39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
import cv2 as cv
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import numpy as np
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cap = cv.VideoCapture("./vid/zootopia.mkv")
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ret, frame1 = cap.read()
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prvs = cv.cvtColor(frame1, cv.COLOR_BGR2GRAY)
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hsv = np.zeros_like(frame1)
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hsv[..., 1] = 255
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print("jump ahead")
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cap.set(cv.CAP_PROP_POS_FRAMES, 59760)
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print("jump done")
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while(1):
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for i in range(1, 12):
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cap.read()
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ret, frame2 = cap.read()
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next = cv.cvtColor(frame2, cv.COLOR_BGR2GRAY)
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flow = cv.calcOpticalFlowFarneback(
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prvs, next, None, 0.5, 3, 15, 3, 5, 1.2, 0)
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mag, ang = cv.cartToPolar(flow[..., 0], flow[..., 1])
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hsv[..., 0] = ang*180/np.pi/2
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hsv[..., 2] = cv.normalize(mag, None, 0, 255, cv.NORM_MINMAX)
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bgr = cv.cvtColor(hsv, cv.COLOR_HSV2BGR)
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cv.namedWindow("frame2", cv.WINDOW_NORMAL)
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cv.namedWindow("frame", cv.WINDOW_NORMAL)
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cv.imshow('frame2', bgr)
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cv.imshow("frame", frame2)
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cv.waitKey(1)
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#k = cv.waitKey(0.1) & 0xff
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# if k == 27:
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# break
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# elif k == ord('s'):
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# cv.imwrite('opticalfb.png',frame2)
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# cv.imwrite('opticalhsv.png',bgr)
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prvs = next
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cap.release()
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cv.destroyAllWindows()
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