This probleam only happened on Nokia 308 & Nokia 311;
the video has shown but no voice,but I used browser to player the rtsp video is ok~
Fllowing is the implement code,my e-mail:cmmx207@163.com

public synchronized void initPlayer() {

try {
if (player == null) {
//url like "rtsp://211.136.119.78/test/38hua.3gp"
player = Manager.createPlayer(url);
}
if (player != null) {
player.addPlayerListener(this);
player.realize();
Control[] controls = player.getControls();
for (int i = 0; i < controls.length; i++) {
if (controls[i] instanceof VideoControl) {
videoC = (VideoControl) controls[i];
videoC.initDisplayMode(VideoControl.USE_DIRECT_VIDEO,
Display.getInstance().getCanvasImpl());
videoC.setDisplayLocation(videoX, videoY);
videoC.setDisplaySize(videoW, videoH);
videoC.setVisible(false);
}
if (controls[i] instanceof VolumeControl) {
volumeC = (VolumeControl) controls[i];
volumeLevel = volumeC.getLevel();
Util.writeLog("volumeLevel == "+volumeLevel, ""); //value is 55 but there's no voice
}
}
player.prefetch();
in_Player_State = PLAYER_STATE_DEVICE_PREPARE;
player.start();

setVisable(true);
in_Player_State = PLAYER_STATE_DEVICE_STARTED;
videoForm.showBufferLabel(Consts.FREEFEES,"initPlayer");
}
} catch (Exception e) {
closePlayer();
playerUpdate(null, PLAYEREXCEPTION, null);
}
}