我想从名为的视频创建帧project.avi并将它们保存到frameIn文件夹中。但某些类型的错误不让我完成。我怎么解决这个问题。这是代码：
cap = cv2.VideoCapture('project.avi')
currentFrame = 0
while(True):
ret, frame = cap.read()
name = 'frameIn/frame' + str(currentFrame) + '.jpg'
print ("Creating file... " + name)
cv2.imwrite(name, frame)
frames.append(name)
currentFrame += 1
cap.release()
cv2.destroyAllWindows()
错误是：
Traceback (most recent call last):
File "videoreader.py", line 28, in <module>
cv2.imwrite(name, frame)
cv2.error: OpenCV(4.4.0) /private/var/folders/nz/vv4_9tw56nv9k3tkvyszvwg80000gn/T/pip-req-build-2rx9f0ng/opencv/modules/imgcodecs/src/loadsave.cpp:738: error: (-215:Assertion failed) !_img.empty() in function 'imwrite'