Re: how to enable liveview ?

I'm doing something similar from the camera's perspective.  I'm trying
to do motion detection by comparing preview/viewfinder images until I
see a change, then shooting a few full resolution pictures.

In a loop I do gp_camera_capture_preview() and gp_file_save().  Then
to take the big picture I do: camera_auto_focus() and
gp_camera_trigger_capture().  It's a little sluggish going from full
res back to preview but I think that's my stuff.

The preview images aren't big, like 320x240.  My D5200 has an HDMI
connector or you could use a low-res monitor plugged into the Pi.  The
official touch screen might be about right, then your program can
respond to touches.  Using a Pi also but working in C for the speed of
the compares.  I can look at every color (RGB) of every pixel and
still do 4 - 10 frames per second.  I've even run it on a Zero at
about 4 FPS.


On 6/4/18, Franck <[email protected]> wrote:
> Hi,
>
> i'm doing a photobooth project, based on raspberry, canon EOS 600D, and
> gphoto2.
>
> I would like the people to see themselves in the liveview, before
> pushing the button.
>
> So i made a little python script to take the picture when the
> photobooth's button is pressed.
>
> Everything works fine so far, except that each time i take a picture, my
> liveview go back to menu mode.
>
> If i take the picture with the camera's button, it stays in liveview
>
> If i use the Photobooth's button, which triggers the command gphoto2
> -take-picture-and-download , it leaves the liveview.
>
>
> Anyone as an idea why ? And better, a way to solve this problem ?
>
> For the curious, i'm doing something similar to this :
>
> http://www.w3sh.com/2013/03/29/photomaton-instagram/
>
> Thanks in advance for any help
>
>
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