HDMI capture card for a Power PC G5

BlackMagic's Intensity is the least expensive solution, but only works in PCI-Express slots and technically isn't supported in G5s at all. I've been using one in my G5 Quad for over a year now and it generally does a good job. There is some system instability that results from the unsupported nature of the card, but I've been able to capture from analog sources with it just fine. Have not tried the HDMI capture.

For an officially supported solution, the DeckLink Studio has HDMI input but is more expensive. It also requires a PCI-Express slot.

I apologize - I thought it was the Studio card that had official G5 support, but when I re-read the specs page, it looks like it is only the HD Extreme card is the only supported card in the G5.

That being said, I was also told by BlackMagic that the Intensity wouldn't work in the G5 either (although they declined to elaborate as to why), but it does work and every driver release has been Universal. Like I said in my original post, I believe that the card is the source of some system instability, but if you're not doing capture very frequently, then you can remove the card when you're not going to be using it (which is what I do sometimes). I've only used the Intensity Pro to capture from S-video sources, but it works fine and the video output to a monitor also works as well.

I have no information for you on converting HDMI to DVI or ethernet. Might want to ask in the Final Cut forum.