上QQ阅读APP看书,第一时间看更新
How to do it...
The steps for this recipe are:
- First, let's create a VideoCapture object and obtain the total number of frames:
import cv2
capture = cv2.VideoCapture('../data/drop.avi')
frame_count = int(capture.get(cv2.CAP_PROP_FRAME_COUNT))
print('Frame count:', frame_count)
- Get the total number of frames:
print('Position:', int(capture.get(cv2.CAP_PROP_POS_FRAMES)))
_, frame = capture.read()
cv2.imshow('frame0', frame)
- Note that the capture.read method advances the current video position one frame forward. Get the next frame:
print('Position:', capture.get(cv2.CAP_PROP_POS_FRAMES))
_, frame = capture.read()
cv2.imshow('frame1', frame)
- Let's jump to frame position 100:
capture.set(cv2.CAP_PROP_POS_FRAMES, 100)
print('Position:', int(capture.get(cv2.CAP_PROP_POS_FRAMES)))
_, frame = capture.read()
cv2.imshow('frame100', frame)
cv2.waitKey()
cv2.destroyAllWindows()