21.2   Class Library Overview

This Class Library will break a *.avi video into images by an algorithm like this:

For ( I = start; I <= end; I += step )

{

        get Frame I from the video;

    save the image to image_I.jpg;

}

To enter a video *.avi file, use these functions:

void setVideoFile (String s);

string getVideoFile ();

bool getVideoFileStatus();

The converted images are saved to a folder, called “Video To Image” directory. To set the “Video To Image” directory, use these functions:

void setVideoToImagesDir (String s);

string getVideoToImagesDir ();

bool getVideoToImagesDirStatus();

The breaking algorithm requires the starting frame number, the ending frame number, and the skip steps. The following functions are for this purpose:

int getFrameNumberStart ();

    void setFrameNumberStart (int i );

    int getFrameNumberEnd ();

    void setFrameNumberEnd (int i );

    int getFrameNumberStep ();

    void setFrameNumberStep (int i );

To get the number of frames from the video file, use: 

int getNumberOfFrames();

To get a particular frame, use:

    Bitmap getBitmap (int i);

To convert *.avi video to images, use:

bool videoToImages ();

Before calling videoToImages(), you should set the:

•    “Video To Image” Directory;
•    Starting Frame Number;
•    Ending Frame Number; and the
•    Skip Steps.

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