From the project's website:
"TV-Viewer is a frontend to watch and record TV. It is designed for analog TV cards working with the ivtv, pvrusb2, or cx18 driver and others with a built-in hardware MPEG-2 encoder. It uses the Tk toolkit. DVB support is planned in the future. "
Any hint whether it's useful for other cards (i.e. those that don't MPEG encode) as well?
I've seen that viewer apps for those that do MPEG-2 encoding are hard to come by, so thanks for finding this and sharing the info.