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[Solved] Fix VLC Does Not Support UNDF Format

by Christine Smith • 2024-01-11 10:30:10 • Proven solutions


UNDF refers to an undefined file format, which means the player cannot define the format or recognize it. Each time when trying to play a video file that is not completely downloaded, we'll receive a UNDF format error. And there's no exception for a VLC media player. WHen you play UNDF file using VLC player, you would receive the error VLC does not support UNDF. UNDF format error may also result from a corrupted file, some internal issues within the video, or non-availability of appropriate codes required to play. In all, the chances are that you'd face the problem that displaying "No suitable decoder module: VLC does not support the audio or video format ".undf." Unfortunately, there is no way for you to fix this."

(You may also want to know about vlc convert to mp4 details)

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Find more video ideas from Wondershare Video Community.

Don't lose heart after seeing the above screenshot; a situation cannot be that worse if you are sure the video file is good. In that case, there're steps below that need your attention to fix UNDF error in the VLC player.

How to Fix VLC Does Not Support UNDF Format

The following are the detailed steps for fixing "VLC does not support UNDF Format" issue. To do it, you need to install all the required audio and video codes on the system to make sure they can support all the file formats efficiently on the network.

Step 1 Go to the official website to get the latest version of VLC, which usually rectifies the error shown in the previous versions. If it doesn't work, continue the steps below.

Step 2 Download Combined Community Codec Pack that provides a complete list of all the essential audio or video codec required to play the media file format.

UNDFFormat setting

Step 3 Install the Combined Community Codec Pack and do the needful, as seen in the screenshots.

fix flv not support UNDFFormat

Step 4 After that rerun the file in VLC, the UNDF file should be running in VLC properly without any error. If not, then move on to the next step.

Step 5 Right-click on the file and select open with MPC-HC, now the video file should be played smoothly.


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Christine Smith

Christine Smith

chief Editor

Resource > VLC Users > [Solved] Fix VLC Does Not Support UNDF Format