RTSP视频流地址保存帧图片

我们在对摄像头(如海康、大华)的视频流实现实时监控的过程中，会涉及到抓图的功能，本文并讲述了使用JavaCV对RTSP视频流进行帧截图的工具类的实现。

• pom.xml进入一下包：

<dependency>
	<groupId>net.bramp.ffmpeg</groupId>
	<artifactId>ffmpeg</artifactId>
	<version>0.6.2</version>
</dependency>
		
<dependency>
	<groupId>org.bytedeco</groupId>
	<artifactId>javacv-platform</artifactId>
	<version>1.5.4</version>
</dependency>

<dependency>
	<groupId>org.bytedeco.javacpp-presets</groupId>
	<artifactId>ffmpeg-platform</artifactId>
	<version>4.0.2-1.4.3</version>
</dependency>

• Java代码工具类实现

package com.video.videoimg;

import javax.swing.JFrame;

import org.bytedeco.javacv.CanvasFrame;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.FrameGrabber;
import org.bytedeco.javacv.OpenCVFrameConverter;
import org.bytedeco.opencv.global.opencv_imgcodecs;
import org.bytedeco.opencv.opencv_core.Mat;

import com.missyou.tools.DateHelper;

/***
 * RTSP地址的视频流保存帧图片
 * @author 懒驴
 *
 */
public class RtspVideoSaveImage {
	
	/***
	 * 1.通过RTSP视频地址截图
	 * @param rtspUrl	RTSP视频流地址
	 * @param imgUrl 	图片保存的地址
	 * @return	返回成功失败。true false
	 */
	public static boolean saveScreenshotImg(String rtspUrl, String imgUrl) throws FrameGrabber.Exception {
		FFmpegFrameGrabber grabber = FFmpegFrameGrabber.createDefault(rtspUrl);
		grabber.setOption("rtsp_transport", "tcp"); // 使用tcp的方式，不然会丢包很严重
		grabber.setImageWidth(1920);
		grabber.setImageHeight(1080);
		grabber.start();
		OpenCVFrameConverter.ToMat converter = new OpenCVFrameConverter.ToMat();
		Frame frame = grabber.grabImage();
		Mat mat = converter.convertToMat(frame);
		
		// imgUrl ="E:\\data\\img\\" + DateHelper.getSimpDateMillis() + ".png"
		return opencv_imgcodecs.imwrite(imgUrl, mat);
	}
	
	public static void testzc() throws FrameGrabber.Exception{
		String rtsp = "rtsp://admin:jlhl12345@192.168.1.111/h264/ch35/main/av_stream";
		FFmpegFrameGrabber grabber = FFmpegFrameGrabber.createDefault(rtsp);
		grabber.setOption("rtsp_transport", "tcp"); // 使用tcp的方式，不然会丢包很严重
		grabber.setImageWidth(1920);
		grabber.setImageHeight(1080);
		grabber.start();

		//CanvasFrame canvasFrame = new CanvasFrame("RTSP截图");// 创建窗口
		//canvasFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置窗口关闭程序是否也跟随关闭
		//canvasFrame.setAlwaysOnTop(true);

		OpenCVFrameConverter.ToMat converter = new OpenCVFrameConverter.ToMat();
		Frame frame = grabber.grabImage();
		//canvasFrame.showImage(frame);
        	//程序到这里其实已经实现了预览的功能了，下面的方法就是将流保存成图片


		//opencv_core.Mat
		Mat mat = converter.convertToMat(frame);
		opencv_imgcodecs.imwrite("E:\\data\\img\\" + DateHelper.getSimpDateMillis() + ".png", mat);
		
	}
	/**测试**/
	public static void main(String[] args) {
		try {
			testzc();
		} catch (Exception e) {
			System.out.println(e);
		}
	}
	
}