dispose my object in thread to get efficient memory usage

Question

I am using Accord.Net to show RTSP video stream in a worker thread as you can see :

Main_Form:

     VideoFileReader reader = new VideoFileReader();
     Thread Proceso1;
     Proceso1 = new Thread(new ThreadStart(updateui));
     Proceso1.Start();

And my function :

public void updateui()
      {
               reader.Open(RTSPAddress);

                while (true)
                {
                    Bitmap frame1 = reader.ReadVideoFrame();

                    pictureRTSP.BackgroundImage = frame1;
                }
        }

It works fine for some seconds but after that i get out of memory exception .So i want to know how can i dispose all object in thread?

Answer 1

Every iteration of the while loop is creating a new bitmap, but they are not being explicitly destroyed. Every time you read a frame and update the display, you need to dispose of the previous frame:

public void UpdateUI() // C# naming conventions
{
    reader.Open(RTSPAddress);
    while (true)
    {
        Bitmap previousFrame = pictureRTSP.BackgroundImage;
        Bitmap currentFrame = reader.ReadVideoFrame();
        pictureRTSP.BackgroundImage = currentFrame;
        if (previousFrame != null)
            previousFrame.Dispose();
    }
}

This should help, but there's still some other issues that you need to work out:

• What happens if an exception is thrown while trying to read the next frame?
• What happens when you reach the end of the video stream?
• What happens if the code above runs faster than the frame rate of the video?