如何使用 JMF 捕获视频，但不安装 JMF

我正在从事的一个视频会议项目使用JMF来捕获视频和音频，并将其传输到另一个端点。一个问题是，我的团队不希望产品用户必须安装 JMF。

我认为分享我们解决这个问题的方法可能是值得的。它的工作原理。它运行良好。我的问题是：有没有人有更好的方法来做到这一点？

环境：视窗、XP 及以上版本

1. 下载 JMF for Windows

2. 将其安装在您的计算机上

3. 安装 jmf 后，在 system32 文件夹中找到以下 s：dll

   jmacm.dll
   jmam.dll
   jmcvid.dll
   jmdaud.dll
   jmdaudc.dll
   jmddraw.dll
   jmfjawt.dll
   jmg723.dll
   jmgdi.dll
   jmgsm.dll
   jmh261.dll
   jmh263enc.dll
   jmjpeg.dll
   jmmci.dll
   jmmpa.dll
   jmmpegv.dll
   jmutil.dll
   jmvcm.dll
   jmvfw.dll
   jmvh263.dll
   jsound.dll

4. 将 s 复制到临时文件夹中dll

5. 找到文件（在计算机上搜索该文件）jmf.properties
6. 下载 JMF 源代码
   在源代码中，找到以下文件：

JMFinit.java
JMRPropertiesGen.java
Registry.java
RegistryGen.java

1. 创建包;我会叫它JMFNoInstall
2. 添加步骤 6 中列出的文件
3. 将一个名为 Main 的类添加到此包中，如下所示：

package JMFNoInstall;
// add your imports and whatnot here
public class Main()
{
    public Main()
    {
        JMFinit.main(null);
        JMFPropertiesGen.main(null);
        Registry.main(null);
        RegistryGen.main(new String[] {
            new File(".").getAbsolutePath(),
            "registrylib"
        });
    }
}

该文件需要与具有您的方法的类位于同一文件夹中，或者与包含该方法的 JAR 归档文件位于同一文件夹中。
s 需要进入文件夹。您可以让程序检查它们是否在文件夹中。如果不是，您可以让它从某个位置复制它们。每当上面列出的类运行时，该文件都会更新。您只需要运行一次，即程序首次运行时，或者用户是否要添加新的捕获设备。最后，只需确保 Windows JMF 下载附带的文件和该文件包含在类路径中即可。在这一点上，你很高兴。JMF 的所有功能，而无需实际安装它。jmf.propertiesmainmaindllwin32win32jmf.propertiesMainjmf.jarjmfcom.jar

实际上，这涉及的工作并不多，您可以轻松地将其合并到自定义安装程序中。

有没有人找到更好的方法来做到这一点？这样做有一些陷阱。

编辑：我认为分享我创建的一些代码可能是值得的。当然，您需要对其进行修改以处理您的操作。它可能不会编译，但缺少的东西应该很容易重新创建。但认为这可能是帮助人们的一个很好的起点。detectCaptureDevices功能可能会帮助大多数人。我一边走边更新这门课。

import GUI.Window;
import GlobalUtilities.OS;
import GlobalUtilities.ProgressBar;
import GlobalUtilities.FileUtilities;
import java.io.File;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.text.Utilities;


/**
 * This class providex easy access to the most needed info about JMF. You can test
 * a JMF install (Windows only currently) and also get info about the captrue
 * devices hooked up to JMF.
 * @author dvargo
 */
public class JMFRunner
{
    /**
     * Show the status of operations
     */
    final ProgressBar theBar = new ProgressBar();
    /**
     * Location where the dll's JMF relies on need to be placed
     */
    final String windowsDllFolder = "C:\\WINDOWS\\system32\\";

    final String linuxDllFolder = "/usr/lib/";

