Capturing image from stream of usb video camera
I am trying to create a web application in which i want to show stream of video on a page and capture image when i click a button.
I was trying to find a list of devices connected to my pc using the code with jmf
Code:
public class GetDeviceList
{
private static boolean debugDeviceList = false;
private static String defaultVideoDeviceName = "Logitech USB Video Camera";
private static String defaultAudioDeviceName = "DirectSoundCapture";
private static String defaultVideoFormatString = "size=176x144, encoding=yuv, maxdatalength=38016";
private static String defaultAudioFormatString = "linear, 16000.0 hz, 8-bit, mono, unsigned";
private static CaptureDeviceInfo captureVideoDevice = null;
private static CaptureDeviceInfo captureAudioDevice = null;
private static VideoFormat captureVideoFormat = null;
private static AudioFormat captureAudioFormat = null;
public static void device list()
{
java.util.Vector deviceListVector = CaptureDeviceManager.getDeviceList(null);
if (deviceListVector == null)
{
System.out.println("... error: media device list vector is null, program aborted");
System.exit(0);
}
if (deviceListVector.size() == 0)
{
System.out.println("... error: media device list vector size is 0, program aborted");
System.exit(0);
}
for (int x = 0; x < deviceListVector.size(); x++)
{
// display device name
CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) deviceListVector.elementAt(x);
String deviceInfoText = deviceInfo.getName();
if (debugDeviceList)
System.out.println("device " + x + ": " + deviceInfoText);
// display device formats
Format deviceFormat[] = deviceInfo.getFormats();
for (int y = 0; y < deviceFormat.length; y++)
{
// serach for default video device
if (captureVideoDevice == null)
if (deviceFormat[y] instanceof VideoFormat)
if (deviceInfo.getName().indexOf(defaultVideoDeviceName) >= 0)
{
captureVideoDevice = deviceInfo;
System.out.println(">>> capture video device = " + deviceInfo.getName());
}
// search for default video format
if (captureVideoDevice == deviceInfo)
if (captureVideoFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultVideoFormatString) >= 0)
{
captureVideoFormat = (VideoFormat) deviceFormat[y];
System.out.println(">>> capture video format = " + DeviceInfo.formatToString(deviceFormat[y]));
}
// serach for default audio device
if (captureAudioDevice == null)
if (deviceFormat[y] instanceof AudioFormat)
if (deviceInfo.getName().indexOf(defaultAudioDeviceName) >= 0)
{
captureAudioDevice = deviceInfo;
System.out.println(">>> capture audio device = " + deviceInfo.getName());
}
// search for default audio format
if (captureAudioDevice == deviceInfo)
if (captureAudioFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultAudioFormatString) >= 0)
{
captureAudioFormat = (AudioFormat) deviceFormat[y];
System.out.println(">>> capture audio format = " + DeviceInfo.formatToString(deviceFormat[y]));
}
}
}
System.out.println("... list completed.");
}
}
This displays the audio devices but no video device is being displayed event hough i have installed the drivers anf the jar files from jmf framework....
Can anyone help ..
