Why do I get this error message when I try to load and convert a file?

Related software: HD Video Converter Factory Pro and Free HD Video Converter Factory and WonderFox DVD Video Converter

Error content: Failed to import the following file(s). because of damage, unsupported format or DRM protection.

Case 1: The file is encrypted so it cannot be loaded or converted.

Case 2: The file format is not supported.

Some video and audio formats are proprietary formats and cannot be loaded, played or converted by any other software than the one that generated them.
This kind of situation will be explicitly stated in our online tutorials. You can search for the format of the file you want to convert in the below link to find the corresponding tutorial to see if the format is supported by our software.
https://www.videoconverterfactory.com/tips/top-list-convert.html

Case 3: The file you try to load is not an actual video or audio file so it cannot be loaded or converted.

It might be a project file that only references to video and music files, edits, transitions, special effects, etc. and contains no video/audio data.

Like case 2, this kind of situation is made clear in our online tutorials. You can search for the format of the file you want to convert in the below link to find the corresponding tutorial to see if the file is a real video or audio file.
https://www.videoconverterfactory.com/tips/top-list-convert.html