QuickTime API

[merry]

Hi all

http://doc.trolltech.com/qq/qq20-hiviews.html

I had used the above API of QuickTime to display movies , but the problem is
that i am having a list of files in QTreeWidget , on double click on an item , I am saving the file and then calling this API , the file Plays , but sometimes after playing some files, when i click on another file to play ,the balnk screen displays but the movie widget and controllers are not visible on the screen, I dont know why it is happening.

Regards
Merry

[jpn]

So, what do you expect us to do without giving a single line of code?

[merry]

I had given the link , In this link Full Source code is available for displaying movies (himovieview), I used same code , but the difference is this much only that in this , file is selected using QFileDialog and I am selecting file using QTreeWidget, that is I am having a QTreeWidget , in which there is a list of files, and on double click on the file , the player is being visible and load the file.

Regards
Merry

[merry]

Hi all

I think there is a problem of Memory Leakage in the QuickTime Player API. (http://doc.trolltech.com/qq/qq20-hiviews.html).
Source code is available in the above link
Can anybody tells me How to handle the problem of Memory leakage in this API.

Regards
Merry

[jpn]

I had given the link , In this link Full Source code is available for displaying movies (himovieview), I used same code , but the difference is this much only that in this , file is selected using QFileDialog and I am selecting file using QTreeWidget, that is I am having a QTreeWidget , in which there is a list of files, and on double click on the file , the player is being visible and load the file.

So, are you able to reproduce the problem with the example code? If not, most likely the problem is in your code.

I think there is a problem of Memory Leakage in the QuickTime Player API. (http://doc.trolltech.com/qq/qq20-hiviews.html).
Source code is available in the above link
Can anybody tells me How to handle the problem of Memory leakage in this API.

What actions did you take to verify that there is a memory leak? Also, I suppose you mean that the sample application has a memory leak.

[merry]

Thanks for the reply.

I saw it through the "ActivityMonitor"

Actually what i am exactly doing is this when the user double click on the file in the QTreeWidget, the file get saved and after saving the file , a signal is emitted for loading the movie in the MovieWidget, and when the movie is loaded , i 'll delete that saved file,

Through the activity monitor i saw , Till then free memory is available the files are loaded in the movie widget and when free space available is less than the file size then the widget appears but with no controllers , that is only a blank screen appears.

Then i thought its a Memory Leakage problem at the time of movie load.

Regards
Merry

[merry]

Hi all

I got the problem where the memory leaks.

On Every double click on the QTreeWidgetItem, When I call the QuickTimeMovie Player,then every time I' ll make the new Player, due to which there is lots of memory leakage.

Window *movieWindow = new Window(0);
  connect(this,SIGNAL(movieChosen(QString)),movieWindow,SLOT(OpenMovie(QString))),
  movieWindow->show();

Window *movieWindow = new Window(0);
  connect(this,SIGNAL(movieChosen(QString)),movieWindow,SLOT(OpenMovie(QString))),
  movieWindow->show();

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Is there any other way , that on doubleClick on the QTreeWidgetItem, I dont have to make the new Player.

If i make it member variable, then it crashes. what to do?


Regards
Merry

[jpn]

I got the problem where the memory leaks.

On Every double click on the QTreeWidgetItem, When I call the QuickTimeMovie Player,then every time I' ll make the new Player, due to which there is lots of memory leakage.

You allocate QObjects without parent and never delete them? Yes, that's a memory leak.

Is there any other way , that on doubleClick on the QTreeWidgetItem, I dont have to make the new Player.

If i make it member variable, then it crashes. what to do?

My wild guess is that even if you declare a member variable you assign to a local variable.

[merry]

Thanks 4 the reply

You allocate QObjects without parent and never delete them? Yes, that's a memory leak.

How can I stop this memory leak.

My wild guess is that even if you declare a member variable you assign to a local variable.

I declare it as a Global Variable.

[jpn]

How can I stop this memory leak.

Re-use same component or deallocate the previous one before allocating a new one.

I declare it as a Global Variable.

I'd advise not to do that. Using global variables tend to lead to unreadable and unmaintainable error-prone code.

[merry]

Hi

Re-use same component or deallocate the previous one before allocating a new one.

I am reusing the same component, but when i make it close, it crashes.

connect(btn_close, SIGNAL(clicked()), this, SLOT(close()));

and if I not close it using the above statement and close it using the close from the upper left corner , then it works fine,

What is the difference between the two close.

I had used the QPushButton to close ,To set the widget Modal.

Regards
Merry