Re: Canon 1300D: can only capture one image; second capture fails

> Marcus Meissner <[email protected]> hat am 6. Februar 2017 um 08:36
> geschrieben:
>
> > The shutter releases with every call. But after saving the file, gphoto
> > get's an
> > error -1:
> > UNKNOWN PTP Property d11b changed
> > UNKNOWN Camera Status 1
> > UNKNOWN PTP Property d11b changed
> > Saving file as capt0000.jpg
> > UNKNOWN Camera Status 0
> > *** Error (-1: 'Unspecified error') ***
>
> You have a typo in the commandline ... "+--set-config" should be
> "--set-config"
 
You're absolutely right. That fixed the issue. I saw the plus but thought it was
intentional. It was obviously generated by my mail client.

> I am also wondering if you can decrease or increase the wait after after the
> "Press 2",
> which is the time we hold down the virtual shutter button.
>
> I see you reduced it from 100ms to 80ms already.
>
> (The gphoto capture code currently does not have a wait there, which is
> probably
> the core issue.)
 
>From my tests only the first wait seems the has an impact. I reduced both waits
after Press 1 and 2 to 0 and iterated ten times without problem.
 
for i in `seq 9`; do rm capt0000.jpg; gphoto2 --wait-event=270ms --set-config
eosremoterelease="Press 1" --wait-event=0ms --set-config eosremoterelease="Press
2" --wait-event=0ms --set-config eosremoterelease="Release 2" --set-config
eosremoterelease="Release 1" --wait-event-and-download=2s; done
 
> > In the for loop, the jpg always contains the first image that was taken in
> > that
> > sequence. I moved the camera in between so that the image should differ. But
> > it
> > was always the first image from that loop.
 
The problem that always the same photo is written to disk still occurs. It
occurs even if I execute two single capture statements manually. I have to wait
some seconds between both calls and then the correct images were written to
disk.


Regards, Oliver

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