Hi Marcus.
Thank you for ideas.
I tried the same things with gphoto2.5.14.
5 shots by --capture-image-and-download works really faster: 21.6 sec
instead 30 sec. But still terrible slow - if difference is only with jpeg
transfer, that means 700d sends 7mb data for 15 seconds via 480Mb/s channel
!
See details: https://drive.google.com/open?id=0B79T6_pg7ncVU1ZVdU1WTmdIWEk
Looks like --trigger-capture works even some slower: 5.9 sec instead 4.65
sec. See details on the
https://drive.google.com/open?id=0B79T6_pg7ncVUEZIUm5penpDTk0 and
https://drive.google.com/open?id=0B79T6_pg7ncVZzdyTmhKZEdsSkU.
So, the same question: can you recommend something for decrease shooting
time ?
Is it possible to control every shot event in the burst(continuous) mode ?
WBR, Alex.
On 15 June 2017 at 22:20, Marcus Meissner <mar...@jet.franken.de> wrote:
> Hi,
>
> On Tue, Jun 13, 2017 at 11:43:37AM +0300, Aleś Bułojčyk wrote:
> > Hi All.
> >
> > My goal is to checking ability to use libgphoto2 in future for shooting
> > pictures by computer control. It would be great to have 2 pictures per
> > seconds speed.
> >
> > For testing, I'm trying to use gphoto2 2.5.9 with Canon 700d.
> > I'm using S1 picture size with lens switched to MF. As far as I
> understand,
> > capturetarget switched to SDRAM by default:
> >
> > $ gphoto2 --get-config capturetarget
> > Label: Capture Target
> >
> > Type: RADIO
> > Current: Internal RAM
> > Choice: 0 Internal RAM
> > Choice: 1 Memory card
> >
> > I tried to make 5 shots by --capture-image-and-download command, but 5
> > shots was required ~30 seconds ! See debug info at the
> > https://drive.google.com/open?id=0B79T6_pg7ncVX2w5WktESWZ6Qmc
>
>
> In SDRAM we currently downloaded the images immediately to not lose
> control over
> them. This takes some time.
>
> For card capture they would be stored on the card.
>
> The traces you have waste 2 seconds waiting for focus, which I fixed in
> 2.5.10.
>
> So upgrading to a newer release will already save you 2 or more seconds
> every image.
>
>
> > I tried also way when picture will be stored on camera. I will retrieve
> it
> > later. Command is : "--trigger-capture --wait-event=FILEADDED". 5 shots
> was
> > require 4.65 seconds. It's much better, but still too slow. See
> > https://drive.google.com/open?id=0B79T6_pg7ncVUDcteHlPdW9YTFE
> >
> > There are some questions:
> >
> > 1. Why downloading of ~1.2 mb picture requires ~5 seconds ? It's
> difference
> > between capture-and-download and trigger.
>
> trigger capture did not wait for the focusing I think.
>
> > 2. Can I decrease shooting speed by some other parameters ? I'm already
> > using MF.
> >
> > 3. By the http://www.imaging-resource.com/PRODS/canon-t5i/canon-
> t5iA6.HTM,
> > camera should require 0.36 sec for shooting and ~0.15 for transfer.
> >
> > 4. I understand that 700d should lock up mirror before every shot. And
> it's
> > impossible to lock up it once, then shooting. If I will use Canon EOS
> M10,
> > it should work faster since there is no mirror. But
> > http://www.imaging-resource.com/PRODS/canon-eos-m10/canon-eos-m10A6.HTM
> > reports 0.7 sec shooting speed. Canon PowerShot G9 X requires even 0.88
> > sec for shooting by the
> > http://www.imaging-resource.com/PRODS/canon-g9x/canon-g9xA6.HTM. Why
> they
> > are so slow ?
> >
> > 5. Are there any good-supported faster but not expensive cameras ?
> Picture
> > quality is not so critical.
>
> It would be good to repeat with 2.5.14.
>
> Ciao, Marcus
>
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