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Posted by John Navas on 01/18/08 20:31
On Fri, 18 Jan 2008 19:45:25 +0000 (UTC), davem@cs.ubc.ca (Dave
Martindale) wrote in <fmqvkl$39k$1@swain.cs.ubc.ca>:
>Even when DV cameras *do* have a USB2 port which they use to transfer
>still images at high speed to a computer, they generally just do not
>have firmware support for transferring the DV video data over USB2 -
>even though USB2 is plenty fast enough for the 25 Mbit/s DV data rate.
>
>I happen to own a Canon Optura 60, which is one of the few DV cameras
>that can transfer full video data over USB2. But it requires special
>software on the computer end, and the software only works under some
>versions of Windows, and it's not clear whether you can use the editing
>program of your choice to capture the data even then. In comparision,
>every DV camera provides a Firewire port that will do data transfer as
>well as providing some amount of remote device control, and essentially
>every editing program supports capture via Firewire. So that's the way
>to go, even with a camera that theoretically supports USB2 as well.
It's probably more the issue of Firewire being designed for high-speed
independent transfers, whereas USB is controlled by host polling. See
my prior post to this thread.
>My former computer was old enough that I had to buy a Firewire interface
>card for it. But anything you buy today will probably have a Firewire
>port or two on the motherboard.
Most laptops do not have Firewire, and many desktops don't have it
either, although it is simple and cheap to add to either. I use a
4-port PC Card with my ThinkPad that cost me all of $30 at retail.
--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others)
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