<meino.cramer <at> gmx.de> writes:

> the Logitech c920 HD Pro webcam is able to deliver 1920xq080x30fps
> (H.264).

Some interesting notes and comments at the bottom of this page:

http://www.ideasonboard.org/uvc/


Also, in the past, I have found the best comments on various camera
hardware in the relevant kernel driver. Sometimes that is a unique
driver, other times it is a unified kernel driver for a similar group
of video cameras. Sometimes you can go way back to where the kernel
driver for a given video camera first appeared (got supported) in the linux
kernel for detailed information on the limitations of a given piece
of hardware. Often, the poorer performance on Linux, was intentionally
due to the actions of the manufacturer, particular on max frame rate,
bit minipulations and other key parameter settings of the cameras. Once 
folks learned the protocols (decoded them) on windows, they would make
those adjustments with windows software and reverse engineer the 
driver software so as to be able to support various linux drivers.

Logitech is very reasonable (at least compared to other vendors) but even
there newer hardware rarely works with the best of a given feature set,
until the product has been out for a while. If not, Logitech should
have a published interface specification so and to make reverse engineering
not necessary?

Dunno know the specifics on the model your listing, as I've been out
of that 'game' for a while now, but all those tigers still have the same
stripes....

Good hunting!
hth,
James




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