jmf获取摄像头

首先安装jmf,安装过程中会提示注册摄像头.

开始代码

用applet比较快

package com.cayden.video;

import java.awt.BorderLayout;
import java.awt.Choice;
import java.awt.Component;
import java.util.Vector;

import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Format;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.Player;
import javax.media.format.VideoFormat;
import javax.swing.JApplet;
import javax.swing.JPanel;

public class VApplet extends JApplet {

	private JPanel jContentPane = null; 
	 
	private Choice choice = null;
	 
	public VApplet() {
		super();
	}
	 
	public void init() {
		this.setSize(640, 480); 
		this.setContentPane(getJContentPane());
		this.setName("VApplet"); 
	}
	// 取系统所有可采集的硬件设备列表
	private CaptureDeviceInfo[] getDevices() {
		
		Vector devices = CaptureDeviceManager.getDeviceList(null);
	
		CaptureDeviceInfo[] info = new CaptureDeviceInfo[devices.size()];
		for (int i = 0; i < devices.size(); i++) {
			info[i] = (CaptureDeviceInfo) devices.get(i);
		}
		return info;
	}
	// 从已知设备中取所有视频设备的列表
	private CaptureDeviceInfo[] getVideoDevices() {
		
		CaptureDeviceInfo[] info = getDevices();
		
		System.out.println("设备数:"+info.length);
		
		CaptureDeviceInfo[] videoDevInfo;
		
		Vector vc = new Vector();
		
		for (int i = 0; i < info.length; i++) {
			
		// 取设备支持的格式，如果有一个是视频格式，则认为此设备为视频设备
		Format[] fmt = info[i].getFormats();
		
		System.out.println("fmt.length="+fmt.length);
		
			for (int j = 0; j < fmt.length; j++) {
				if (fmt[j] instanceof VideoFormat) {
					System.out.println("fmt[j] "+fmt[j]);
					vc.add(info[i]);
				}
				break;
			}
		}
	
		videoDevInfo = new CaptureDeviceInfo[vc.size()];
	
		for (int i = 0; i < vc.size(); i++) {
			videoDevInfo[i] = (CaptureDeviceInfo) vc.get(i);
		}
		
		System.out.println("videoDevInfo "+videoDevInfo.length);
		
		return videoDevInfo;
	} 

	private JPanel getJContentPane() {
	if (jContentPane == null) {
	BorderLayout borderLayout = new BorderLayout();
	jContentPane = new JPanel();
	jContentPane.setLayout(borderLayout);
	 
	MediaLocator ml = null;
	Player player = null;
	try {
	// 这里我只有一个视频设备，直接取第一个
	 // 取得当备的MediaLocator
	ml = getVideoDevices()[0].getLocator();
	// 用已经取得的MediaLocator得到一个Player
	player = Manager.createRealizedPlayer(ml); 
	player.start();
	// 取得Player的AWT Component 
	Component comp = player.getVisualComponent(); 
	// 如果是音频设备这个方法将返回null,这里要再判断一次
	if (comp != null) {
	// 将Component加到窗体 
	jContentPane.add(comp, BorderLayout.EAST); 
	}
	} catch (Exception e) {
	e.printStackTrace();
	}
	}
	return jContentPane;
	}
	}

运行效果如图所示.