python如何获取一个视频的帧率_python 读取视频,处理后,实时计算帧数fps的方法

实时计算每秒的帧数

cap = cv2.VideoCapture("DJI_0008.MOV")

#cap = cv2.VideoCapture(0)

# Define the codec and create VideoWriter object

#fourcc = cv2.cv.FOURCC(*'XVID')

fourcc = cv2.VideoWriter_fourcc(*'XVID')

out = cv2.VideoWriter('output1.avi', fourcc, 20, (1920, 1080))

num=0

while cap.isOpened():

# get a frame

rval, frame = cap.read()

# save a frame

if rval==True:

# frame = cv2.flip(frame,0)

# Start time

start = time.time()

rclasses, rscores, rbboxes=process_image(frame) #换成自己调用的函数

# End time

end = time.time()

# Time elapsed

seconds = end - start

print( "Time taken : {0} seconds".format(seconds))

# Calculate frames per second

fps = 1 / seconds;

print( "Estimated frames per second : {0}".format(fps));

#bboxes_draw_on_img(frame,rclasses,rscores,rbboxes)

#print(rclasses)

out.write(frame)

num=num+1

print(num)

#fps = cap.get(cv2.CAP_PROP_FPS)

#print("Frames per second using video.get(cv2.CAP_PROP_FPS) : {0}".format(fps))

else:

break

# show a frame

cv2.imshow("capture", frame)

if cv2.waitKey(1) & 0xFF == ord('q'):

break

cap.release()

out.release()

cv2.destroyAllWindows()

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时间： 2018-07-08