I have given explicit information on the TV CARD.
ATI All-in-Wonder tv card is not very explicit....
The video card is irrelevant. There are some cards that combine these function but this is NOT one of them
If you would have answered this on the first page I would have known....
With that said, Tvtime as you know requires YUY2...which
is relevant to your video card/driver.You might have to edit your xorg file.Which is strange,because I haven't heard of a driver not supporting it in a long time.I suggested the gatos driver going on the assumption that you might have an older Ati card(which dose not support the overlay/yuy2 in nix without the proper driver).I did this because I haven't heard of nividia ever having this problem.You can try to open your capture devise in vlc also.It probably won't work because you need the right driver,or reinstall the driver(might be corrupt).All this is nay say.....unless we know what your hardware is....
Now.....please list your specs.