how to convert rmvb to mp4 download?
['Upload RMVB-file. Click "Choose File" button to select a rmvb file on your computer. RMVB file size can be up to 50 Mb.', 'Convert RMVB to MP4. Click "Convert" button to start conversion.', 'Download your MP4. When the conversion process is complete, you can download the MP4 file.']