Couldn't initialize capture device on linux Ca

Question

I have installed j2sdk1.4.2-02 and jmf 2.1.1e on linux.When I started jmstuido ,jmstudio found "video capture device ":Name=v41:OV511+USC Camera:0
Locator = v41://0 and support Output Format :four kinds of YUVFormat .
audio capture device :Name=JavaSound audio capture
Locator = javasound://44100 and support Output Format :seven kinds of AudioFormat LINEAR.
But when I open file->capture ,video display OK and audio display error :"controller error ! failed to prefetch: cann't open audio device."
when I open file->transmit , I want to transmit video not audio and the monitor display OK but the other side cann't receive video.
I write some codes :
     DataSource dsvideo = null;
     Vector deviceList=null;
     CaptureDeviceInfo di = null;
     MediaLocator ml=null;
deviceList = CaptureDeviceManager.getDeviceList(new VideoFormat(null));
if (deviceList.size() > 0)
di = (CaptureDeviceInfo)deviceList.firstElement();
else
System.err.println("System has not video device!");
System.exit(-1);
ml=di.getLocator();
DataSource ds=null;
try
ds = Manager.createDataSource(ml);
catch(NoDataSourceException nodatasourceexception)
System.err.println("Cannot create DataSource from: " + ml);
System.exit(0);
catch(IOException ioexception)
System.err.println("Cannot create DataSource from: " + ml);
System.exit(0);
catch (Exception e)
System.err.println("Cannot create DataSource from: " + ml);
System.exit(0);
compiling is ok but when I run the program ,the system display:
java.io.IOException: java.lang.Error: Couldn't initialize capture device
Cannot create DataSource from: v4l://0 .
with the same condition and the same executing , I can be successful on windows2000.Why is not on linux?Please help me. thanks a lot!

Answer 1

I have installed j2sdk to /java/j2sdk and jmf to /java/jmf
I have added to /root/.bashrc including:
JAVA_HOME="/java/j2sdk"
PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin:/usr/games:/java/j2sdk/bin:/java/j2sdk/lib:/java/j2sdk/jre/bin:/java/j2sdk/jre/lib:/java/jmf/bin:/java/jmf/lib"
JMF_HOME="/java/jmf"
LD_LIBRARY_PATH="$JMF_HOME/lib:/java/j2sdk/jre/lib/i386:/java/j2sdk/jre/lib/i386/client"
LD_PRELOAD="/java/j2sdk/jre/lib/i386/libjawt.so"
CLASSPATH="$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JMF_HOME/lib/jmf.jar:.:$JMF_HOME/lib/mediaplayer.jar:$JMF_HOME/lib/multiplayer.jar"
[ "$UID" = "0" ] || PATH="$PATH:."
export PATH JAVA_HOME JMF_HOME CLASSPATH LD_LIBRARY_PATH LD_PRELOAD