Sound recording on emulator

[a.dionisi]

I receive always this exception: "javax.microedition.media.MediaException: Cannot create a DataSource for: capture://audio" while attempting to record a sound with SDK Emulator.
I don't understand why SDK emulator doesn't start audio recording. If you read on file Nokia_Prototype_SDK_UsersGuide.pdf at page 38, it says that audio recording is supported by emulator using a working microphone on PC.

[gordon32]

I meet the same problem,each time i want to record a audio,then there is a error says:"Player cannot be created for capture://audio
at javax.microedition.media.Manager.createPlayer(+191)"
I am confusing about it.if you have any method to work out,please tell me,tkz.

[balagopalks]

I have posted some code here for recording audio. Please go through this thread.
http://discussion.forum.nokia.com/fo...370#post288370

Regards
Gopal

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[gordon32]

Thank you for you help, I have tested the codes. When I use the SUN WTK, it can creat player to capture audio, but when I use sony ericsson emulator,there comes the error that I can't still capture the audio,I don't know why....

[khalandar]

Thank you for you help, I have tested the codes. When I use the SUN WTK, it can creat player to capture audio, but when I use sony ericsson emulator,there comes the error that I can't still capture the audio,I don't know why....

The problem with SonyEricsson Emulator is that sony Emulators dont support Audio Recording, only real phones do. You can see the reply from my thread given below from the Sony Development Team
http://developer.sonyericsson.com/th...8301&tstart=31

[gordon32]

Hi
When I change my emulator to SUN WTK, the audio is ok.Here is the codes,hoping it helpful for others....

package record.audio;

import javax.microedition.midlet.MIDlet;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import java.io.*;
import javax.microedition.io.file.*;
import javax.microedition.io.*;
public class RecordAudio extends MIDlet {
	Player player1, player2;
	ByteArrayOutputStream bos;
	ByteArrayInputStream bis;
	RecordControl rc;
	FileConnection fconn;
	DataOutputStream dos;
	DataInputStream dis;
	
	public RecordAudio() {
		
	}

	protected void destroyApp(boolean arg0)  {

	}

	protected void pauseApp() {

	}

	protected void startApp()  {
		try{
			
			try {
			     fconn = (FileConnection)Connector.open("file:///root1/newfile.wav");
			     // If no exception is thrown, then the URI is valid, but the file may or may not exist.
			     if (!fconn.exists())
			     {
			    	 fconn.create();  // create the file if it doesn't exist
			    	 System.out.println("FILE Exist");
			     }

			     //fconn.close();
			 }
			 catch (IOException ioe) {
				 ioe.printStackTrace();
			 }
			 
			 
			try{
				player1 = Manager.createPlayer("capture://audio");
			}catch(Exception e){
				System.out.println("creat error");
				e.printStackTrace();
			}
			System.out.println("After CREAT");
			player1.realize();
			
			try{
				rc = (RecordControl) player1.getControl("RecordControl");
			}catch(Exception e){
				System.out.println("RecordControl error");
				e.printStackTrace();
			}
			
			bos = new ByteArrayOutputStream();
			
			try{
				rc.setRecordStream(bos);
			}catch(Exception e){
				System.out.println("rc.setRecordStream(bos) error");
			}
			
	
			player1.prefetch();
			
			try {
				rc.startRecord();
			} catch (Exception e) {
				e.getMessage();
			}
			
			player1.start();
			Thread.sleep(10000);
			
			try {
				rc.commit();
			} catch (Exception e) {
				e.getMessage();
			}
			
			player1.close();
			System.out.println("After CLOSE");
			
			try{
				dos = fconn.openDataOutputStream();
				dos.write(bos.toByteArray());
				dos.flush();
				dos.close();
				fconn.close();
	    	}catch(Exception e){
				e.printStackTrace();
				System.out.println("dos error");
			}
			
			System.out.println("After Save Before Open");
			
	    	try{
	    		fconn = (FileConnection)Connector.open("file:///root1/newfile.wav");
	    		if(fconn.exists())
	    			System.out.println("Open");
	    		
	    		dis = fconn.openDataInputStream();
	    	}catch(Exception e){
	    		e.printStackTrace();
	    	}
	    	
	    	try{
	    		player2 = Manager.createPlayer(dis, "audio/x-wav");
	    	}catch(Exception e){
	    		e.printStackTrace();
	    	}
			
			System.out.println("After CREAT player2");
			try{
				player2.realize();
			}catch(Exception e){
				System.out.println("******");
				e.printStackTrace();
				e.getMessage();
				System.out.println("*******");
			}
			try{
				player2.prefetch();
				player2.start();
			}catch(Exception e){
				e.printStackTrace();
			}
			
			System.out.println("The end!!");
		}catch(Exception e){
			e.printStackTrace();
		}

	}

}