannot open the video file" << endl;
return -1;
}
//cap.set(CV_CAP_PROP_POS_MSEC, 300); //start the video at 300ms
double fps = cap.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Frame per seconds : " << fps << endl;
namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
while(1)
{
Mat frame;
bool bSuccess = cap.read(frame); // read a new frame from video
if (!bSuccess) //if not success, break loop
{
cout << "Cannot read the frame from video file" << endl;
break;
}
imshow("MyVideo", frame); //show the frame in "MyVideo" window
if(waitKey(30) == 27) //wait for 'esc' key press for 30 ms. If 'esc' key is pressed, break loop
{
cout << "esc key is pressed by user" << endl;
break;
}
}