Video Acquisition: Save a Time-Limited AVI File

The window of the resulting application looks as follows:

The program starts by opening a built-in dialog that allows the end user to select a video capture device (.ShowDeviceSettingsDialog). Then, this live image data stream from the video capture device is displayed, using .LiveStart:

[C#]
private void Form1_Load(object sender, System.EventArgs e)
{
    icImagingControl1.ShowDeviceSettingsDialog();

    if( !icImagingControl1.DeviceValid )
    {
        Close();
        return;
    }

    icImagingControl1.LiveStart();
}

When the user clicks "Start Capture", the program stops the image data stream (.LiveStop) and starts recording the AVI file and a timer (.AviStartCapture, Timer1.Enabled = True):

[C#]
private void btnStartCapture_Click(object sender, System.EventArgs e)
{
    icImagingControl1.LiveStop();
    icImagingControl1.AviStartCapture( "video.avi", "DV Video Encoder" );
    btnStartCapture.Enabled = false;

    recordedTime = 0;
    recordTimer.Start();
}

The AVI recording is controlled by a timer. The event handler Timer1_Timer() is polled periodically, by the timer Timer1. Its actions are as follows:

• Read the recording time, as defined by the user (txtStop.Text)
• Indicate the expired time (lblRecorded.Text)
• Terminate the recording after the expiration of the defined time (.AviStopCapture)
• Restart the live image data stream (.LiveStart)

[C#]
int recordedTime = 0;

private void recordTimer_Tick(object sender, System.EventArgs e)
{
    recordedTime += 1;
    lblRecordedTime.Text = recordedTime.ToString() + "s";

    if( recordedTime >= int.Parse( txtStopTime.Text ) )
    {
        recordTimer.Stop();

        icImagingControl1.AviStopCapture();
        icImagingControl1.LiveStart();
        btnStartCapture.Enabled = true;
    }
}