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frame size specification for video sources in video.py

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This commit is contained in:
Alexander Mordvintsev 2011-09-22 12:32:37 +00:00
parent 823b6567a3
commit 39268013d5
1 changed files with 21 additions and 14 deletions

33
samples/python2/video.py

@ -101,25 +101,32 @@ presets = dict(
def create_capture(source = 0, fallback = presets['chess']): def create_capture(source = 0, fallback = presets['chess']):
''' '''
source: <int> or '<int>' or '<filename>' or 'synth:<params>' source: <int> or '<int>|<filename>|synth [:<param_name>=<value> [:...]]'
''' '''
cap = None source = str(source).strip()
chunks = source.split(':')
# hanlde drive letter ('c:', ...)
if len(chunks) > 1 and len(chunks[0]) == 1 and chunks[0].isalpha():
chunks[1] = chunks[0] + ':' + chunks[1]
del chunks[0]
source = chunks[0]
try: source = int(source) try: source = int(source)
except ValueError: pass except ValueError: pass
else: params = dict( s.split('=') for s in chunks[1:] )
cap = cv2.VideoCapture(source)
if cap is None: cap = None
source = str(source).strip() if source == 'synth':
if source.startswith('synth'): Class = classes.get(params.get('class', None), VideoSynthBase)
ss = filter(None, source.split(':'))
params = dict( s.split('=') for s in ss[1:] )
try: Class = classes[params['class']]
except: Class = VideoSynthBase
try: cap = Class(**params) try: cap = Class(**params)
except: pass except: pass
if cap is None: else:
cap = cv2.VideoCapture(source) cap = cv2.VideoCapture(source)
if not cap.isOpened(): if 'size' in params:
w, h = map(int, params['size'].split('x'))
cap.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, w)
cap.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, h)
if cap is None or not cap.isOpened():
print 'Warning: unable to open video source: ', source print 'Warning: unable to open video source: ', source
if fallback is not None: if fallback is not None:
return create_capture(fallback, None) return create_capture(fallback, None)