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comparison python/cvutils.py @ 821:26daf35180ad

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finished modification and demo script to replay synchronized video (with same frame rate)
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 22 Jun 2016 16:36:12 -0400
parents e73e7b644428
children 2faabcbde2c4
comparison
equal deleted inserted replaced
820:e73e7b644428 821:26daf35180ad
144 newCameraMatrix = deepcopy(intrinsicCameraMatrix) 144 newCameraMatrix = deepcopy(intrinsicCameraMatrix)
145 newCameraMatrix[0,2] = newImgSize[0]/2. 145 newCameraMatrix[0,2] = newImgSize[0]/2.
146 newCameraMatrix[1,2] = newImgSize[1]/2. 146 newCameraMatrix[1,2] = newImgSize[1]/2.
147 return cv2.initUndistortRectifyMap(intrinsicCameraMatrix, array(distortionCoefficients), identity(3), newCameraMatrix, newImgSize, cv2.CV_32FC1) 147 return cv2.initUndistortRectifyMap(intrinsicCameraMatrix, array(distortionCoefficients), identity(3), newCameraMatrix, newImgSize, cv2.CV_32FC1)
148 148
149 def playVideo(filenames, windowNames = None, firstFrameNum = 0, frameRate = -1, interactive = False, printFrames = True, text = None, rescale = 1., step = 1): 149 def playVideo(filenames, windowNames = None, firstFrameNums = None, frameRate = -1, interactive = False, printFrames = True, text = None, rescale = 1., step = 1):
150 '''Plays the video(s)''' 150 '''Plays the video(s)'''
151 if len(filenames) == 0:
152 print('Empty filename list')
153 return
151 if windowNames is None: 154 if windowNames is None:
152 windowNames = ['frame{}'.format(i) for i in xrange(len(filenames))] 155 windowNames = ['frame{}'.format(i) for i in xrange(len(filenames))]
153 wait = 5 156 wait = 5
154 if rescale == 1.: 157 if rescale == 1.:
155 for windowName in windowNames: 158 for windowName in windowNames:
160 wait = 0 163 wait = 0
161 captures = [cv2.VideoCapture(fn) for fn in filenames] 164 captures = [cv2.VideoCapture(fn) for fn in filenames]
162 if array([cap.isOpened() for cap in captures]).all(): 165 if array([cap.isOpened() for cap in captures]).all():
163 key = -1 166 key = -1
164 ret = True 167 ret = True
165 frameNum = firstFrameNum 168 nFramesShown = 0
166 for cap in captures: 169 if firstFrameNums is not None:
167 cap.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, firstFrameNum) 170 for i in xrange(len(captures)):
171 captures[i].set(cv2.cv.CV_CAP_PROP_POS_FRAMES, firstFrameNums[i])
168 while ret and not quitKey(key): 172 while ret and not quitKey(key):
169 rets = [] 173 rets = []
170 images = [] 174 images = []
171 for cap in captures: 175 for cap in captures:
172 ret, img = cap.read() 176 ret, img = cap.read()
173 rets.append(ret) 177 rets.append(ret)
174 images.append(img) 178 images.append(img)
175 if array(rets).all(): 179 if array(rets).all():
176 if printFrames: 180 if printFrames:
177 print('frame {0}'.format(frameNum)) 181 print('frame shown {0}'.format(nFramesShown))
178 #if text is not None: 182 for i in xrange(len(filenames)):
179 # cv2.putText(img, text, (10,50), cv2.FONT_HERSHEY_PLAIN, 1, cvRed) 183 if text is not None:
180 for i in xrange(1, len(filenames)): 184 cv2.putText(images[i], text, (10,50), cv2.FONT_HERSHEY_PLAIN, 1, cvRed)
181 cvImshow(windowNames[i], images[i], rescale) 185 cvImshow(windowNames[i], images[i], rescale) # cv2.imshow('frame', img)
182 cvImshow(windowNames[0], images[0], rescale) # cv2.imshow('frame', img)
183 key = cv2.waitKey(wait) 186 key = cv2.waitKey(wait)
184 if saveKey(key): 187 if saveKey(key):
185 cv2.imwrite('image-{}.png'.format(frameNum), img) 188 cv2.imwrite('image-{}.png'.format(frameNum), img)
186 frameNum += step 189 nFramesShown += step
187 if step > 1: 190 if step > 1:
188 for cap in captures: 191 for i in xrange(len(captures)):
189 cap.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, frameNum) 192 captures.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, firstFrameNums[i]+nFramesShown)
190 cv2.destroyAllWindows() 193 cv2.destroyAllWindows()
191 else: 194 else:
192 print('Video captures for {} failed'.format(filenames)) 195 print('Video captures for {} failed'.format(filenames))
193 196
194 def infoVideo(filename): 197 def infoVideo(filename):