Here are a few title options, keeping in mind the question-and-answer format: * OpenCV 2.4 VideoCapture Not Working on Windows: Why and How to Fix It? * Why Does VideoCapture Fail on Windows with Ope

VideoCapture Not Working on Windows with OpenCV 2.4

When using Python bindings for OpenCV 2.4 on Windows, some users encounter issues with VideoCapture not functioning correctly when accessing video files. While reading from the webcam (using index 0) works without issue, attempting to open a file using VideoCapture(filename) yields a consistent False return value.

This problem stems from a missing dependency. To resolve it, ensure that the following path is added to the Windows PATH environment variable:

C:\OpenCVrdparty\ffmpeg\

If you cannot modify the PATH variable, you can alternatively copy the opencv_ffmpeg.dll file from the aforementioned directory to either C:Python27 or to a directory that is in the PATH.

Note that you may need to rename the opencv_ffmpeg.dll file depending on the OpenCV version you are using:

• For OpenCV version X.Y.Z: opencv_ffmpeg.dll should be renamed to opencv_ffmpegXYZ.dll.
• For 64-bit OpenCV version X.Y.Z: opencv_ffmpeg.dll should be renamed to opencv_ffmpegXYZ_64.dll.

After implementing one of these solutions, the VideoCapture functionality should work as expected when opening video files on Windows machines.

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