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1. superboom12s commented on Jan 8, 2026

   

   superboom12s

   on Jan 8, 2026

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   Hi there, hope this helps you almost a year later.

   Well, using it is quite easy, however, there is a lack of documentation for some reason...

   How to use it on Windows?

   1. Open CMD.
   2. Navigate to the directory where the encoder is located. If you don't know how, you can go to the file explorer, copy the route of the directory and use cd [What you copied].

   you should be able to skip this step if you open CMD directly on the directory where the encoder is, however, I don't know if Windows lets you do it, but if it doesn't its just because Window's CMD sucks in any possible way...

   3. Ensure you have the necessary runtime installed for .NET.
   4. Now, you can convert any mp4 file to fv using: FastVideoDS.bat [route to the source video].mp4 [route to the output video, ensure it doesn't exist yet].fv with the CMD you prepared before.

   And how to do it on Linux/MacOS and generally Unix-like systems?

   You can use Wine, there is supposedly to be a method for Unix-like and the owner clarifies how to use it here, however, C# is not made to run on Unix and Microsoft gatekeeps it for Windows, so it is a bit confusing the method to use it on Unix, BUT we can follow the method of Windows on Unix using Wine. You will still have to install .NET runtime, but you can install the Windows version with Wine normally. After that, you can run /home/$USER/.wine/drive_c/windows/system32/cmd.exe, which will open the Wine debugger, that is pretty much a Windows terminal with some small limitations.

   Now, you can follow the Windows process exactly the same, but keep in mind that copy and pasting, arrows or TAB won't work here.