multiple Canon 1200D's are giving randomly "Canon EOS Full-Press failed" error

[benvb]

Hi,

I also commented on issue #30 because i think we are having the same problem.

So the error is as following:

Canon EOS Full-Press failed (0x2019: PTP Device Busy)
ERROR: Could not capture image.
ERROR: Could not capture.

I get this error quite random, sometimes after taking 3 pictures successfully, sometimes after 1 and sometimes after 10.
We are having manny 1200D and they all give this problem.

The command i use is the following "gphoto2 --capture-image-and-download"
Also i tried all the "eosremoterelease" options, but with no results.
My application don't need auto focus, so all tests are done with manual focus.

The log file you can find here
The version i am using is 2.5.10.1

Thanks!
Ben

[msmeissn]

if this happens on the first image capture for a gphoto2 call, I have found a timing problem and fixed this in git master. commit 8bdc423 . can you test?

[benvb]

Today i was testing your fix. It indeed solved the problem of random errors in my case.
But there is still a lag of a second before a picture is taken. With other cameras i don't experience this lag when executing the command "gphoto2 --capture-image".

Thanks for looking into this!

[ohens]

Thanks, this fix helped me, too!
I'm also having the 1 second gap before a picture is taken which I didn't have with other cameras and also don't have with v2.5.8.

[msmeissn]

I hope this fixes the 1 second gap, it at least does for me. If you could test your usecases, I hope i did not break anything :)

[ohens]

Hi, thanks for your fix!
The 1 second gap is gone now, but there is still an issue left:
If the camera is not able to gain focus and refuses to take an image, something seems to break.
I'm using libgphoto2 directly, the error code I get after taking a picture without being able to gain focus is '-110'. If I try to take another picture afterwards I got the error '-53' before your latest fixes. Now I get the error '-60'. I need to restart my system to be able to use the camera again.

[benvb]

It is indeed fixed, no other problems by so far. Thanks a lot!

Those errors of the comment above me i never experienced. In my case i'm using libgphoto through gphoto.