Write to a different file on each iteration

Question

I want to save images to a new file on each iteration:

 str1='vid_result'
 str2=str1+str(ret)
 cv2.imwrite(str(str2),im)

Where ret is a counter.

But I receive the error:

Could not find a writer for the specified extension in function cv::imwrite_.

Actually, cv2.imwrite('vid_result',im) works fine, so I need to find a proper way to send a filename as a first argument.

P.S. The str2 is a string and its output is vid_result1.

if `str2` is a string already (which it seems to be) what is the point of `str(str2)`? In any event -- what *is* `str2`? — John Coleman, Jul 22 '16 at 01:39
@JohnColeman, It's a string, i did that to ensure myself that it IS a string — , Jul 22 '16 at 01:42
Why no file extension in the file name? Something like `.csv`? — John Coleman, Jul 22 '16 at 03:48
show the actual code with full traceback, and put a print statement of str2 right before it fails — joel goldstick, Jul 22 '16 at 13:07

score -1 · Answer 1 · answered Jul 22 '16 at 01:41

-1

It sounds ("writer for the specified extension") like it is trying to figure out how to write the image based on the file name and failing. Print out the value of str2 and I think that will make the problem obvious.

answered Jul 22 '16 at 01:41

Michael Lorton

43,060
26
103
144

this seems more like a comment than an answer – John Coleman Jul 22 '16 at 01:42

Write to a different file on each iteration

1 Answers1