Error could not find a writer....

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python

asked Nov 29 '16

Katie
16 ●1 ●2 ●5

updated Nov 29 '16

berak
32993 ●7 ●81 ●312

import cv2 

# 0 is refrencing first camera
camera = cv2.VideoCapture(0)

# range is repeating the indented code by whatever is in ()
for i in range(2):
    return_value, img = camera.read()
    cv2.imshow('opencv'+str(i)+'png',img)
    cv2.imwrite('opencv'+str(i)+'png',img)
cv2.waitKey()
del camera

It keeps telling me " error: (-2) could not find a writer for the specified extension in function cv:: imwrite_"

Any ideas why?

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answered Nov 29 '16

berak
32993 ●7 ●81 ●312

updated Nov 29 '16

oh, that's a simple one:

you want to write opencv13.png, but forgot to put a dot between filename and extension

 filename = 'opencv'+str(i)+'.png'
 cv2.imwrite(filename, img) #  .png !
 cv2.imshow(filename, img)  # don't replicate

will do the trick ;)

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Thank you!

Katie (Nov 30 '16)edit

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Asked: Nov 29 '16

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Last updated: Nov 29 '16

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