play m4v and m4a in blackberry

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Java

Mobile

Blackberry

I used a code to play a song in blackberry.

public VideoPlaybackDemoScreen() {
		
		Class cl = null;
		
		try {
			cl = Class.forName("mypackage.VideoPlaybackDemoScreen");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		if (cl != null) {
			try {
				InputStream is = getClass().getResourceAsStream(
						"/mzm.yzzwpvvt..640x348.h264lc.u.p.m4v");
				final Player player = javax.microedition.media.Manager
						.createPlayer(is, "video/m4v");
				player.realize();

				VideoControl videoControl = (VideoControl) player
						.getControl("VideoControl");
				Field videoField = (Field) videoControl.initDisplayMode(
						VideoControl.USE_GUI_PRIMITIVE,
						"net.rim.device.api.ui.Field");
				videoControl.setDisplaySize(480, 256);
				videoControl.setVisible(true);

				add(new LabelField("Top", 0));
				add(videoField);
				add(new LabelField("Bottom", 0));
				final int i = 30;

				final VolumeControl volume = (VolumeControl) player
						.getControl("VolumeControl");
				ButtonField volumeIncrease = new ButtonField("Volume Increase") {
					protected boolean navigationClick(int status, int time) {
						VolumeControl volC = (VolumeControl) player
								.getControl("VolumeControl");
						int volume = volC.getLevel() + 10;
						volC.setLevel(volume);
						Dialog.alert(String.valueOf(volume));
						return true;
					}
				};
				ButtonField volumeDecrease = new ButtonField("Volume Decrese") {
					protected boolean navigationClick(int status, int time) {
						VolumeControl volC = (VolumeControl) player
								.getControl("VolumeControl");
						int volume = volC.getLevel() - 10;
						volC.setLevel(volume);
						return true;
					}
				};
				add(volumeIncrease);
				add(volumeDecrease);
				player.start();

			} catch (IOException e) {
				Dialog.alert(e.getMessage());
			} catch (MediaException e) {
				Dialog.alert(e.getMessage());
			}

		}
	}

I used above code to play .m4a and .m4a songs. But when try to play .m4v songs, it gives an error message like "format is not supporting". If anybody knows how to play .m4v and .m4a songs in blackberry plaese let me know. thanks.