I am using a Logitech c920 HD Pro Webcam with my Macbook Pro 17" (early 2011) and Mac OS Mavericks 10.9.5
I am able to record videos with Quicktime 10.3 where I have two options for "quality" with this camera: high or maximum.
The file size gets very large, especially in "maximum" where 80 seconds in an black and white (colour setting to 0) take up 2.6 GB already.
I think this camera is providing a H.264 stream which already should be compressed much more but Quicktime seems not to be able to load from that stream.
Also, the quality of the video seems to be rather blurry and not really Full HD.
I tried to install Final Cut Pro because there where some links on the net that provided this tip. With Final Cut Pro in its test version come several codecs that might provide a solution. But Final Cut Pro is not any more compatible with Mavericks.
Any hints how to capture the pre-compressed stream from the camera instead of the raw material?