Ahh yesss. After examining the output message, I vaguely remembered seeing output of the form 'd####' when I queried for configuration parameters. That again piques my interest to enquire about those output lines resulting from
    $ gphoto2 --list-config
that contain output
    /main/other/5###
        ...
    /main/other/d###

In particular the one in question, 'd103' for the D70
    $gphoto2 --get-config=/main/other/d103
    Label: Maximum Shots                                                          
    Type: MENU
    Current: 9
    Choice: 0 0
    Choice: 1 1
    Choice: 2 2
        ...
    Choice:49 49

So my questions:

1) Why don't these configuration parameters have "human readable" names like the ones in
/main/{action settings status imgsettings capturesettings}?

2) How do I go about finding out what the /main/other/* parameters actually mean? Is there a Nikon SDK I could consult?

On Thu, Apr 12, 2012 at 2:45 AM, Rogier Wolff <R.E.Wolff@bitwizard.nl> wrote:
On Thu, Apr 12, 2012 at 11:36:24AM +0200, Marcus Meissner wrote:
> On Thu, Apr 12, 2012 at 02:02:41AM -0700, daaawg wrote:
> > gphoto version 2.4.5 controlling Nikon D70
> >
> > Whenever I
> >     $ gphoto2 --capture-tethered --hook-script test-hook.sh
> > I get the following, sometimes multiple instances
> >    UNKNOWN PTP Event 4006, Param1 0000d103
> > It does not appear to affect operations as after it appears I can trigger
> > the shutter release, the image download occurs and the test-hook.sh
> > completes.
> > Should I be concerned?
>
> No. It is basically reporting all PTP events via the "UNKNOWN" event type and
> there is no special handling for the PropertyChanged PTP event yet.
>
> 0xd103 would be PTP_DPC_NIKON_MaximumShots

Ah!

That would probably be the number of remaining shots that the camera
has RAM for. You can shoot at 3 FPS on the D70 until this reduces to
zero, after that the CF card determines the shooting speed.

       Roger.

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