I did an installation on openSUSE and started kdenlive before ffmpeg was installed. I got a message avformat-module ffmpeg was missing. I installed ffmpeg, but the message is still there in the wizard.

You could try deleting your ~/.kde/share/config/kdenliverc file and rerunning kdenlive config wizard to generate a new one, that may solve the problem. You'll need "Show Hidden Files" chosen in your File Manager to see the '.' files.

Thank you. I've tried that one, but the problem is still there.

Hi

Make sure you get kdenlive, melt, mlt and ffmpeg from the Packman repository.
It should work than.

Kind regards,
Zebulon

Thank you, zebulon. You are right!