Converter utilities capable of undf file to mkv format conversion.
Sometimes VLC (VideoLAN) player makes error message that it does not support "undf" audio or video format. This is makes some users to try to convert their (usually perfectly fine) media files to something else. This error is prompted when a proper decoder for the video format is not loaded in VLC.
So for example .mkv videos can occasionally cause this error. You do not need to convert anything, you need to check for a new version of VLC player or codecs. Sometimes partially downloaded files cause this error, in this case you need to either finish the download in process, or download the file again. You will not find any converter that recognizes "undf" format anyway.
Unfortunately, there is no detailed software record in the database for this conversion.
This conversion entry was verified by us and conversion from undf to mkv was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it can't be done because incompatibility between programs, caused by closed file formats, very limited support or by other problems.
If you find entry that you feel is flagged as bad wrongly, please tell us in the discussion form below with as much as information as possible so we can fix it.
Additional links: Open undf file, Open mkv file
UNDF
Files with undf file extension can be typically found as files in some kind of Undefined File Format. Most likely highly specialized.
MKV
Files with mkv extension are videos in the open source Matroska Multimedia Container format. You can open it and play it with pretty much every multimedia player.
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