Opencv-python: cv::VideoWriter::open VIDEOIO(CV_IMAGES): raised OpenCV exception:

[milansoliya4210]

Expected behavior

I am using Opencv Python version 4.1.2.30 for write image to video as mention in code but unfortunately when I run Script in Pycharm it run correctly but when I convert script to EXE from pyinstaller with PYQT5 its give me error like as below.
'

Actual behavior

[ERROR:0] global C:\projects\opencv-python\opencv\modules\videoio\src\cap.cpp (392) cv::VideoWriter::open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.1.2) C:\projects\opencv-python\opencv\modules\videoio\src\cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): Detected_video.avi in function 'cv::icvExtractPattern

Steps to reproduce

• example code
  pathIn = IMG_OUTPUT_FOLDER image_interval = 1 # Interval between two images fps = 1 / image_interval files = video_df frame_array = [] for i in range(len(files.index)): img_name = files.loc[i, 'Image_Name'] filename = os.path.join(pathIn, img_name) # reading each files img = cv2.imread(filename) height, width, layers = img.shape size = (width, height) # inserting the frames into an image array frame_array.append(img) os.chdir(VIDEO_OUTPUT_FOLDER) out = cv2.VideoWriter("Detected_video.avi", cv2.VideoWriter_fourcc(*'DIVX'), fps, size) for i in range(len(frame_array)): # writing to a image array out.write(frame_array[i]) out.release() os.chdir(CWD_PATH)
• operating system
  windows 10
• architecture (e.g. x64)
• opencv-python version 4.1.2.30

[skvark]

Only reason I can think of is that PyInstaller does not copy the FFmpeg dll during the packaging process.

If you have a look at e.g. ...Python37\Lib\site-packages\cv2 folder, there is something like opencv_videoio_ffmpeg412_64.dll next to cv2.cp37-win_amd64.pyd.

Does the opencv_videoio_ffmpeg412_64.dll file exist in the package which was created in PyInstaller? If not, add it to the spec file (binaries): https://pyinstaller.readthedocs.io/en/stable/spec-files.html#spec-file-operation

[gersonmlb]

Hello, I do not know if you can explain a little more please, because I did not understand much, I have the same problem and try to apply the solution but I still get the same error.

[aanchal9202]

opencv_videoio_ffmpeg412_64.dll file exist in the package which was created in PyInstaller
but still i get error

[skvark]

This is not PyInstaller support forum. Please open an issue to PyInstaller repository if you encounter issues with PyInstaller.

[partykiev]

Check if the path to the video file is correct or files exist. This mistake appears when you try implement .shape to the empty frame Also it is possible if a variable was inited inside an internal function and you try to call it otside