If your converter cannot work with the latest MP4 codec, then Softaken Audio Video Converter is the ideal option. It supports all of the latest audio and video formats, including the latest MP4 codec, so you can convert the files without any issue. Simply choose the output format of your choice, and set the codec, bitrate, and resolution settings to get things working on your device as needed. The ability to do batch conversions is a great time saver when you have multiple files to convert, even when working with different codecs. You will even see a real-time preview of your files before saving them in order to double-check everything is correct. It works seamlessly on any of the latest versions of Windows. You will also get a free demo version, which shows you how to use the program before you purchase it. Fast, secure, and easy to use, it will make any media conversion easy.