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comparison python/cvutils.py @ 967:373e8ef6ee25

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modified function to access video property
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Tue, 05 Dec 2017 16:15:44 -0500
parents 4f32d82ca390
children 5d788d2e8ffc
comparison
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966:40af0f20ee2d 967:373e8ef6ee25
188 cv2.cv.CV_CAP_PROP_FRAME_HEIGHT: "heigh", 188 cv2.cv.CV_CAP_PROP_FRAME_HEIGHT: "heigh",
189 cv2.cv.CV_CAP_PROP_FRAME_WIDTH: "width", 189 cv2.cv.CV_CAP_PROP_FRAME_WIDTH: "width",
190 cv2.cv.CV_CAP_PROP_RECTIFICATION: "rectification", 190 cv2.cv.CV_CAP_PROP_RECTIFICATION: "rectification",
191 cv2.cv.CV_CAP_PROP_SATURATION: "saturation"} 191 cv2.cv.CV_CAP_PROP_SATURATION: "saturation"}
192 capture = cv2.VideoCapture(filename) 192 capture = cv2.VideoCapture(filename)
193 videoProperties = {}
193 if capture.isOpened(): 194 if capture.isOpened():
194 for cvprop in [#cv2.cv.CV_CAP_PROP_BRIGHTNESS 195 for cvprop in [#cv2.cv.CV_CAP_PROP_BRIGHTNESS
195 #cv2.cv.CV_CAP_PROP_CONTRAST 196 #cv2.cv.CV_CAP_PROP_CONTRAST
196 #cv2.cv.CV_CAP_PROP_CONVERT_RGB 197 #cv2.cv.CV_CAP_PROP_CONVERT_RGB
197 #cv2.cv.CV_CAP_PROP_EXPOSURE 198 #cv2.cv.CV_CAP_PROP_EXPOSURE
211 #cv2.cv.CV_CAP_PROP_SATURATION 212 #cv2.cv.CV_CAP_PROP_SATURATION
212 ]: 213 ]:
213 prop = capture.get(cvprop) 214 prop = capture.get(cvprop)
214 if cvprop == cv2.cv.CV_CAP_PROP_FOURCC and prop > 0: 215 if cvprop == cv2.cv.CV_CAP_PROP_FOURCC and prop > 0:
215 prop = int2FOURCC(int(prop)) 216 prop = int2FOURCC(int(prop))
216 print('Video {}: {}'.format(cvPropertyNames[cvprop], prop)) 217 videoProperties[cvPropertyNames[cvprop]] = prop
217 else: 218 else:
218 print('Video capture for {} failed'.format(filename)) 219 print('Video capture for {} failed'.format(filename))
220 return videoProperties
219 221
220 def getImagesFromVideo(videoFilename, firstFrameNum = 0, lastFrameNum = 1, step = 1, saveImage = False, outputPrefix = 'image'): 222 def getImagesFromVideo(videoFilename, firstFrameNum = 0, lastFrameNum = 1, step = 1, saveImage = False, outputPrefix = 'image'):
221 '''Returns nFrames images from the video sequence''' 223 '''Returns nFrames images from the video sequence'''
222 images = [] 224 images = []
223 capture = cv2.VideoCapture(videoFilename) 225 capture = cv2.VideoCapture(videoFilename)