Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Why do I need a QTCanvas (JCanvas) for audio?

unless you want to display something you would not need to use a
QTCanvas, in case of an Audio file there is a better way of playing
sound without using QTCanvas.
you may find the code on developer site but here is it for you all :

public void playFile (String fileName) {
try {
String soundLocation = QTFactory.findAbsolutePath(
fileName ).getPath();

OpenMovieFile fileIn = OpenMovieFile.asRead (new
QTFile(soundLocation));
movie = Movie.fromFile (fileIn);
TaskAllMovies.addMovieAndStart();
movie.setActive(true);
movie.setRate(1);
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (QTException qte) {
qte.printStackTrace();
}
}
public void stop() {
movie.setRate(0);
movie.setActive(false);
TaskAllMovies.removeMovie();
}

static public void main (String[ ] args) {
try {
QTSession.open();
PlaySound theSoundPlayer = new PlaySound();
theSoundPlayer.playFile("sound.aiff");
}
catch (Exception e) {
e.printStackTrace();
QTSession.close();
}
}


this should do the trick
On Thursday, February 6, 2003, at 03:04 PM, Noel Murphy wrote:

> Today I found a peculiar problem where my audio only files (.wav, or
> .mov
> with only an audio track), would only play a few seconds of audio and
> then
> go silent. What I discovered is that they continue to play, and reach
> the
> end like normal but you can no longer hear it.
>
> I then took the "PlayMovie" example right from the Apple developer
> website,
> and striped it down to the code below.
> Why is it that I need a QTCanvas in order to play an audio only file??
> If I
> uncomment the 3 lines containing the myQTCanvas variable, I can hear
> the
> whole .wav file playing. If I leave them commented, it plays about 3
> seconds
> and goes silent.
> Is this a bug?
> I'm using windows 2000, JDK 1.3.1_06
>
>
> Noel Murphy
>
> /*
> * QuickTime for Java SDK Sample Code
>
> Usage subject to restrictions in SDK License Agreement
> * Copyright: ) 1996-1999 Apple Computer, Inc.
>
> */
> public class PlayMovie extends Frame implements Errors {
> public static void main (String args[]) {
> try {
> QTSession.open();
> // make a window and show it - we only have one window/one movie at
> a
> time
> PlayMovie pm = new PlayMovie("QT in Java");
> pm.show();
> pm.toFront();
> } catch (QTException e) {
> // at this point we close down QT if an exception is generated
> because it
> means
> // there was a problem with the initialization of QT>
> e.printStackTrace();
> QTSession.close ();
> }
> }
>
> public PlayMovie (String title) {
> super (title);
> // myQTCanvas = new QTCanvas();
>
> // add(myQTCanvas);
> addWindowListener(new WindowAdapter () {
> public void windowClosing (WindowEvent e) {
> goAway();
> }
>
> public void windowClosed (WindowEvent e) {
> System.exit(0);
> }
> });
>
> createNewMovieFromURL("C:\\venus.wav");
> }
>
> private QTDrawable myPlayer;
> private Movie m;
> private QTCanvas myQTCanvas;
>
> // This will resize the window to the size of the new movie
> public void createNewMovieFromURL (String theURL) {
> try {
> QTFile qtFile = new QTFile(new File(theURL));
> m = Movie.fromFile(OpenMovieFile.asRead(qtFile));
>
> myPlayer = new MoviePlayer (m);
>
> // myQTCanvas.setClient (myPlayer, true);
>
> // this will set the size of the enclosing frame to the size of the
> incoming movie
> pack();
>
> //no user control over MoviePlayer or MoviePresenter so set rate
> if (true)
> ((Playable)myPlayer).setRate(1);
>
> } catch (QTException err) {
> err.printStackTrace();
> }
> }
>
> public static void goAway () {
> QTSession.close();
> System.exit(0);
> }
> }
> _______________________________________________
> quicktime-java mailing list | email@hidden
> Help/Unsubscribe/Archives:
> http://www.lists.apple.com/mailman/listinfo/quicktime-java
> Do not post admin requests to the list. They will be ignored.
_______________________________________________
quicktime-java mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/quicktime-java
Do not post admin requests to the list. They will be ignored.
References: 
 >Why do I need a QTCanvas (JCanvas) for audio? (From: "Noel Murphy" <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.