Embedding video in an application

[mangrar]

Hi, I'm trying to embed a video in a J2ME application. I'm doing test with SUN's sample video for mobile test-mpeg.mpg. I've been testing playing in my N80, in SUN's emulator and Nokia emulator and doesn't work. Here is some code from my MIDLet:

videoPlayer = Manager.createPlayer( getClass().getResourceAsStream("/com/mypackage/media/testmpeg.3gp"),
"video/3gpp" );

videoPlayer.addPlayerListener(this);

videoPlayer.realize();

VideoControl vc = (VideoControl) getVideoPlayer().getControl("VideoControl");

Display.getDisplay(this).setCurrent( getVideoCanvas() );

//Get a GUI to display the video
Item videoItem = (Item) vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, getVideoCanvas());

videoPlayer.start();

Where, getVideoCanvas() return a Canvas. I've test with mpeg, 3gp and mp4 and doesn't work in any case. Am I doing something wrong?

[jappit]

Is the path "/com/mypackage/media/testmpeg.3gp" correct? Also, which Exception (if any) does you code throw?

Pit

[mangrar]

This is the error log in Eclipse:

MIDlet: HomeMidlet
JVMJNCK038E JNI error in FromReflectedMethod: Argument #2 (0x3C61EDFC) is not a valid object reference. It's type is: unknown

JVMJNCK080E Error detected in the outermost frame of an attached thread

JVMJNCK023E JNI error detected. Continuing...

And this is the complete source code:

public void playVideo() {
try{
getVideoPlayer().realize();

VideoControl vc = (VideoControl) getVideoPlayer().getControl("VideoControl");

switchDisplayable(null, getVideoCanvas());

//Get a GUI to display the video
Item videoItem = (Item) vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, getVideoCanvas());

videoPlayer.start();
}catch(Exception e){
Alert alert = new Alert("ERROR");

if(e.getClass() == MediaException.class)
alert.setString("No se puede reproducir el vídeo.");

if(e.getClass() == NullPointerException.class)
alert.setString("No se pudo cargar el video");

e.printStackTrace();

switchDisplayable(alert, getSelectionScreenFrm());
}
}

public Player getVideoPlayer() {
if(videoPlayer==null){
try{
videoPlayer = Manager.createPlayer( getClass().getResourceAsStream(VIDEO_LOCATION),VIDEO_TYPE );
videoPlayer.addPlayerListener(this);
}catch(Exception e){
Alert alert = new Alert("ERROR");

if(e.getClass() == IOException.class)
alert.setString("No se ha encontrado el video.");

if(e.getClass() == MediaException.class)
alert.setString("No se puede reproducir el video.");

e.printStackTrace();

}
}
return videoPlayer;
}

public void switchDisplayable(Alert alert, Displayable nextDisplayable) {
Display display = getDisplay();
if (alert == null) {
display.setCurrent(nextDisplayable);
} else {
display.setCurrent(alert, nextDisplayable);
}
}

I've tried playing mpeg, 3gp and mp4 and no one works in the emulator neither in my nokia N80 device. Maybe the bug is in the Canvas implementation? This is my canvas:

public class VideoCanvas extends Canvas implements CommandListener {
/**
* constructor
*/
public VideoCanvas() {
try {
// Set up this canvas to listen to command events
setCommandListener(this);
// Add the Exit command
addCommand(new Command("Exit", Command.EXIT, 1));
} catch(Exception e) {
e.printStackTrace();
}
}

/**
* paint
*/
public void paint(Graphics g) {
}

/**
* Called when a key is pressed.
*/
protected void keyPressed(int keyCode) {
}

/**
* Called when a key is released.
*/
protected void keyReleased(int keyCode) {
}

/**
* Called when a key is repeated (held down).
*/
protected void keyRepeated(int keyCode) {
}

/**
* Called when the pointer is dragged.
*/
protected void pointerDragged(int x, int y) {
}

/**
* Called when the pointer is pressed.
*/
protected void pointerPressed(int x, int y) {
}

/**
* Called when the pointer is released.
*/
protected void pointerReleased(int x, int y) {
}

/**
* Called when action should be handled
*/
public void commandAction(Command command, Displayable displayable) {
}

}

[hartti]

As jappit suggested, make sure that the file is located in that directory inside the JAR file (you can open the JAR file with WinZip for example to see the folder structure inside the archive)

Hartti

[mangrar]

I've discovered the error, I had a line g.drawstring in the paint method. Now my Canvas class looks like this my canvas code:

public class VideoCanvas extends Canvas {
/**
* constructor
*/
public VideoCanvas() {
super();
}

/**
* paint
*/
public void paint(Graphics g) {
g.setColor(0x00000000); // black
g.fillRect(0, 0, getWidth(), getHeight());
}
}

Now the video file is being played in the Nokia's emulator but I get this error in eclipse's console view:

JVMJNCK038E JNI error in FromReflectedMethod: Argument #2 (0x3C61EDFC) is not a valid object reference. It's type is: unknown

JVMJNCK080E Error detected in the outermost frame of an attached thread

JVMJNCK023E JNI error detected. Continuing...


But the video is being played. In the device is not working, the video file isn't loaded.