    /**
     * Dll's that JMF uses
     */
    final String[] windowsDllList = new String[]{
        "jmacm.dll",
        "jmam.dll",
        "jmcvid.dll",
        "jmdaud.dll",
        "jmdaudc.dll",
        "jmddraw.dll",
        "jmfjawt.dll",
        "jmg723.dll",
        "jmgdi.dll",
        "jmgsm.dll",
        "jmh261.dll",
        "jmh263enc.dll",
        "jmjpeg.dll",
        "jmmci.dll",
        "jmmpa.dll",
        "jmmpegv.dll",
        "jmutil.dll",
        "jmvcm.dll",
        "jmvfw.dll",
        "jmvh263.dll",
        "jsound.dll"};

    String[] linuxDllList = new String[]{
        "libjmcvid.so",
        "libjmdaud.so",
        "libjmfjawt.so",
        "libjmg723.so",
        "libjmgsm.so",
        "libjmh261.so",
        "libjmh263enc.so",
        "libjmjpeg.so",
        "libjmmpa.so",
        "libjmmpegv.so",
        "libjmmpx.so",
        "libjmutil.so",
        "libjmv4l.so",
        "libjmxlib.so"
    };

    String [] dlls= null;
    String dir = null;

    /**
     * List of the video capture devices found by JMF
     */
    Vector videoDevices = null;
    /**
     * List of the audio capture devices found by JMF
     */
    Vector audioDevices = null;

    public JMFRunner()
    {
        if(OS.isWindows())
        {
            dlls = windowsDllList;
            dir = windowsDllFolder;
        }
        else if(OS.isLinux())
        {
            dlls = linuxDllList;
            dir = linuxDllFolder;
        }
        else
        {
            Window.getLogger().severe("Operating system does not support JMF");
        }

    }

    /**
     * Adds new capture devices
     */
    public void detectCaptureDecives()
    {


        Thread theTread = new Thread(theBar);
        theTread.start();
        theBar.repaint();

        JMFInit.main(new String[] {""});
        JMFPropertiesGen.main(new String[] {""});
        Registry.main(new String[] {""});
        RegistryGen.main(new String[] {"-d",
            new File(".").getAbsolutePath(),
            "registrylib"
        });

        theBar.setMessage("");
        theBar.stop();
    }

    /**
     * Verifies that all the dll's that JMF needs are in their correct spot
     * @return True if all dlls are in their correct spot, false otherwise
     */
    public boolean detectDlls()
    {
        boolean retVal = true;
        String currFile;
        for(String currDll : dlls)
        {
            currFile = dir + currDll;
            if(! new File(currFile).exists())
            {
                Window.getLogger().severe("Can not find dll " + currFile + " for JMF");
                retVal = false;
            }
        }
        return retVal;
    }

    //Doesnt work quite yet
    public boolean installLibraryFiles()
    {
        boolean retVal = true;
        String currFile;
        for(String currDll : dlls)
        {
            currFile = dir + currDll;
            File newDll = new File(currFile);
            //see if this dll is already there
            if(!newDll.exists())
            {
                //its not there so lets copy it
                try
                {
                    FileUtilities.copy(newDll,FileUtilities.getResourceFile("/JMFManager/Resources/"+currDll,currDll));
                }
                catch(Exception e)
                {
                    retVal =  false;
                }
            }
        }
        return retVal;
    }

    /**
     * Returns the location of the jmf.properties file that STix is using
     * @return THe locaiton of the JMF properties
     */
    public String getJMFPropertiesFileLocation()
    {
        return Registry.getJMFPropertiesFileLocation();
    }

    /**
     * Returns a list of the audio devices found by JMF
     * @return Returns an Arraylist containing info about the audio capture devices
     */
    public ArrayList getAudioDevices()
    {
        DeviceFinder df = new DeviceFinder();
        audioDevices = df.getSoundCaptureDevices();
        return new ArrayList(audioDevices);
    }

