Recording audio in loop, crashes on N70

[hsundt]

Hi,
we're having some problems with audio recording on the Nokia N70. The program is supposed to create a player, record 1 second of audio, close the player, and then do this in a loop many times. After each recording, some analysis is supposed to be done.

The problem is that the program crashes after about 1 hour, with NullpointerException, or just exits. All code related to analysis etc has been taken out to be sure that the problem isn't related to that.

.....before loop......:
Player p;
RecordControl rc;
ByteArrayOutputStream output = new ByteArrayOutputStream();


.....code inside loop.....:

    p=Manager.createPlayer("capture://audio?encoding=pcm&bits=8&rate=8000");
    p.realize();
    rc = (RecordControl)p.getControl("RecordControl");
    output.reset();
    p.start();
          
    rc.setRecordStream(output);
    rc.startRecord();
    Thread.currentThread().sleep(1000);
    rc.commit();
    p.stop();
    p.close();
 
   // now analyze the recorded 1 second of audio
   // ....

The code above is very standard, so the probelm seem to arise when doing a huge number of recordings. Is there anything we can do to get it to work ? Or any other way we can record and analyze at the same time ?

We have also tried with just commit()'ing and restarting the recording, without re-initializing the player every time, but it didn't work either.
We have also tried different variants with starting the player after starting the recorder etc, but anyway it crashes in the end.

Greetings,
Henrik Sundt

[peterblazejewicz]

hi Henrik,

are you using try/catch? or even simply if(... == null){}
it could be that for example applciation cannot acquire control thus null pointer exception is thrown if:

rc = (RecordControl)p.getControl("RecordControl");
if(rc == null){
// trhow custom exception here or handle 
}

regards,
Peter

[tonyrebby]

I have the same problem with the 5800 XpressMusic.
tony

[MatthiasStevens]

*Bump*

Many other people have reported this problem on different handsets:
http://discussion.forum.nokia.com/fo...r-7-20-minutes
http://discussion.forum.nokia.com/fo...-on-nokia-6630
http://discussion.forum.nokia.com/fo...e-crashes-6600

I've seen the problem on the N95_8GB and the 5230.

I'm wondering if anyone would be will to help me test if the problem is still present on handsets with Symbian^3 and/or Nokia Java Runtime v2.1.
Anyone?