我正在尝试使用 jxcapture 捕获视频.我设法只这样做了一次，但是当我试图在同一个程序中第二次捕获视频时，我遇到了麻烦。我的代码如下:

public VideoCapture videoCapture = VideoCapture.create(VideoFormat.WMV);
public CaptureVideoFromWebCamera(){}

public void start(String filename){


    List<VideoSource> availableVideoSources = VideoSource.getAvailable();
    System.out.println("availableVideoSources = " + availableVideoSources);

    if (availableVideoSources.isEmpty()) {
        throw new IllegalStateException("No external video sources available");
    }
    VideoSource webCamera = availableVideoSources.get(0);
    System.out.println("webCamera = " + webCamera);

    videoCapture.setVideoSource(webCamera);

    java.util.List<Codec> videoCodecs = videoCapture.getVideoCodecs();
    System.out.println("videoCodecs = " + videoCodecs);
    if (videoCodecs.isEmpty()) {
        throw new IllegalStateException("No video codecs available");
    }

    Codec videoCodec = videoCodecs.get(2);
    System.out.println("videoCodec = " + videoCodec);

    EncodingParameters encodingParameters = new EncodingParameters(new File("WebCamera.wmv"));
    encodingParameters.setBitrate(500000);
    encodingParameters.setFramerate(10);
    encodingParameters.setKeyFrameInterval(1);
    encodingParameters.setCodec(videoCodec);

    videoCapture.setEncodingParameters(encodingParameters);
    videoCapture.start();
    System.out.println("Recording started. Press 'Enter' to terminate.");

}

public void stop(String filename) throws IOException{
 System.in.read();
 videoCapture.stop();
}


public static void main(String[] args) throws Throwable {

    CaptureVideoFromWebCamera obj = new CaptureVideoFromWebCamera();
    obj.start("");
    obj.stop("");

    CaptureVideoFromWebCamera obj1 = new CaptureVideoFromWebCamera();       
    obj1.start("");
    obj1.stop("");

}

当我尝试这样做时，我收到以下错误(系统资源不足，无法完成请求的网络摄像头服务):

Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.teamdev.jxcapture.video.win.BaseDirectShowCapture.doStart(SourceFile:103) at com.teamdev.jxcapture.VideoCapture.start(SourceFile:146) at capturer.CaptureVideoFromWebCamera.start(CaptureVideoFromWebCamera.java:58) at capturer.CaptureVideoFromWebCamera.main(CaptureVideoFromWebCamera.java:76) Caused by: java.lang.reflect.InvocationTargetException at com.teamdev.jxdesktop.win32.g.doInvokeAndWait(Unknown Source) at com.teamdev.jxcapture.video.win.BaseDirectShowCapture.doStart(SourceFile:97) ... 3 more Caused by: com.teamdev.jxdesktop.win32.com.ComException: COM object method returns error code: 0x800705AA; Insufficient system resources exist to complete the requested service.

EDIT2:我尝试在代码中添加一些线程 hibernate 以等待第二个捕获过程。

CaptureVideoFromWebCamera obj = new CaptureVideoFromWebCamera();
    obj.start("1.wmv");
    obj.stop("");
    Thread.sleep(5000);
    CaptureVideoFromWebCamera obj1 = new CaptureVideoFromWebCamera();       
    obj1.start("2.wmv");
    obj1.stop("");

我遇到了同样的错误。

EDIT3:当我尝试使用相同的对象进行捕获时，我收到以下消息:

Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.teamdev.jxcapture.video.win.BaseDirectShowCapture.doStart(SourceFile:103) at com.teamdev.jxcapture.VideoCapture.start(SourceFile:146) at CaptureVideoFromWebCamera.start(CaptureVideoFromWebCamera.java:47) //videoCapture.start(); at CaptureVideoFromWebCamera.main(CaptureVideoFromWebCamera.java:64) /obj.start("2.wmv"); Caused by: java.lang.reflect.InvocationTargetException at com.teamdev.jxdesktop.win32.g.doInvokeAndWait(Unknown Source) at com.teamdev.jxcapture.video.win.BaseDirectShowCapture.doStart(SourceFile:97) ... 3 more

最佳答案

实际上，您收到错误消息是因为您的资源已被另一个线程锁定，并且当您尝试从另一个线程使用相同的资源时锁没有被释放。

在这里，你必须做两件主要的事情:

第一步: 在您的程序中，您设置了 Thread.Sleep(5000); 但它实际上暂停了您的线程，并且您没有设置任何语句来释放资源。因此，尝试在 finally 语句中重置相机套接字并关闭对象。

第 2 步: 尝试使用 Synchronizedthread 而不是使用普通线程，因为一次只有一个进程可以使用您的资源。

关于java - 系统资源不足，从网络摄像头java捕获视频，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38404268/