I installed openCV 3.1.0 and anaconda 3. I was able to open images. However, when I tried to play this avi file, an error was displayed on the console. error: /Users/travis/miniconda3/conda-bld/opencv_1489542914304/work/opencv-3.1.0/modules/imgproc/src/imgwarp.cpp:3229: error: (-215) ssize.area() > 0 in function resize. Moreover, cap.isOpen() returned True.
import cv2
import numpy as np
body_classifier = cv2.CascadeClassifier('haarcascade_fullbody.xml')
cap = cv2.VideoCapture('walking.avi')
while cap.isOpened():
ret, frame = cap.read()
frame = cv2.resize(frame, None,fx=0.5, fy=0.5, interpolation = cv2.INTER_LINEAR)
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
bodies = body_classifier.detectMultiScale(gray, 1.2, 3)
for (x,y,w,h) in bodies:
cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 255), 2)
cv2.imshow('Pedestrians', frame)
if cv2.waitKey(1) == 13: #13 is the Enter Key
break
cap.release()
File "<ipython-input-1-f44aabb31ae2>", line 18, in <module> frame = cv2.resize(frame, None,fx=0.5, fy=0.5, interpolation = cv2.INTER_LINEAR)