Xuggle和java库路径 [英] Xuggle and java library path
问题描述
我在用Java写一个screencast应用程序。
我决定使用Xuggle来做这件事，我按照xuggle wiki上的安装说明。
I'm writing a screencast application in Java. I decided to use Xuggle to do it and I followed up the installation instructions on the xuggle wiki.
我设置了PATH环境与％XUGGLE_HOME％ \\ bin和％XUGGLE_HOME％\ lib。一切似乎确定。
我将此应用程序作为RCP插件。我尝试在RCP邮件模板，插件是工作，视频生成正确。
I set up the PATH environment with %XUGGLE_HOME%\bin and %XUGGLE_HOME%\lib. Everything seems OK. I made this application as a RCP plugin. I tried it on the "RCP-mail" template and the plugin is working and the video is generated correctly.
但是当我决定使用它在一个真正的应用程序时，插件崩溃时出现了一个奇怪的错误消息：
But when I decided to use it on a "real" application, the plug-in crashed with a strange error message:
启动捕获
Starting Capture
2011-11-10 08：08：45,438 [Thread-5] WARN com.xuggle.ferry.JNILibraryLoader - 失败：库加载库：xuggle-xuggler;版本：3：绝对路径：C：\Program Files（x86）\Xuggle\bin\libxuggle-xuggler-3.dll;错误：java.lang.UnsatisfiedLinkError：C：\Program Files（x86）\Xuggle\bin\libxuggle-xuggler-3.dll：找不到依赖库
2011-11-10 08:08:45,438 [Thread-5] WARN com.xuggle.ferry.JNILibraryLoader - Failure: library load of library: xuggle-xuggler; version: 3: absolute path: C:\Program Files (x86)\Xuggle\bin\libxuggle-xuggler-3.dll; error: java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\Xuggle\bin\libxuggle-xuggler-3.dll: Can't find dependent libraries
2011-11-10 08：08：45,447 [Thread-5] WARN com.xuggle.ferry.JNILibraryLoader - 失败：库加载库：xuggle-xuggler;版本：3：绝对路径：C：\Program Files（x86）\Xuggle\bin\libxuggle-xuggler-3.dll;错误：java.lang.UnsatisfiedLinkError：C：\Program Files（x86）\Xuggle\bin\libxuggle-xuggler-3.dll：找不到依赖库
2011-11-10 08:08:45,447 [Thread-5] WARN com.xuggle.ferry.JNILibraryLoader - Failure: library load of library: xuggle-xuggler; version: 3: absolute path: C:\Program Files (x86)\Xuggle\bin\libxuggle-xuggler-3.dll; error: java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\Xuggle\bin\libxuggle-xuggler-3.dll: Can't find dependent libraries
2011-11-10 08：08：45,453 [Thread-5]错误com.xuggle.ferry.JNILibraryLoader - 无法加载库：xuggle-xuggler;版本：3;访问 http://www.xuggle.com/xuggler/faq/ 查找常见解决方案这个问题
2011-11-10 08:08:45,453 [Thread-5] ERROR com.xuggle.ferry.JNILibraryLoader - Could not load library: xuggle-xuggler; version: 3; Visit http://www.xuggle.com/xuggler/faq/ to find common solutions to this problem
但是这很奇怪，因为java.library.path是很好定义的：
But this strange because the java.library.path is well defined:
logger.info(System.getProperty("java.library.path"));
返回
Nov 10, 2011 8:08:45 AM com.gvs.tools.ui.record.video.handler.RecordHandler startRecording
INFO: C:\Program Files (x86)\Java\jre6\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files (x86)/Java/jre6/bin/client;C:/Program Files (x86)/Java/jre6/bin;C:/Program Files (x86)/Java/jre6/lib/i386;C:\Program Files (x86)\Xuggle\bin;C:\Program Files (x86)\Xuggle\lib;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\JProbe 8.3\bin;C:\Program Files\TortoiseSVN\bin;D:\Work\Paul\eclipse;;.
我缺少什么使插件与此应用程序一起工作？
这是由于应用程序使用其他本机库（如3D-dll）的问题吗？
What I'm missing to make the plug-in work with this application? Is this issue due to the fact that the application uses other native libraries such as 3D-dll?
