1. Currently I am using a Blackmagic DeckLink HD Extreme to capture SDI using their Blackmagic Design Media Express and saving uncompressed AVI (it doesn't offer any compressed format).
Is there another software compatible with this card and be able to save a compressed format?

2. I might need to add more SDI inputs, checking the nvidia Quadro SDI Capture card which says that it can capture up to 4 SDI single links sources simultaneously. Has anyone tried this? What software can capture 4 simultaneously and what formats can they be saved?