Even though VLC media player is considered as one of the best players, the error messages it screens annoy the users. Among those “VLC does not support UNDF format” is the one which prevents you from playing a video/audio file using VLC player.
“No suitable decoder module:”
“VLC does not support the audio or video format “undf”. Unfortunately, there is no way for you to fix this.”
UNDF in the above error code stands for “Undefined File Format”. VLC does not support UNDF format, the error message indicates that the VLC media player cannot interpret the file which you are trying to play, hence it considers it as Undefined format.
What Causes VLC Does Not Support UNDF Format Error?
Partially Downloaded File: If the internet connectivity is lost while downloading the file from the internet, then the file will be downloaded incompletely. And, while playing such incompletely downloaded videos or audio files, you may come across VLC does not support UNDF format error.
Outdated Version of VLC: If you are using an old version of VLC media player to play the file.
Unavailability of Codecs: When the correct codecs are not available to play the media file, then VLC may throw UNDF format error.
Corrupt/Damaged File: When the video or audio file you are playing in VLC is corrupt/damaged, then VLC does not support UNDF format error may pop-up.
Solved: How to Fix VLC Does Not Support UNDF Format?
Solution 1: Get the Video/Audio File Again
The simple resolution you must try to fix VLC does not support UNDF format error is restoring the file which is giving an error during the playback.
If you have downloaded the video/audio file from the internet, then re-download it. And, when downloading the file again, make sure you have stable internet connectivity.
If the file is not downloaded from the internet then, then try to get the new copy of it from the source.
In numerous cases, restoring the video/audio clip fixes the error VLC does not support UNDF format.
Solution 2: Update VLC Media Player
Outdated version of player often throws error messages at user during the playback and VLC is not exempted from this. So, if you are running an old edition of VLC media player then update it.
Uninstall the VLC player which you are running currently and go to VLC’s official website. Download the latest VLC player for your computer and install it.
Now, try to play the file which is giving VLC does not support UNDF format error.
Solution 3: Get Adequate Codecs
Codecs are mandatory for a player to play the video/audio files. If the necessary codec is missing, then the VLC media player cannot interpret the video or audio clip you are trying to play. Hence, it says “VLC does not support UNDF format”.
Open VLC Media Player and click Help button located at the top navigation.
Select Check for Updates… option from the list.
Click Yes when prompted to download the updates for current VLC player and codecs.
Browse and select the desired location to download the file (update) and hit OK.
Once the installation process is completed, go to the folder where you have downloaded the file and run it.
Solution 4: Repair the File
In case, none of the above solutions help you in fixing the error “VLC does not support UNDF format”, try to play the same file using other media players. If the file not at all plays on any player, then it is clear that the file is corrupt/damaged. So, repair your media file and then play it.
If, you are trying to play a video file of formats like MP4, MOV, M4V, AVI, DivX or Xvid then fix it with the help of Remo Repair MOV or AVI. The software can effectively fix your video files in just a single click and make them playable again.
How to solve VLC not playing MP4 issue, how to fix invalid AVI file, how to adjust audio sync in VLC player, or any other video playback issues can be effortlessly resolved using Remo Repair software in just 3 simple steps.
Step 1: Download, install and run the Remo Video Repair tool.
Step 2: Select the corrupt/damaged video file and click the Repair button.
Step 3: Play the repaired video file to verify the repair process.