"not enough values to unpack"

[chrisbuckleycode]

Does this work for current python3 and module versions?

I got the following output when running it. My mp4 is in 720p and the subtitles fall within the default box values:

Traceback (most recent call last):
File "./jyutping.py", line 167, in
main()
File "./jyutping.py", line 146, in main
text = extractor.extract(frame)
File "/home/user/python/add-jyutping-master/extract.py", line 47, in extract
self.cleaned = self.clean_image(img)
File "/home/user/python/add-jyutping-master/extract.py", line 112, in clean_image
return self.clean_after_crop(cropped)
File "/home/user/python/add-jyutping-master/extract.py", line 175, in clean_after_crop
img = super().clean_after_crop(cropped)
File "/home/user/python/add-jyutping-master/extract.py", line 145, in clean_after_crop
img = remove_small_islands(img)
File "/home/user/python/add-jyutping-master/extract.py", line 310, in remove_small_islands
im2, contours, hierarchy = cv2.findContours(img, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
ValueError: not enough values to unpack (expected 3, got 2)

The file I used was downloaded from YouTube. You can try yourself using y2mate site, I tried multiple videos from the YouTube TVB News channel.

[910JQK]

This problem occurs because of an API change of OpenCV. The function findContours used to return 3 values but returns 2 values now (first value was removed). But it isn't a big problem because the removed first value is not used in the code.

You can try to change code such as

im2, contours, hierarchy = cv2.findContours(img, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

_, contours, hierarchy = cv2.findContours(self.thresholded, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)

into

contours, hierarchy = cv2.findContours(img, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

contours, hierarchy = cv2.findContours(self.thresholded, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)