Frame cap read
Thisisthemostconvenientmethodforreadingvideofilesorcapturingdatafromdecodeandreturnsthejustgrabbedframe.Ifnoframeshasbeengrabbed( ...,...frame=cap.read()cv2.imshow('frame',frame)ifcv2.waitKey(1)&0xFF==ord('q'):breakcap.release()cv2.destroyAllWind...
ret,frame=cap.read() 这一行的“”ret,”是什么意思?
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