Thanks Phil. That helps explain it.
Richard


On Apr 24, 2008, at 3:28 PM, Phil Davis wrote:

Hi Richard,

Digital camera access from within Rev can get pretty confusing - one camera works and another doesn't. When a camera presents itself to the OS under the USB mass storage device class, Rev can see it as a mounted volume. But when the camera presents itself under the USB still image capture device class and uses Picture Transfer Protocol (PTP) or some derivative to move images to your computer, Rev can't see it, at least not natively. That's my best guess anyway.

Sounds like an opportunity to write a Rev PTP library! ;o) If you do, I'll gladly show it off in my "Working with USB" session at RunRevLive.

Some references:

USB mass storage device class:
http://en.wikipedia.org/wiki/USB_MSC

USB still image capture device class and PTP (Picture Transfer Protocol):
http://en.wikipedia.org/wiki/Picture_Transfer_Protocol


Hope this helps -
Phil Davis


Richard Miller wrote:
Perhaps what I'm trying to do is impossible, or has to be done some other way entirely.

MY COMPUTER (under XP) identifies the camera as "canon powershot a410". If I double-click it, it opens to a window full of jpeg's (as I'd expect it to). But going into Rev and doing the following produces only "can't open directory" errors:

set the defaultfolder to ""canon powershot a410"; put the files

It doesn't matter if I put a colon after A410 or a colon and a slash. I just get errors.

The problem may also be that all the photos on this camera are on its SD card. Perhaps there's no way to get to them directly through Rev?

Thanks.
Richard



On Apr 24, 2008, at 2:30 PM, Richard Miller wrote:

How can I access a camera through Rev? I plugged in a Canon Powershot camera (USB). It shows up in My Computer with its name, but no volume number. THE VOLUMES function in Rev doesn't see it. I suppose I could use the Registry, but I'm hoping for some other approach. I need to be able to identify any camera plugged in via USB without knowing the model in advance.

Thanks.
Richard Miller_______________________________________________
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--
Phil Davis

PDS Labs
Professional Software Development
http://pdslabs.net

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