Performer from filename

Hi,
I have a bunch of old videos named “performer - title.mp4”
What’s the best way to get the performer tag from the filename ? I got the title but no luck for the performer

Probably “Settings –> Tools –> Scene Filename Parser” and use a Filename pattern like

{performer} - {title}.{ext}

Yeah, that’s what I tried, it got the title right but nothing in the performer tag