Export video and GUI voukoder errors in Adobe Premiere.

There are several issues here:

• The log file is from the "old" Voukoder app, not from the pro version.
• You'd have to get a license. Voukoder Pro is now a commercial product.. Please go here to get one.
• The incorrect values may happen if you have tried a very old version of Voukoder Pro a long time ago. You can fix this by going to %localappdata%\VoukoderPro and delete the scenes.json file. Note: All you saved scenes will be deleted!

So, you now have ...

• Voukoder Pro
• FFmpeg (I can see the Scene Designer starts up and encoders are visible)
• You licensed the product (In title bar of the scene designer it says "Registered to <Your name>", not that it is unregistered)
• You deleted your scenes.json file and Voukoder Pro has created a new one after restart

That's good and sounds like it's supposed to be.

Now create a first simple scene in the Scene Designer by clicking Scene > Create > Simple and save it to the name Simple.

If you now perform a scene test... what happens? Please paste the output here.

2025-01-31 22:48:00 (error)    Unable to write format header.
2025-01-31 22:48:00 (error)    Open phase failed: -11

I don't have much experience with the Microsoft Foundation encoders, but it seems to work on your side, but the muxer can't write it. Maybe you can try a more standard encoder and muxer?

Yep, works! Now save the scene to a name. And select that scene name in your NLE and do an export.

Uncheck this setting here: