Before converting,in front of Source Video in list it displays
when you're converting media file, it displays
and you have converted successfully,it displays
1.Hit button to set output video file format. At the same time,make some setting:
2.video and audio setting
3.size setting
you can hit to add another media file. hit to delete media file.
hitto clear all media files.
Hit button to start your conversion.
to Add files to the list, select a video file from your Hard disk
to select Destination that you want to save.
to preview movie clips, or you can press
to stop preview. 
to delete media file.
to clear all media files.
