我正在研究的视频会议项目使用JMF来捕获视频和音频，并将其传输到另一个端点。问题是我的团队不希望产品的用户必须安装JMF。
我认为分享我们对这个问题的解决方案可能是值得的。有用。它运作良好。我的问题是：有没有人有更好的方法去做？
环境：Windows，XP及以上
将其安装在您的计算机上
在jmf安装后，在system32文件夹中找到以下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
将dll复制到临时文件夹
jmf.properties文件（在您的计算机上搜索） JMFinit.java
JMRPropertiesGen.java
Registry.java
RegistryGen.java
JMFNoInstall
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"
});
}
}
jmf.properties文件需要与包含main方法的类相同的文件夹或与包含main方法的JAR存档相同的文件夹。
dll需要进入win32文件夹。您可以让程序检查它们是否在win32文件夹中。如果不是，您可以将它从某个位置复制过来。只要上面列出的jmf.properties类运行，Main文件就会更新。您只需要运行一次，第一次运行程序，或者用户是否想要添加新的捕获设备。最后，请确保类似路径中包含随Windows JMF下载的jmf.jar文件和jmfcom.jar。你很高兴在这一点上去。 JMF的所有功能，而无需实际安装它。
这方面确实没有太多工作，您可以很容易地将它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。当然你需要修改它来处理你的问题。它不会编译，但缺少的东西应该很容易重新创建。但是认为这可能是帮助人们的良好起点。 detectCaptureDevices函数可能会帮助大多数人。我去的时候会更新这门课程。
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());
}
}
DeviceFinder.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());
}
}
答案 0 :(得分：4)
我认为没有更好的方法。除非通过路径名显式加载DLL，否则您只需要确保它们位于系统路径中，因此如果它们位于JVM可执行文件旁边，它也应该可以工作。 Windows会隐式包含程序从系统路径中启动的目录，因此这是另一个可能的位置。
安装程序是一把双刃剑，它们可以轻松添加新功能并在以后删除它，但它们也使得部署使用该产品的解决方案变得更加困难。
一般来说，Java的一个好处就是你不必安装它就可以了。基本上，一旦您在一个系统上执行JRE的安装，您就可以将其捆绑起来并在另一个系统上作为zip文件使用它。 Java不需要显式注册DLL，因为它会根据需要动态加载它们。