/**
 * 按幀錄制本機攝像頭視頻（邊預(yù)覽邊錄制，停止預(yù)覽即停止錄制）
 * 
 * @author eguid
 * @param outputFile -錄制的文件路徑，也可以是rtsp或者rtmp等流媒體服務(wù)器發(fā)布地址
 * @param frameRate - 視頻幀率
 * @throws Exception
 * @throws InterruptedException
 * @throws org.bytedeco.javacv.FrameRecorder.Exception
 */
public static void recordCamera(String outputFile, double frameRate){
    //另一種方式獲取攝像頭，opencv抓取器方式獲取攝像頭請參考第一章，F(xiàn)rameGrabber會自己去找可以打開的攝像頭的抓取器。
	FrameGrabber grabber = FrameGrabber.createDefault(0);//本機攝像頭默認(rèn)0
	grabber.start();//開啟抓取器

	OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();//轉(zhuǎn)換器
	IplImage grabbedImage = converter.convert(grabber.grab());//抓取一幀視頻并將其轉(zhuǎn)換為圖像，至于用這個圖像用來做什么？加水印，人臉識別等等自行添加
	int width = grabbedImage.width();
	int height = grabbedImage.height();

	FrameRecorder recorder = FrameRecorder.createDefault(outputFile, width, height);
	recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264); // avcodec.AV_CODEC_ID_H264，編碼
	recorder.setFormat("flv");//封裝格式，如果是推送到rtmp就必須是flv封裝格式
	recorder.setFrameRate(frameRate);
	
	recorder.start();//開啟錄制器
	long startTime=0;
	long videoTS=0;
	CanvasFrame frame = new CanvasFrame("camera", CanvasFrame.getDefaultGamma() / grabber.getGamma());
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.setAlwaysOnTop(true);
	Frame rotatedFrame=converter.convert(grabbedImage);//不知道為什么這里不做轉(zhuǎn)換就不能推到rtmp
	while (frame.isVisible() && (grabbedImage = converter.convert(grabber.grab())) != null) {
       
		rotatedFrame = converter.convert(grabbedImage);
		frame.showImage(rotatedFrame);
		if (startTime == 0) {
			startTime = System.currentTimeMillis();
		}
		videoTS = 1000 * (System.currentTimeMillis() - startTime);
		recorder.setTimestamp(videoTS);
		recorder.record(rotatedFrame);
		Thread.sleep(40);
	}
	frame.dispose();//關(guān)閉窗口
	recorder.close();//關(guān)閉推流錄制器，close包含release和stop操作
	grabber.close();//關(guān)閉抓取器

}

public static void main(String[] args) throws Exception, InterruptedException, org.bytedeco.javacv.FrameRecorder.Exception {
	recordCamera("output.mp4",25);
}

public static void main(String[] args) throws Exception, InterruptedException, org.bytedeco.javacv.FrameRecorder.Exception {
	recordCamera("rtmp://192.168.30.21/live/record1",25);
}

看到了攝像頭窗口就說明已經(jīng)開始錄制，點擊右上角關(guān)閉按鈕即停止錄制視頻，在錄制的時候刷新項目目錄發(fā)現(xiàn)新生成了一個output.mp4文件，可以正常播放這個視頻文件