最近项目需要实时直播和回放,集成海康威视摄像头:(适合少量用户,或者内部系统使用)
org.bytedeco
javacv-platform
1.5.1
这里是利用javacv抓取rtsp地址的视频流,通过转换成图片使用websocket实时推送
首先了解rtsp地址,这里举例就用海康威视的规则
通道号下面详细介绍
# 单播
rtsp://{用户名}:{密码}@{IP地址}:{端口号}/Streaming/Channels/{通道号}?transportmode=unicast
# 多播
rtsp://{用户名}:{密码}@{IP地址}:{端口号}/Streaming/Channels/{通道号}?transportmode=multicast
# 分时获取
rtsp://{用户名}:{密码}@{IP地址}:{端口号}/Streaming/tracks/{通道号}?starttime=20191008t063812z&endtime=20191008t064816z
上面地址获取不到时可以试试下面的其他版本地址:
rtsp://{用户名}:{密码}@{IP地址}:{端口号}/Streaming/Unicast/channels/{通道号}
rtsp://{用户名}:{密码}@{IP地址}:{端口号}/h264/{通道号}/main/av_stream
这里通道号分类是IP通道号和模拟通道号,如果是12年以前的老机器,地址建议使用最后一个获取实时视频
可以使用官方提供的java demo 来查看,测试是否能获取视频
这里有打包好的jar包和环境可以直接运行jar包使用,解压后将里面内容放置在System32下,cmd执行jar
地址 https://pan.baidu.com/s/1QxELvKLmgqjeKu6NKUGP0A 密码 67v1
下图就是IP通道号 若只是Camera20 则为模拟通道号
通道号可以参考这里https://www.cnblogs.com/elesos/p/9881690.html
接下来就是java代码:
首先yml配置动态RTSP地址
myconfig:
rtsp: rtsp://%s:%s@%s:%s/Streaming/Channels/%s01
replay-rtsp: rtsp://%s:%s@%s:%s/Streaming/tracks/%s01?starttime=%s&endtime=%s
媒体工具类:
@Slf4j
@Component
public class MediaUtils {
/**
* 直播摄像机id集合,避免重复拉流
*/
private static Set liveSet = new ConcurrentSet<>();
/**
* 用于构造回放rtsp地址
*/
@Value("${myconfig.replay-rtsp}")
private String rtspReplayPattern;
/**
* 视频帧率
*/
public static int frameRate = 15;
/**
* 视频宽度
*/
public static int frameWidth = 480;
/**
* 视频高度
*/
public static int frameHeight = 270;
/**
* 摄像机直播
* @param rtsp 摄像机直播地址
* @param cameraName 摄像机名称
* @param cameraId 摄像机id
* @throws Exception e
*/
@Async
public void live(String rtsp, String cameraName, Long cameraId) throws Exception {
if (liveSet.contains(cameraId)) {
return;
}
liveSet.add(cameraId);
FFmpegFrameGrabber grabber = createGrabber(rtsp);
startCameraPush(grabber, cameraName, cameraId);
}
/**
* 构造视频抓取器
* @param rtsp 拉流地址
* @return
*/
public FFmpegFrameGrabber createGrabber(String rtsp) {
// 获取视频源
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(rtsp);
grabber.setOption("rtsp_transport","tcp");
//设置帧率
grabber.setFrameRate(frameRate);
//设置获取的视频宽度
grabber.setImageWidth(frameWidth);
//设置获取的视频高度
grabber.setImageHeight(frameHeight);
//设置视频bit率
grabber.setVideoBitrate(2000000);
return grabber;
}
/**
* 推送图片(摄像机直播)
* @param grabber
* @throws Exception
*/
@Async
public void startCameraPush(FFmpegFrameGrabber grabber, String cameraName, Long cameraId) throws Exception {
Java2DFrameConverter java2DFrameConverter = new Java2DFrameConverter();
try {
grabber.start();
int i = 1;
while (liveSet.contains(cameraId)) {
Frame frame = grabber.grabImage();
if (null == frame) {
continue;
}
BufferedImage bufferedImage = java2DFrameConverter.getBufferedImage(frame);
byte[] bytes = imageToBytes(bufferedImage, "jpg");
//使用websocket发送图片数据
LiveWebsocket.sendImage(ByteBuffer.wrap(bytes), cameraId);
}
} finally {
if (grabber != null) {
grabber.stop();
}
}
}
/**
* 图片转字节数组
* @param bImage 图片数据
* @param format 格式
* @return 图片字节码
*/
private byte[] imageToBytes(BufferedImage bImage, String format) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
ImageIO.write(bImage, format, out);
} catch (IOException e) {
e.printStackTrace();
}
return out.toByteArray();
}
/**
* 回放视频播放超期检查
* @param userId 用户id
* @return
*/
private boolean replayOverTime(Integer userId) {
if (replayMap.containsKey(userId)) {
Long updateTime = replayMap.get(userId);
if (updateTime != null) {
if (System.currentTimeMillis() - updateTime < 10000) {
return false;
}
}
}
return true;
}
/**
* 构造监控回放查询字段
* @param date 时间
* @param start
* @return
*/
private String formatPullTime(Date date, boolean start) {
Calendar calendar = Calendar.getInstance();
if (date != null) {
calendar.setTime(date);
