How to take a screenshot of desktop fast with Java in Windows (ffmpeg, etc.)?

Question

I would like to use java to take a screenshot of my machine using FFMPEG or some other solution. I know linux works with ffmpeg without JNI, but running it in Windows does n

Answer 1

You will need to use JNI or JNA to call some combination of CreateCompatibleBitmap, XGetImage, DirectX or OpenGL to grab a screenshot and then copy some raw bitmap data back to Java. My profiling showed a speed up of about 400% over the Robot class when accessing raw bitmap data on X11. I have not tested other platforms at this time. Some very early code is available here but I haven't had much time to work on it recently.