python - cv2.videocapture 不适用于 Raspberry-pi

如何让 cv2.VideoCapture(0) 识别树莓派的 USB 摄像头。

def OnRecord(self, evt):
    capture = cv2.VideoCapture(0)
    if (not capture.isOpened()):
        print "Error"
# video recorder
    fourcc = cv2.cv.CV_FOURCC(*'XVID')  # cv2.VideoWriter_fourcc() does not exist
    video_writer = cv2.VideoWriter.open("output.mp4", fourcc, 20, (640, 480), True)

    # record video
    while (capture.isOpened()):
        ret, frame = capture.read()
        if ret==True:
            video_writer.write(frame)
            cv2.imshow('Video', frame)
        else:
            break

def OnCancel(self, evt):
    capture.release()
    video_writer.release()
    cv2.destroyAllWindows()

但它只打印错误。

所以我想捕获没有打开。可能是什么原因？

我从 opencv 文档中尝试了这段代码，但对我没有用。

import numpy as np
import cv2

cap = cv2.VideoCapture(0)

# Define the codec and create VideoWriter object
fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('output.avi',fourcc, 20.0, (640,480))

while(cap.isOpened()):
    ret, frame = cap.read()
    if ret==True:
        frame = cv2.flip(frame,0)

        # write the flipped frame
        out.write(frame)

        cv2.imshow('frame',frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break

# Release everything if job is finished
cap.release()
out.release()
cv2.destroyAllWindows()

任何帮助将不胜感激。

最佳答案

为 linux 驱动程序加载正确的视频。

sudo modprobe bcm2835-v4l2

关于python - cv2.videocapture 不适用于 Raspberry-pi，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38302161/