Any chance that cvQueryFrame() returns an image that you should not free?? When you do twice:
img = cam.queryFrame() img = cam.queryFrame() the first img is likely garbage-collected. Perhaps your Image.__dealloc__ is not doing the right thing in this case? Could you try to do: cam = cvCreateCameraCapture(0) img1 = cam.queryFrame() img1.show() img2 = cam.queryFrame() and tell me if this also fails? On Tue, May 19, 2009 at 9:57 PM, Chris Colbert <[email protected]> wrote: > oops, sorry, I wrote the wrong things (it's getting late : ) > > i'm actually erring on this > > ######### typdef ############ > > cdef class CvCapture: > > cdef c_highgui.CvCapture* thisptr > > # convienience functions > > def queryFrame(self): > # get and return an IplImage from from a capture source > # equivalent to img = cvQueryFrame(CvCapture* capture) > # make sure to set capture width and height before calling this > cdef c_cxcore.IplImage* img > cdef IplImage pyimg = IplImage() > img = c_highgui.cvQueryFrame(self.thisptr) > pyimg.thisptr = img > return pyimg > > def __dealloc__(self): > c_highgui.cvReleaseCapture(&self.thisptr) > > > def cvCreateCameraCapture(device): > cdef c_highgui.CvCapture* cap = c_highgui.cvCreateCameraCapture(device) > cdef CvCapture pycap = CvCapture() > pycap.thisptr = cap > return pycap > > #################### > > python code > > cam = cvCreateCameraCapture(0) > img = cam.queryFrame() > img.show() <----- this works fine > img = cam.queryFrame() <---------- I crash here > > > sorry for the confusion > > > Chris > > > _______________________________________________ > Cython-dev mailing list > [email protected] > http://codespeak.net/mailman/listinfo/cython-dev > > -- Lisandro Dalcín --------------- Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC) Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) PTLC - Güemes 3450, (3000) Santa Fe, Argentina Tel/Fax: +54-(0)342-451.1594 _______________________________________________ Cython-dev mailing list [email protected] http://codespeak.net/mailman/listinfo/cython-dev
