When I set grabber's ImageMode to FrameGrabber.ImageMode.RAW, the JVM crashes when I call the stop method.
The code looks like this

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(url);
grabber.setImageMode(FrameGrabber.ImageMode.RAW);
grabber.start();
 while((frame = grabber.grabImage()) != null){
                count++;
            }
 grabber.stop();

Drop this line "Comment it out grabber.setImageMode ( FrameGrabber.ImageMode.RAW ); "
Everything is OK