Re: Modifying and recompiling Libgphoto2 library

Hi,

Sony Alpha 7R4 should be covered by the generic Sony Alpha support, 
although it seems to be a bit different and we have some reports
that its not working as well as previous models.

For the 20-30 seconds it seems to be running some error / timeout, a debugtrace
might be helpful.

Ciao, Marcus

On Wed, Mar 04, 2020 at 06:06:14PM -0500, Alan Corey wrote:
> The supported camera list is at
> http://gphoto.org/proj/libgphoto2/support.php, I'm not sure about that
> model.
> 
> Of course, just go to https://sourceforge.net/projects/gphoto/files/
> and grab a tarball.
> 
> 20-30 seconds sounds long but it will depend among other things on the
> size of the image and your USB connection.  I was able to get several
> viewfinder images per second.  For the fastest speed use libgphoto2
> and write something yourself in C.  There are example programs
> scattered around.
> 
> On 3/4/20, mohammadst 111 <[email protected]> wrote:
> > Dear technical-support team,
> >
> > I am a software developer and I have recently tried to capture images
> > programmatically from two available cameras( Sony Alpha7R IV and Nikon
> > Coolplex S6000). I could successfully capture and download images from
> > Nikon Coolplex S6000 camera, but unfortunately, I encountered the "Could
> > not capture" error message while using "gphoto2
> > --capture-image-and-download"
> > command, or any other similar commands, for Sony Alpha7R IV.
> >
> > Now, I have the following three questions that I would greatly appreciate
> > it if you could answer them:
> > 1. Is the "Sony Alpha7R IV" camera supported by gphoto2, and in turn by
> > libgphoto2, or not? If no, what can I do to fix the error and capture
> > images from this camera?
> > 2. Is that possible for developers to have the source of libgphoto2 and
> > customize that for their applications? If yes, Is there any instructions
> > for recompiling it from scratch?
> > 3. Why does it take so long (around 20-30 sec) to capture and download
> > images from cameras using gphoto2? Are there any solutions to hasten and
> > improve this process?
> >
> > Sincerely,
> > Mohammad Sajad Tabatabaeian
> >
> 
> 
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