Now that my video production activities are all desktop-based, my habit of handling video crosses paths with my long-standing affection for small form factor computers. For the past year I’ve used a fanless Airtop-PC from CompuLab as my primary desktop workstation. It has shown itself to be a very capable host for vMix, which is my very favorite live video production tool.
Over the last couple of years I’ve been exploring the realm of webcams. Along the way I’ve encountered some confusing things involving the Microsoft LifeCam Studio. To be more specific, some have claimed that it’s capable of delivering 1080p video, while Microsoft’s own information suggests otherwise. My recent experiments using vMix have shed some light into the actual capabilities of this inexpensive little webcam. I thought them worth sharing.
“You cannot change the laws of physics, Captain.” – Montgomery Scott
Remember that a USB 2.0 connected webcam is bandwidth limited to delivering a maximum of 480 mbps (60 Mbytes/sec) to the host computer. Because of this fact, and given that the video frames from the webcam are uncompressed, the USB 2.0 link can only deliver 720p30.