Video recording in java using java media framework is throwing exception

Question

For capture the live video from web using java and jmf i have written the below code , I plugin the usb webcam and i have installed java mediaframewrok latest and updated version.when i complie the program there is no error but while i run the program i got some error like this....

    Exception in thread "VFW Request Thread" java.lang.UnsatisfiedLinkError: JMFSecurityManager: java.lang.UnsatisfiedLinkError: no jmvfw in java.library.path at com.sun.media.JMFSecurityManager.loadLibrary(JMFSecurityManager.java:
206)
        at com.sun.media.protocol.vfw.VFWCapture.<clinit>(VFWCapture.java:19)
        at com.sun.media.protocol.vfw.VFWSourceStream.doConnect(VFWSourceStream.
java:241)
        at com.sun.media.protocol.vfw.VFWSourceStream.run(VFWSourceStream.java:7
63)
        at java.lang.Thread.run(Thread.java:724)

Answer 1

You should load the library like this (and can check the library path if it has been loaded.):

   public class Test {

      static {
        try {
            System.load("C:/PATH_TO/jmvfw.dll");
            System.out.println(String.format("%s has been successfully loaded","jmvfw"));
        } catch (UnsatisfiedLinkError e) {
          System.err.println("Native code library jmvfw  failed to load." , e);
          System.exit(1);
        }
      }
      //check if the lib is in java.library.path
      public static void main(String argv[]) {
        String libs = System.getProperty("java.library.path");
        for (String lib : libs.split(";")) 
            System.out.println(lib);

      }
    }

Update

The error:

C:\jmvfw.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform

means that your DLL is 32-bit. You have to recompile (or download) the DLL for 64-bit. Another option is to switch to a 32-bit JVM -- or get some 32-bit process to load the DLL on your behalf and communicate with that process (a bit complicated).