}
if (start) {
calendar.add(Calendar.SECOND, -10);
} else {
calendar.add(Calendar.SECOND, 10);
}
//海康威视取回放的时间格式
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd#HHmmss$");
String ret = sdf.format(calendar.getTime());
ret = ret.replace("#", "t");
ret = ret.replace("$", "z");
return ret;
}
/**
* 回放视频播放超期检查
* @param userId 用户id
* @return
*/
private boolean replayOverTime(Integer userId) {
if (replayMap.containsKey(userId)) {
Long updateTime = replayMap.get(userId);
if (updateTime != null) {
if (System.currentTimeMillis() - updateTime < 10000) {
return false;
}
}
}
return true;
}
/**
* 监控回放
* @param userId 用户id websocket 用户编号,作为心跳标识检测心跳
* @param startDate 起始时间
* @param endDate 结束时间
* @param channel 通道号
* @param username 用户名
* @param password 密码
* @param ip
* @param port
* @throws Exception e
*/
@Async
public void replayVideo(Integer userId, Date startDate, Date endDate,
Integer channel, String username, String password, String ip, Integer port) throws Exception {
Java2DFrameConverter java2DFrameConverter = new Java2DFrameConverter();
FFmpegFrameGrabber grabber = null;
try {
if (grabber != null) {
grabber.stop();
}
if (channel != null) {
String st = formatPullTime(startDate, true);
String et = formatPullTime(endDate, false);
//构造rtsp回放流地址 username password ip port
String rtsp = String.format(
rtspReplayPattern,
username,
password,
ip,
port,
channel,
st,
et
);
if (grabber != null) {
grabber.stop();
}
grabber = createGrabber(rtsp);
grabber.setTimeout(10000);
grabber.start();
//心跳消失停止推流
while (!replayOverTime(userId)) {
Frame frame = grabber.grabImage();
if (null == frame) {
continue;
}
BufferedImage bufferedImage = java2DFrameConverter.getBufferedImage(frame);
byte[] bytes = imageToBytes(bufferedImage, "jpg");
ByteBuffer buffer = ByteBuffer.wrap(bytes);
//使用websocket发送图片数据
ReplayWebsocke.sendImage(buffer, userId);
}
}
} catch (Exception e){
e.printStackTrace();
} finally {
if (grabber != null) {
grabber.stop();
}
}
}
}
视频水印添加:
@Component
public class ImgMarker {
/**
* 视频水印图片
*/
BufferedImage logoImg;
private Font font;
private Font font2;
private FontDesignMetrics metrics;
private FontDesignMetrics metrics2;
@PostConstruct
private void init() {
// 加水印图片
try {
ImageIO.read(new File("图片地址"));
} catch (IOException e) {
e.printStackTrace();
}
font = new Font("黑体", Font.BOLD, 16);
font2 = new Font("黑体", Font.BOLD, 24);
metrics = FontDesignMetrics.getMetrics(font);
metrics2 = FontDesignMetrics.getMetrics(font2);
}
/**
* 加水印
* @param bufImg 视频帧
*/
public void mark(BufferedImage bufImg) {
if (bufImg == null || logoImg == null) {
return;
}
int width = bufImg.getWidth();
int height = bufImg.getHeight();
Graphics2D graphics = bufImg.createGraphics();
graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
//设置图片背景
graphics.drawImage(bufImg, 0, 0, width, height, null);
//添加右上角水印
graphics.drawImage(logoImg, width - 130, 8, 121, 64, null);
}
/**
*
* @param bufImg 视频帧
*/
public void markTag(BufferedImage bufImg, String msg, int videoWidth) {
int width = bufImg.getWidth();
int height = bufImg.getHeight();
Graphics2D graphics = bufImg.createGraphics();
graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
//设置图片背景
graphics.drawImage(bufImg, 0, 0, width, height, null);
//设置由上方标签号
graphics.setColor(Color.orange);
if (videoWidth <= 400) {
graphics.setFont(font2);
graphics.drawString(msg, width - metrics2.stringWidth(tagId) - 24, metrics2.getAscent());
} else {
graphics.setFont(font);
graphics.drawString(msg, width - metrics.stringWidth(msg) - 12, metrics.getAscent());
}
graphics.dispose();
}
}
至此可以调用了(还有其他方式是直接调用SDK和推送视频流媒体服务器,后续文章更新)
websocket 涉及到高并发阻塞情况 后续更新,建议使用netty