I am using a Raspberry Pi 4 running Raspian and I'm trying to use the official HQ camera with OpenCV to run real-time image recognition and tracking. The problem is that when I try to use the OpenCV Python libraries using the following code (which should just take a picture)
I get an error saying the following
From the error text, the fact that other cameras work with this code, the fact that this camera works with rpicam-hello, and the results of searching the error online, this sounds like a bandwidth problem, but one that I can not figure out how to fix. I have tried updating the python code to include the following lines
Which did nothing. I even tried using opencv with C++ which I expect to be faster (and therefore would be my preferred language if possible) using the following code
Unfortunately, this just sits in the line without doing anything forever. I've tried:
Code:
import cv2video_capture = cv2.VideoCapture(0)assert video_capture.isOpened()ret, frame = video_capture.read()cv2.imshow('frame', frame)video_capture.release()cv2.destroyAllWindows()Code:
(opencvenv) main@raspberrypi:~/Documents/pythonFiles $ python captureFrame.py[ WARN:0@10.257] global cap_v4l.cpp:1134 tryIoctl VIDEOIO(V4L2:/dev/video0): select() timeout.Traceback (most recent call last): File "/home/main/Documents/pythonFiles/captureFrame.py", line 12, in <module> cv2.imshow('frame', frame)cv2.error: OpenCV(4.9.0) /io/opencv/modules/highgui/src/window.cpp:971: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow'Code:
video_capture.set(cv2.CAP_PROP_FOURCC,cv2.VideoWriter_fourcc('M','J','P','G'))video_capture.set(cv2.CAP_PROP_FRAME_WIDTH, 1014)video_capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 540)Code:
#include <stdio.h>#include <stdlib.h>#include <assert.h>#include <opencv4/opencv2/opencv.hpp>using namespace cv;using namespace std;int main(int argv, char** argc) { Mat frame; // current frame object VideoCapture vid(0); // video object assert(vid.isOpened()); vid.read(frame); // vid >> frame; // this doest he same thing imshow("Webcam", frame); waitKey(0); return 0;}Code:
VideoCapture vid(0);- I loaded a different program to open an image which worked fine, so I know the opencv libraries are installed correctly.
- I tried the HQ camera with the built in Raspberry Pi test function like rpicam-hello which works, so I know the camera and physical connection are intact
- I tried a different camera which worked, so I know the code isn't faulty
- I tried capping the frame size as shown above
- I tried adding the lines to the uvcvideo module, but I don't even know if this is the right module
Code:
nodrop=1 timeout=5000
Statistics: Posted by klaytonme — Thu Apr 18, 2024 10:26 pm — Replies 0 — Views 26