Video format 'undf'?

Hello, I really hope someone can help because I don't know much about codecs, except that they're necessary.

Getting an error on playing a few video files. No suitable decoder module: VLC does not support the audio or video format "undf". Unfortunately there is no way for you to fix this. The audio loads with no problem, but no video.

Has anyone seen this before? A solution or a place to start researching would be amazing, thanks.

"undf" means undefined. So it is an unknown format. Maybe MediaInfo is able to provide more useful details about the file.

What kind of file extension do those files have? If it is something common, then it is possible the files are damaged or fake.

Thanks, it's probably a folder of corrupt files then. Matroska, so it's nothing too unusual, other .mkv's are working on this machine.

Cheers

I have downloaded a video from a website to do my assignment but a video shows an error. can someone help me out, please?

Copy and paste the full error message here.