21.4 AVI Video Selection
The basic Video Match operation is:
(1) Specify a Video File;
(2) Convert Video to Images;
(3) Treat the Converted Images as Directory Input covered earlier.
The only video format supported in this version is *.avi. If you need a different video format supported, customization will solve this problem.
After starting the chapter projects software, selecting an *.avi file in Figure 19.1, the ImageFinder will convert the avi video file to a set of images. After that, video recognition is converted into image recognition.
Example. Converting AVI Video:
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Start the software;
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Select the option, �*.avi File�;
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Click the �Source� button, and select file, �.\input_avi\clock.avi�;
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Click the �Play/Stop� button in Figure 21.1 to convert the button to a �Play� button;
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Click the �Play� button to play, which also converts the button to a �Stop� button;
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Click the �Stop� to stop the video;
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Click the �Change� button in Figure 21.1 to get Figure 21.2;
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Click the �*.avi to Images� button to convert the avi file to images.
Figure 21.1 Converting AVI Video File to Images, Step 1.
Figure 21.2 Converting AVI Video File to Images, Step 2.
The �Source� button selects an *.avi file, which in turn, calls the following functions:
int videoFilePointer = 0;
private bool searachSource6 ()
{
try
{
if ( f.openFileDialog1.ShowDialog () != DialogResult.OK )
return true;
bool b = f.openFileDialog1.FileName.EndsWith (".avi")
|| f.openFileDialog1.FileName.EndsWith (".AVI")
|| f.openFileDialog1.FileName.EndsWith (".Avi");
if (!b)
{
f.richTextBox1.Text = "Not *.avi file\n";
return false;
}
script.aviVideo70.setVideoFile ( f.openFileDialog1.FileName );
if ( ! script.aviVideo70.getVideoFileStatus() )
{
f.richTextBox1.Text = "Video Selection Fail!\n"
+ script.aviVideo70.getMessage ();
return false;
}
f.textBox2.Text = script.aviVideo70.getVideoFile () ;
script.aviVideo70.setVideoToImagesDir
(this.videoLiveParameters .imageOutputFolder);
f.richTextBox1.AppendText ( "Video To Image Directory: \n"
+ script.aviVideo70.getVideoToImagesDir () +"\n");
videoFilePointer = 0;
f.pictureBox2.Image =
script.aviVideo70.getBitmap (videoFilePointer);
}
catch (Exception ee )
{
f.richTextBox1.AppendText ( ee.ToString () +"\n");
return false;
}
return true;
}
This code will:
-
Select an *.avi video file;
-
Set the selected file to object, �script.aviVideo70�; and
-
Set the Video-To-Image Directory.
We will now explain this code. The first statement,
if ( openFileDialog1.ShowDialog () != DialogResult.OK )
return;
opens a file dialog box and selects an *.avi file. The next statement,
script.aviVideo70.setVideoFile ( f.openFileDialog1.FileName );
assigns the selected *.avi file to the script.aviVideo70 object. The next two statements,
script.aviVideo70.setVideoToImagesDir
(this.videoLiveParameters .imageOutputFolder);
f.richTextBox1.AppendText ( "Video To Image Directory: \n"
+ script.aviVideo70.getVideoToImagesD
creates the �Video To Image� directory, and prints a message to the text Box. The last statement,
f.pictureBox2.Image = script.aviVideo70.getBitmap (videoFilePointer);
prints the first image in the video.
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