    /**
     * Returns a list of the video decives deteced by JMF
     * @return returns an arraylist with info of the video capture devices
     */
    public ArrayList getVideoDevices()
    {
        DeviceFinder df = new DeviceFinder();
        videoDevices = df.getVideoCaptureDevices();
        return new ArrayList(videoDevices);
    }


    public static void main(String [] args)
    {
        JMFRunner x = new JMFRunner();
        //x.detectCaptureDecives();
        x.installLibraryFiles();
        System.out.println(x.detectDlls());
        System.out.println(x.getJMFPropertiesFileLocation());
        System.out.println(x.getAudioDevices());
        System.out.println(x.getVideoDevices());
    }
}

设备查找器.java

import java.util.Vector;
import javax.media.*;
import javax.media.format.*;

/**
 * this class gets information about capture devices (mics and cameras)
 */
public class DeviceFinder {

    Vector videoDevices = new Vector();
    Vector audioDevices = new Vector();

   /**
   * Constructor
   * Creates a new DeviceFinder
   */
   public DeviceFinder()
   {
      /*retrieve ALL video and audio devices*/
      videoDevices = CaptureDeviceManager.getDeviceList(new VideoFormat(null));
      audioDevices = CaptureDeviceManager.getDeviceList(new AudioFormat(null));
   }

   /**
   * purpose:  Get information on all Video capture devices on the system
   * @return java.util.Vector 
 a vector of attributes
   */
   public Vector getVideoCaptureDevices()
   {
      return  videoDevices;
   }


   /**
   * purpose:  Get information on all audio capture devices on the system
   * @return java.util.Vector 
 a vector of attributes
   */
   public Vector getSoundCaptureDevices()
   {
      return audioDevices;
   }


   /**
   * retrieve the first video capture device
   */
   public CaptureDeviceInfo getPrimaryVideoCaptureDevice()
   {
      return (CaptureDeviceInfo)videoDevices.get(0);
   }

   /*retrieve the first audio capture device*/
   public CaptureDeviceInfo getPrimaryAudioCaptureDevice()
   {
      return (CaptureDeviceInfo)audioDevices.get(0);
   }


   /**
   * get the first video device name
   * @return String 
 the name of the video device
   */
   public String getVideoCaptureDeviceName()
   {
      return ((CaptureDeviceInfo)videoDevices.get(0)).getName();
   }


   /**
   * get the first audio device name
   * @return String 
 the name of the audio device
   */
   public String getAudioCaptureDeviceName()
   {
      return ((CaptureDeviceInfo)audioDevices.get(0)).getName();
   }


   /**
   * get the first video device media locator
   * @return MediaLocator
   */
   public MediaLocator getVideoMediaLocator()
   {
      return ((CaptureDeviceInfo)videoDevices.get(0)).getLocator();
   }


   /**
   * get the first audio device media locator
   * @return MediaLocator
   */
   public MediaLocator getAudioMediaLocator()
   {
      return ((CaptureDeviceInfo)audioDevices.get(0)).getLocator();
   }


   /**
   * get the video device media locator at index idx
   * @param idx index of the media locator (0 is the first/default,
    * as ordered by
   * 
the JMFRegistry)
   * @return MediaLocator
   */
   public MediaLocator getVideoMediaLocator(int idx)
   {
      if(idx >= videoDevices.size())
      {
         return null;
      }
      return ((CaptureDeviceInfo)videoDevices.get(idx)).getLocator();
   }


   /**
   * get the audio device media locator at index idx
   * @param idx  index of the audio device (as ordered by the JMFRegistry)
   * @return MediaLocator
   */
   public MediaLocator getAudioMediaLocator(int idx)
   {
      return ((CaptureDeviceInfo)audioDevices.get(idx)).getLocator();
   }


   /**
   *
   * @param args
   */
   public static void main(String[] args)
   {
      DeviceFinder df = new DeviceFinder();
      //DEBUG:
      System.out.println(df.getVideoMediaLocator());
      System.out.println(df.getAudioMediaLocator());
   }
}