If your converter doesn't recognize M4A or MOV files, it usually means the software doesn't support those formats or the codec is missing. A simple solution is to use Softaken Audio Video Converter; the tool supports almost all audio formats, such as MP3, WAV, OGG, FLAC, etc., and video formats such as MP4, MKV, AVI, MOV, etc. It also provides you with the automatically correct settings for each file, and you can choose the output format easily. The tool supports batch conversion, allowing you to convert multiple files at once without errors. It is fast and reliable, and works smoothly on all Windows versions. You can also get the free demo version and try the hassle-free application.