opencv3 videoCapture (windows) doesn't work

Question

I've a problem with openCV 3 java wrapper.

When i use videocapture, camera.grab() always return false. I see several subjects on internet about this problem. I succeeded to run opencv 2.4 but not with version 3.

My environnement :

• windows 10 (64b)
• java 8u51 (32b)
• eclipse mars (32b)

So, I test these methods. Env :

• Set windows path : D:\\Programs\\opencv3x\\build\\x86\\vc12\\bin
• Add opencv_ffmpeg to D:\\Programs\\opencv3x\\build\\x86\\vc12\\bin (in opencv 3, this lib is already in with the good name : opencv_ffmpeg300.dll).

Dev env : In eclipse project :

• add opencv-300.jar
• set the native lib to D:/Programs/opencv3x/build/java/x86

With this configuration, I can use opencv 3 without problem...but i can't decode video file!

Does anyone have a solution on this? Thx.

Answer 1

https://books.google.co.uk/books?id=LFtICgAAQBAJ&pg=PA41

It might also be the case where the opencv_ffmpeg300 dynamic link library goes missing from your path environmental variable. Try copying it to your project home folder

Copy opencv_ffmpeg300.dll direct to your Eclipse project's home folder ("or add it to your path variable").