Some issues with you know and think.
ATI AIW USB
finicky like PCIe cards, worse actually.
Resolved. Exact card error, not model error. Quite a good card, when not defective.
- Drivers sometimes refuse to install, card refuses to be seen, and BSOD/lockup issues happen.
- Card has zero cooling, gets hot as hell. This would melt itself under my use load. And I mean literally melt itself, I'm not exaggerating. I'm worried it could scorch the plastic case, literally melt it, maybe start a fire.
- USB design does make it work with modern hardware, and it does use ATI MMC 8/pre9.1 versions. So it does have that going for it. Standard WinVista/7 hackability, which is wibbly-wobbly.
Creative = no. It doesn't really work that I've ever seen. The awesome LSI Logic chipset is held hostage by a POS board. Unless somebody can find a way to write new drivers or something, it's a no-go.
ATI 600 USB uses Empia, but not generic EZcap/EZcrap usage. And has other varied chips inside, like TI. Remembers, chipset as the most important, but usage of the chips, and secondary chips in the device, also matter. That's why the LSI chip in JVC DVD recorders is amazing, and the LSI in Creatve cards is ho-hum.
Most Startech are just an Easycap rebadge. Issues abound on it. Startech generally makes nothing, putting their name on Chinese goods for a 10% to 100% markup. If you want an item now (within a week), you get Startech. If you're willing to wait a month from China, you get the OEM. Not just China, but all over Asia: Japan, Thailand, Taiwan, Vietnam, Hong Kong, etc.
Blackmagic is really nice HD card that has SD as afterthought. My initial testing years ago did not show me the many issues reported in later years. My testing methods are much different now, and due to hardware like that. BM has a dropped frames problem on lots of their hardware, and it has nothing to do with I/O, TBC, etc. It's in-device.
I do really like Pinnacle 510-USB thus also 710-USB boxes, for using with VirtualDub
and laptops. But those are somewhat overpriced compared to ATI 600 USB. I'm not sure what the difference is in 500-USB vs 510-USB anymore, it's been too long. I think the 500-USB is Dazzle rebadge, while 510 is new Pinnacle product.
USB came about because:
(1) Chips got smaller.
(2) USB2 had enough bandwidth
(3) Upgraded with computer (and even sometimes OS)