(-215:Assertion failed) number < max_number in function 'cv::icvExtractPattern' error?

Question

I'm trying to run this python script as an exe file - using pyinstaller, and it raise me this error:

[ERROR:0] global C:\projects\opencv-python\opencv\modules\videoio\src\cap.cpp (415) cv::VideoWriter::open VIDEOIO(CV_IMAGES): raised OpenCV exception: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\videoio\src\cap_images.cpp:267: error: (-215:Assertion failed) number < max_number in function 'cv::icvExtractPattern'

When I'm running it as a python script, it works well. the python script:

SCREEN_SIZE = (1920, 1080)
FPS = 20.0
fourcc = cv2.VideoWriter_fourcc(*"XVID")
out = cv2.VideoWriter("output.avi", fourcc, FPS, SCREEN_SIZE)

I'm using pyinstaller in the command line:

pyinstaller --onefile python_script.py

what should I change to make it work?

Answer 1

This is absolutely crazy, but similar problem was fixed to me by renaming output file. If output filename includes too many digits then this goddamn number validation in cap_images will fail even if I use cv2.VideoWriter

https://github.com/opencv/opencv/blob/4.x/modules/videoio/src/cap_images.cpp

while (pos < len && isdigit(filename[pos]))
        {
            char ch = filename[pos];
            number = (number * 10) + (uint64_t)((int)ch - (int)'0');
            CV_Assert(number < max_number);
            number_str_size++;
            CV_Assert(number_str_size <= 64);  // don't allow huge zero prefixes
            pos++;
        }