Identifying a USB camera

[Richard Miller]

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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>>
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>
> -- 
> Phil Davis
>
> PDS Labs
> Professional Software Development
> http://pdslabs.net
>
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