Since our computers were equipped with floating-point processors, countless music enthusiasts or experts have been busy with the application of audio/video encoding technology on PCs. This can be seen from the various different audio and video formats that people encounter today. Although the content has become richer, current playback tools cannot play all formats of audio and video files, and often encounter situations where they cannot play during playback. In response to this situation, many people have started trying to convert these different file formats. However, faced with numerous formats, %E...