[Python] Capture images from RTSP stream

I want to extract frames from an RTSP camera stream stored with timestamp and date every minute, for 24 hours. How do I go about this? My code:

imagesFolder = "C:/Users/<user>/documents"
cap = cv2.VideoCapture("rtsp://usernameassword@cameraIP/axis-media/media.amp")
frameRate = cap.get(5) #frame rate
count = 0

while cap.isOpened():
frameId = cap.get(1) # current frame number
ret, frame = cap.read()

if (ret != True):
break
if (frameId % math.floor(frameRate) == 0):
filename = imagesFolder + "/image_" + str(datetime.now().strftime("%d-%m-%Y_%I-%M-%S_%p")) + ".jpg"
cv2.imwrite(filename, frame)

cap.release()
print ("Done!")

cv2.destroyAllWindows()

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