Once you run the program the following window will appear. It's a quite simple and easy to use interface which shows you the main functions of the program!
Let's click on the All to MPG1 button. A new window will appear. Here you can load the video you want to convert by browsing to its location (1). The output directory and filename will be completed automatically.
Once you are ready click the convert button. Some last configuration is left to be made such as the Frame Rate of the output video and its size. Once the conversion is completed you can browse to the output directory and view your new video file. You can use the preview window to watch the whole operation or not by disabling it. The procedure is the same for All to MPG2 conversions.
WinMPG also supports conversion of video files to matroska mkv ones. Again click on the blue arrow and select subtitles. Here you can choose a video file and its subtitles and the program will create an mkv video file. In a few words WinMPG is a pretty good all in one video converter! You can download WinMPG to give it a try. The limitations of the trial version is that it adds a watermark in every video you create. To remove the watermark buy WinMPG.