这是用于制作screencast视频的代码：
Here is the code used to make the screencast video:
RecordHandler.java:
private void startRecording() {
Logger logger = Logger.getLogger(RecordHandler.class.getName());
logger.info(System.getProperty("java.library.path"));
// Initialize framesQueue
framesQueue = new LinkedBlockingQueue<BufferedImage>();
// Initialize the capture thread
captureThread = new ScreenCapturer();
captureThread.setCaptureFramesQueue(framesQueue);
// Initialize the recorder
encoderThread = new FrameEncoder("test.mp4");
encoderThread.setCapturedFramesQueue(framesQueue);
// Start capture
captureThread.start();
// wait for the Queue to be feed before encoding
try {
Thread.sleep(1000L);
} catch (InterruptedException e) {
}
encoderThread.start();
}
ScreenCapturer.java：
ScreenCapturer.java:
@Override
public void run() {
// Retrieve the application main window's shell
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
appShell = Display.getCurrent().getActiveShell();
}
});
isRunning = true;
System.out.println("Starting Capture");
for (numberOfFramesTaken = 0; isRunning && numberOfFramesTaken <= IVideoEncoderConfiguration.MAXIMUM_NUMBER_OF_FRAMES; numberOfFramesTaken++) {
try {
takeScreenShot();
Thread.sleep(IVideoEncoderConfiguration.CAPTURE_TIME_INTERVAL_MILLIS);
} catch (InterruptedException e) {
}
}
System.out.println("Capture has ended");
System.out.println("Number of frames taken: "
+ numberOfFramesTaken);
}
/**
* Take a screen capture and store it in the capturedFramesQueue
*/
private void takeScreenShot() {
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
if (appShell != null) {
Rectangle bounds = appShell.getBounds();
java.awt.Rectangle awtBounds = new java.awt.Rectangle(bounds.x, bounds.y, bounds.width, bounds.height);
final BufferedImage screenCapture = robot.createScreenCapture(awtBounds);
try {
capturedFramesQueue.put(screenCapture);
} catch (InterruptedException e) {
}
}
}
});
}
FrameEncoder.java：
FrameEncoder.java:
public void run() {
isRunning = true;
String outFile = outputdirectoryPath + outputFileName;
// First, let's make a IMediaWriter to write the file.
final IMediaWriter writer = ToolFactory.makeWriter(outFile);
// Retrieve the first frame to guess video dimensions
BufferedImage firstFrame = null;
try {
firstFrame = capturedFramesQueue.take();
} catch (InterruptedException e) {
}
if (firstFrame == null) {
return;
}
// We tell it we're going to add one video stream, with id 0,
// at position 0, and that it will have a fixed frame rate of
// FRAME_RATE.
writer.addVideoStream(0, 0,
IVideoEncoderConfiguration.FRAME_RATE,
firstFrame.getWidth(), firstFrame.getHeight());
long startTime = System.nanoTime();
for (numberOfFramesRecorded = 0; isRunning
&& numberOfFramesRecorded <= IVideoEncoderConfiguration.MAXIMUM_NUMBER_OF_FRAMES; numberOfFramesRecorded++) {
// Retrieve the captured frame
try {
final BufferedImage currentFrame = convertToType(capturedFramesQueue.take(), BufferedImage.TYPE_3BYTE_BGR);
// encode the next frame
writer.encodeVideo(0, currentFrame, System.nanoTime() - startTime,
TimeUnit.NANOSECONDS);
// sleep, time depending of FRAME_RATE
Thread.sleep(IVideoEncoderConfiguration.CAPTURE_TIME_INTERVAL_MILLIS);
} catch (InterruptedException e) {
}
}
// Get the remaining frame on the queue
Collection<BufferedImage> frames = new LinkedList<BufferedImage>();
capturedFramesQueue.drainTo(frames, IVideoEncoderConfiguration.MAXIMUM_NUMBER_OF_FRAMES - numberOfFramesRecorded);
for (BufferedImage frame : frames) {
BufferedImage currentFrame = convertToType(frame, BufferedImage.TYPE_3BYTE_BGR);
writer.encodeVideo(0, currentFrame, System.nanoTime() - startTime,
TimeUnit.NANOSECONDS);
}
// close the MediaWriter, write the trailer if needed
writer.close();
}
推荐答案
，但问题是Xuggler要求所有的DLL都在操作系统的load-path环境中，而不仅仅是java.library.path
It's a little late I know, but the problem is that Xuggler requires ALL THE DLLs to be in the operating system load-path environment, not just the java.library.path
这意味着所有的DLL与Xuggle安装（例如，libavcodec.dll）需要在启动Java的进程的％PATH％环境变量中。
That means that all DLLs that install with Xuggle (for example, libavcodec.dll) need to be in the %PATH% environment variable of the process that launched Java.
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