def init_camera(self):
# create the device
self._device = hg.cvCreateCameraCapture(self._index)
# Set preferred resolution
cv.SetCaptureProperty(self._device, cv.CV_CAP_PROP_FRAME_WIDTH,
self.resolution[0])
cv.SetCaptureProperty(self._device, cv.CV_CAP_PROP_FRAME_HEIGHT,
self.resolution[1])
# and get frame to check if it's ok
frame = hg.cvQueryFrame(self._device)
# Just set the resolution to the frame we just got, but don't use
# self.resolution for that as that would cause an infinite recursion
# with self.init_camera (but slowly as we'd have to always get a
# frame).
self._resolution = (int(frame.width), int(frame.height))
# get fps
self.fps = cv.GetCaptureProperty(self._device, cv.CV_CAP_PROP_FPS)
if self.fps <= 0:
self.fps = 1 / 30.
if not self.stopped:
self.start()
def init_camera(self):
# consts have changed locations between versions 2 and 3
if self.opencvMajorVersion in (3, 4):
PROPERTY_WIDTH = cv2.CAP_PROP_FRAME_WIDTH
PROPERTY_HEIGHT = cv2.CAP_PROP_FRAME_HEIGHT
PROPERTY_FPS = cv2.CAP_PROP_FPS
elif self.opencvMajorVersion == 2:
PROPERTY_WIDTH = cv2.cv.CV_CAP_PROP_FRAME_WIDTH
PROPERTY_HEIGHT = cv2.cv.CV_CAP_PROP_FRAME_HEIGHT
PROPERTY_FPS = cv2.cv.CV_CAP_PROP_FPS
elif self.opencvMajorVersion == 1:
PROPERTY_WIDTH = cv.CV_CAP_PROP_FRAME_WIDTH
PROPERTY_HEIGHT = cv.CV_CAP_PROP_FRAME_HEIGHT
PROPERTY_FPS = cv.CV_CAP_PROP_FPS
Logger.debug('Using opencv ver.' + str(self.opencvMajorVersion))
if self.opencvMajorVersion == 1:
# create the device
self._device = hg.cvCreateCameraCapture(self._index)
# Set preferred resolution
cv.SetCaptureProperty(self._device, cv.CV_CAP_PROP_FRAME_WIDTH,
self.resolution[0])
cv.SetCaptureProperty(self._device, cv.CV_CAP_PROP_FRAME_HEIGHT,
self.resolution[1])
# and get frame to check if it's ok
frame = hg.cvQueryFrame(self._device)
# Just set the resolution to the frame we just got, but don't use
# self.resolution for that as that would cause an infinite
# recursion with self.init_camera (but slowly as we'd have to
# always get a frame).
self._resolution = (int(frame.width), int(frame.height))
# get fps
self.fps = cv.GetCaptureProperty(self._device, cv.CV_CAP_PROP_FPS)
elif self.opencvMajorVersion in (2, 3, 4):
# create the device
self._device = cv2.VideoCapture(self._index)
# Set preferred resolution
self._device.set(PROPERTY_WIDTH,
self.resolution[0])
self._device.set(PROPERTY_HEIGHT,
self.resolution[1])
# and get frame to check if it's ok
ret, frame = self._device.read()
# source:
# http://stackoverflow.com/questions/32468371/video-capture-propid-parameters-in-opencv # noqa
self._resolution = (int(frame.shape[1]), int(frame.shape[0]))
# get fps
self.fps = self._device.get(PROPERTY_FPS)
if self.fps == 0 or self.fps == 1:
self.fps = 1.0 / 30
elif self.fps > 1:
self.fps = 1.0 / self.fps
if not self.stopped:
self.start()
