Imread fails with unknown exception

Python
1

Hi, I am using imread to read .exr images as

img = cv2.imread(img_path, cv2.IMREAD_ANYCOLOR | cv2.IMREAD_ANYDEPTH)

which works most of the time, but sometime randomly it fails with the following error

imread_('filename.exr'): can't read data: unknown exception

I have tried looping over all images multiple times and reading them. Sometimes I am able to read all images without any error, and sometime I get such errors. Any idea why this may be happening or any way I can try and fix this.

2

possible bug. what version of OpenCV do you use? can you provide a minimal reproducible example, including sample data?

3

I am as of this month experiencing the same problem with code that was working before.

I am on:

$ conda list | grep opencv
opencv-python             4.5.4.60                 pypi_0    pypi
opencv-python-headless    4.5.4.60                 pypi_0    pypi

$ python -V
Python 3.8.8

I cv2.imwrite and cv2.imread thousands of .exr files.

I have found that I can sometimes write retry logic that checks if the return from cv2.imread is None and read again successfully. I have also found cases where this doesn’t work. I have found that when I have a file that is never successfully read with cv2.imread I also fail to open that file with Gimp, unlike one of my normal files.

I recently added a check where on the line immediately following cv2.imwrite I attempt a cv2.imread and have had that read fail. I have been wondering if I have a failing drive.

4

I should follow-up to say that I ended up swapping out my RAM And this problem went away. In hindsight my system was suffering other issues related to that bad RAM.