有关使用opencv读取视频的问题
在这段代码中,它将整个视频显示为一个帧,但最后它也会在最后一帧返回无有关使用opencv读取视频的问题,opencv,Opencv,在这段代码中,它将整个视频显示为一个帧,但最后它也会在最后一帧返回无 cap = cv2.VideoCapture("demo.mp4") while(cap.isOpened()): status, frame = cap.read() gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) cv2_imshow(gray) if cv2.waitKey(1) & 0xFF == ord('q'): break cap.r
cap = cv2.VideoCapture("demo.mp4")
while(cap.isOpened()):
status, frame = cap.read()
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2_imshow(gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
error: OpenCV(4.1.2) /io/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'
这显示为一个错误 这可以通过如下方式稍微修改代码来解决,即确保框架不为空:
cap = cv2.VideoCapture("demo.mp4")
while(cap.isOpened()):
status, frame = cap.read()
if status:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2_imshow(gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
break
cap.release()
cv2.destroyAllWindows()
谢谢@ashwinjoseph