Canon EOS 5D Mark IV: ERROR: Could not capture image.

[francophongvu]

Hi,

My gphoto2 version :

gphoto2 2.5.17 gcc, popt(m), exif, no cdk, no aa, no jpeg, no readline libgphoto2 2.5.18 all camlibs, gcc, ltdl, EXIF libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb usbdiskdirect usbscsi, gcc, ltdl, USB, serial without locking

I tried to capture photo with command: gphoto2 --set-config capturetarget=0 --capture-image-and-download

I received the error:

ERROR: Could not capture image.                                                
ERROR: Could not capture.

Please help to advice me.

[msmeissn]

can you capture debug output? add --debug --debug-logfile=logfile.txt to the commandline

[francophongvu]

Hi, Sorry for late reply, I followed your instruction to write debug log for capturing photo. Kindly attach the logfile here for your ref.

I tried to read all log, but little understanding, could you please to advice me. Thanks a lot logfile.txt

[msmeissn]

hgmm, so we trigger the capture after getting focus, but for some reason no feedback appears. some stuff is happening 30 seconds later, but no object is added. does this happen always? is the shutterspeed 30 seconds, or is this just an artefact?

[sepehrhm]

This is happening for me too - it has nothing to do with the shutterspeed by the way. It always struggles to capture an image, and I am using 2.5.22 release (from yesterday).

Is this the new way Canon cameras are programmed?

[wvreeven]

What works for me is to always do this sequence of commands:

gphoto2 --reset; gphoto2 --set-config /main/imgsettings/imageformat=32; gphoto2 --set-config /main/actions/eosremoterelease=5; gphoto2 --set-config /main/actions/cancelautofocus=0; gphoto2 --auto-detect --capture-image-and-download

Only then gphoto2 2.5.23.1 (downloaded and compiled from the GitHub sources today along with libgphoto2 2.5.25.1) will work for me. If I leave any command out either capturing an image will hang and I need to press CTRL-C or I get this error

*** Error ***
Canon EOS Full-Press failed (0x2019: PTP Device Busy)
ERROR: Could not capture image.
ERROR: Could not capture.
*** Error (-110: 'I/O in progress') ***

If I try this with the gphoto2 and libgphoto2 versions that come with Raspbian Buster (2.5.11-1 and 2.5.12-1) this doesn't work.

[wvreeven]

Actually, I switched off and back on the camera and now it is not working anymore. It occasionally reports

*** Error ***
Canon EOS Capture failed to release: Perhaps no focus?
ERROR: Could not capture image.
ERROR: Could not capture.

and at other times it simply hangs. After a while it reports

ERROR: Could not capture image.
ERROR: Could not capture.

[alikurmus]

I have been getting the same error while trying to capture pictures with gphoto2 and Canon 5d Mark IV: *** Error ***

Canon EOS Full-Press failed (0x2019: PTP Device Busy)

ERROR: Could not capture image.

ERROR: Could not capture.

*** Error (-110: 'I/O in progress') ***

There is an option called mirror lockup. It is usually used to avoid blur when using telephoto lenses because they end up shaking the camera despite tripods. When I disabled the mirror lockup, I stopped getting that error.

My whole process of debugging the error is here: https://wiki.harvard.edu/confluence/display/hufasstubbsgroup/Ali+Kurmus+-+Strobed+Internal+DIMM

It starts under July 26th.