Here are the 10 best free Batch Video Converter software for Windows 11/10 to batch convert video files & support multiple file formats. MP2, MP3, OGG, 3GP. 3G2, AVI, FLV, MKV, MP4, MOV, etc Select Environment Variables from the Advanced menu. Click “Edit” after selecting “Path.”. Select New and type the following path: C:\ffmpeg\bin\. That is all there is to it. With FFmpeg, you may utilize Command Prompt to convert media files. Part 4. How to Convert MP3 to MP4 with Windows Media Player ; Part 1. How to Convert MP3 to MP4 Batch with Best MP3 to MP4 Converter. There is no dearth of conversion tools, but selecting the right one is very important to ensure quality conversion at fast speed and additional features. I was under the impression you could just switch the file extension from "MP4" to "MP3". You should be able to do that with VLC. For multiple files you can write (read: copy, paste, edit, save) a batch file to do multiples for you. I know this is listed as solved, but I also wanted to recommend the Free Studio suite. ZNipDS.