If you're set on capture cards, searching "USB HDMI capture cards" on Amazon usually yields a bunch of cheap ones ($10). I use a $50 one like this (currently on sale for 30 something), which is fine for my purposes (I'm not using it for gaming). I can't remember if the G7 has a mini-HDMi out, but I don't see why that wouldn't work (mini-HDMI to HDMI)