So be patient! Here’s how to batch convert media files in VLC. MP4 conversion takes longer than MP3, partly because of file size but also the information contained within it. If you’re using an older computer, it’s going to take longer. If your computer has lots of RAM and a decent processor, the conversion time will be short. Video editing compilation and conversion takes a lot of memory. Much depends on the type of file, the size of it, the format you’re converting from and to and the specs of your computer. The actual conversion process may take time though. The process is exactly the same and contains only a few steps. Ideal for what we need it for! Batch convert media files in VLCBatch conversion in VLC works the same regardless of whether you’re converting audio or video. Given that the program is free, it is constantly developed, supported by a serious fan base and is very powerful. It works very well on mobile too, making viewing on the morning commute easier than ever. It’s free, small, uses very few resources and can play just about every popular media format out there. Also see our article Best Fix: VLC Does Not Support undf Format. You can even batch convert media files in VLC. All this and more can be done from within VLC. How To Batch Convert Media Files in VLCIf you create your own movies or download TV shows, you may find that the format doesn’t work with your TV or playback device. No suitable decoder module: VLC does not support. Undf Codec For Vlc Media Player File by Media Player Classic by installing K-Lite Mega Codec Pack.