# HG changeset patch
# User Nicolas Saunier <nicolas.saunier@polymtl.ca>
# Date 1464663713 14400
# Node ID 0662c87a61c931cf5bd893d98af07073482b7ee0
# Parent  5b99b676265e7c2e6737e4b515a94cf1f06b03c7
minor modification

diff -r 5b99b676265e -r 0662c87a61c9 python/cvutils.py
--- a/python/cvutils.py	Mon May 30 22:49:24 2016 -0400
+++ b/python/cvutils.py	Mon May 30 23:01:53 2016 -0400
@@ -230,13 +230,13 @@
             ret = False
             capture.set(cv2.CAP_PROP_POS_FRAMES, firstFrameNum)
             frameNum = firstFrameNum
-            while frameNum<=lastFrameNum:
+            while frameNum<=lastFrameNum and frameNum<rawCount:
                 ret, img = capture.read()
                 i = 0
                 while not ret and i<10:
                     ret, img = capture.read()
                     i += 1
-                if img.size>0:
+                if img is not None and img.size>0:
                     if saveImage:
                         frameNumStr = format(frameNum, '0{}d'.format(nDigits))
                         cv2.imwrite(outputPrefix+frameNumStr+'.png', img)