【发布时间】：2010-10-28 19:48:10
【问题描述】：
我正在处理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：有人有更好的方法吗？
环境：Windows、XP及以上
- 下载适用于 Windows 的 JMF
在你的机器上安装它
-
jmf安装后在system32文件夹中找到如下
dlls：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
dlls 复制到临时文件夹中- 找到
jmf.properties文件（在您的计算机上搜索） - 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
- 创建一个包；我会叫它
JMFNoInstall - 添加步骤 6 中列出的文件
- 在这个包中添加一个名为 Main 的类：
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 文件需要与具有 main 方法的类位于同一文件夹中，或者与包含 main 方法的 JAR 存档位于同一文件夹中。dlls 需要进入 win32 文件夹。您可以让您的程序检查它们是否在win32 文件夹中。如果不是，您可以让它从某个位置复制它们。只要上面列出的Main 类运行，jmf.properties 文件就会更新。您只需要运行一次，第一次运行程序，或者如果用户想添加新的捕获设备。最后，只需确保 Windows JMF 下载附带的 jmf.jar 文件和 jmfcom.jar 包含在类路径中。你现在可以走了。无需实际安装即可使用 JMF 的所有功能。
这确实涉及的工作并不多，您可以很容易地将其合并到您的自定义安装程序中。
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事情。它可能无法编译，但是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 函数可能对大多数人都有帮助。我会随时更新这门课。
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());
}
}
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());
}
}
【问题讨论】：
-
在此示例/示例代码和一些步骤上分享更多信息会是一个更好的主意，我也在尝试类似的方法。并且正在考虑转向 JMF 或本地访问？
-
@Stackfan 如果对任何人有帮助，我已经添加了一些代码
-
@user489041 你说“dll需要进入win32文件夹”你的意思是
system32？ -
@MikeNereson 是的，对不起。我的意思是 system32 文件夹。我真的需要更新这篇文章。我已经大大简化了这个过程。
-
@user489041 更新它！那简直太好了。我跟着做，但在提取 DLL 后链接到 DLL 时出现错误。我在运行它的计算机上得到这个。你有什么见解吗？ pastie.org/private/ug8gdu8ohj3fxpasgumpw -- 我可以搁置这个项目，但 8 周后我又回来了。
标签： java distribution jmf java-native-library