Video capturing issue - java-me

Question

I want to create a LWUIT Image from the captured video. The problem is that the MediaException is raised when calling getSnapshot() :
private void showCamera() // called when clicking the "open camera" command
{
try
{
Player mPlayer;
VideoControl mVideoControl;
mPlayer = Manager.createPlayer("capture://video");
mPlayer.realize();
mVideoControl = (VideoControl) mPlayer.getControl("VideoControl");
Canvas canvas = new CameraCanvas(this, mVideoControl, mPlayer, getFirstAvailableRoot(), "ADC"+adcId); // adcId is "1"
isFromPositionnement = true; // static variable
javax.microedition.lcdui.Display.getDisplay(controler).setCurrent(canvas);
mPlayer.start();
} catch (IOException ex) {
handleException();
} catch (MediaException ex) {
handleException();
}
}
private String getFirstAvailableRoot()
{
short iter;
String root = "Phone:/";
iter = 0;
Enumeration drives = FileSystemRegistry.listRoots();
while(drives.hasMoreElements() && iter < 1) {
root = String.valueOf(drives.nextElement());
iter++;
}
return root;
}
Code in "CameraCanvas" :
public class CameraCanvas extends Canvas implements CommandListener
{
...
public CameraCanvas(Ecran form, VideoControl videoControl, Player pPlayer, String pRoot, String dossierPhoto)
{
...
mCaptureCommand = new Command("Capturer", Command.SCREEN, 1);
addCommand(mCaptureCommand);
setCommandListener(this);
...
videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
try
{
videoControl.setDisplayLocation(2, 2);
videoControl.setDisplaySize(width - 4, height - 4);
}
catch (MediaException me)
{
try
{
videoControl.setDisplayFullScreen(true);
}
catch (MediaException me2)
{}
}
videoControl.setVisible(true);
}
private void capture() // called when clicking the mCaptureCommand command
{
try
{
isPhotoCaptured = true;
rawImg = vidCtrl.getSnapshot(null); // this throws the exception
vidCtrl.setVisible(false);
vidCtrl = null;
mPlayer.close();
mPlayer = null;
repaint();
}
catch (MediaException me)
{
isPhotoCaptured = false;
rawImg = null;
vidCtrl.setVisible(false);
vidCtrl = null;
mPlayer.close();
mPlayer = null;
handleException("capture ");
}
}
}
So what may be the cause of the issue ?

Answer 1

MMAPI has the ability to create an image and you can easily turn it to a LWUIT image (which has a create image that accepts an object). However, for some reason the "geniuses" who came up with this API made image capture a restricted API to protect your privacy. So effectively you can't invoke this API without an operator/manufacturer signature.