The best digital cinema capture card is the DeckLink 8K Pro from Blackmagic Design. DeckLink 8K Pro supports all SD, HD, Ultra HD, 4K, and 8K DCI frame sizes and has four quad-link 12G-SDI connectors. You receive complete Rec. 2020 colour support for 8 and 10-bit YUV 4:2:2 and 10 and 12-bit RGB 4:4:4. Additionally, you may operate at 120 frames per second in HD and 4K and up to 60 frames per second in 8K. A total of 64 channels of embedded audio are supported across the four 12G-SDI connectors. The newest high resolution, high frame rate, and high dynamic range workflows are ideal for DeckLink 8K Pro!

Connections
SDI Video Inputs
4 x bi-directional 12Gb/s SD/HD/2K/4K/8K.Supports single, dual link and quad link 4:2:2/4:4:4. 2D/3D switchable.
SDI Video Outputs
4 x bi-directional 12Gb/s SD/HD/2K/4K/8K.Supports single, dual link and quad link 4:2:2/4:4:4. 2D/3D switchable.
SDI Audio Inputs
16 Channels embedded in SD/HD/2K
64 Channels embedded in 4K/8K
SDI Audio Outputs
16 Channels embedded in SD/HD/2K
64 Channels embedded in 4K/8K
Sync Input
Tri-Sync or Black Burst
Computer Interface
PCI Express 8 lane generation 3, compatible with 8 and 16 lane PCI Express slots