A 4K HDMI video capture card is a specialized hardware device designed to capture and record video and audio content from 4K-resolution HDMI sources. These capture cards are commonly used for high-quality video production, streaming, gaming content creation, and other applications where capturing and streaming ultra-high-definition video is essential. Here are some key features and considerations for 4K HDMI video capture cards:

1. 4K Resolution: These capture cards support 4K video resolution, which typically refers to a resolution of 3840×2160 pixels (UHD) or 4096×2160 pixels (Cinema 4K). Ensure that the capture card can handle the specific 4K resolution you need.
2. Frame Rate: Check the maximum supported frame rate at 4K resolution. Common frame rates include 30fps, 60fps, and higher. The frame rate you choose depends on your specific needs, such as gaming, video production, or live streaming.
3. HDMI Compatibility: Verify that the capture card has HDMI input ports compatible with your 4K HDMI sources. Some capture cards may also have additional input/output options, such as audio jacks or SDI.
4. Pass-Through: Most 4K HDMI capture cards offer HDMI pass-through, allowing you to view the content on your monitor or TV while simultaneously capturing it on your computer. This is important for real-time monitoring and gameplay.
5. Encoding: Some 4K capture cards include hardware encoding capabilities, which offload the video encoding process from your computer’s CPU. Hardware encoding is especially beneficial when capturing 4K video, which can be resource-intensive.
6. USB Connection: Many 4K HDMI capture cards connect to your computer via USB 3.0 or USB-C for high-speed data transfer. Ensure that your computer has the necessary USB ports and bandwidth for 4K capture.