OpenCV 3.0 VideoCapture doesn't open video file in Java

Question

OpenCV 3.0 with Java cannot open video file, but it woks with camera. Before I was using OpenCV 3.0-beta it was working well in both, but in OpenCV 3.0 which is released on

Answer 1

Even after adding C:\opencv\build\x64\vc12\bin to SYSTEM path, if you cannot open VideoCapture then you could also try coping opencv_ffmpegXXX_64.dll from opencv/build/java/x64 or from opencv\build\x64\vc14\bin. I don't know why this works but it worked for me after trying:

https://stackoverflow.com/a/29920295/677185 and https://github.com/opencv/opencv/issues/4974

Answer 2

I solved my problem like this: Copy the C:\opencv\build\x64\vc12\bin to the system path and restart the Eclipse.

Hope this help someone that may has this problem with OpenCV 3.0.

Answer 3

Generally opencv_ffmpegXXX.dll file not placed at opencvjavaXXX.dll file folder so you need to load two library in java code

You should have try this.

System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // for OpencvjavaXXX.dll 

System.loadLibrary("opencv_ffmpeg320_64"); // for OpenCV_ffmpegXXX.dll file 

You can specify full DLL file path into the (string) parameter