Re: gphoto 2.5.4/2.5.10/2.5.11 works unreliable on RP3 with Canon 1200D

Hi again!

Have to apologise. Total looser, so bad!

Looks like the problem isn't gphoto at all, but the way I called it from
python.

I am still investigating, but it seems like it matters if you call
gphoto from the python subprocess-lib with "shell=True" or "shell=False"
parameter.

Here is the python code fragment that works:

*config.py:*

# Grace time for camera to finish operation. Grace_time must be lower
the interval_time.
# Wartezeit für Kamera bevor das Bild runtergeladen wrid. Muss kleiner
als Schlafzeit sein.
grace_time = 25

# camera name for generation of unique output files
camera_name = 'cam_01'

# folder for capture files
capture_file_folder = '../../capture/'

# gphoto2 executable
gphoto_executable='/usr/bin/gphoto2'

# filename_format

FILENAME_FORMAT = "Schedule_%Y%m%d-%H%M%S.jpg"

# ===================
# Image configuration
# ===================

# Aperture
# Blende

image_conf = {
    'main/capturesettings/aperture' : '8',  # Blende
    'main/imagesettings/iso' :'0',       # iso Value. 0=Auto
}

*capture.py:*

import subprocess
import datetime
import os

import config
from log import logger
from translation import _

def start():

...
...

   CMD_SINGLE = [
           '--force-overwrite',
           '--filename=%s' % out_file_name,
           '--wait-event=270ms',
           '--set-config', "eosremoterelease='Press 1'",
           '--wait-event=80ms',
           '--set-config', "eosremoterelease='Press 2'",
           '--wait-event=80ms',
           '--set-config', "eosremoterelease='Release 2'",
           '--wait-event=80ms',
           '--set-config', "eosremoterelease='Release 1'",
           '--wait-event-and-download=%ss' % config.grace_time,
           ]

    cmd = [config.gphoto_executable]

    cmd = cmd + CMD_SINGLE

    logger.info(_('Running') + ": " + ' '.join(cmd)  )

    output = subprocess.check_output( ' '.join(cmd), *shell=True* )

    logger.info(_('Got') )

    for line in output.decode("utf-8", "replace").split('\n'):
        logger.info(_('    ') + line )

    logger.info(_('Image captured')  )

Currently I have a series of 28 shots without problems.

Sorry for stealing your time

Volker

-- 
=========================================================
   inqbus Scientific Computing    Dr.  Volker Jaenisch
   Richard-Strauss-Straße 1       +49(08861) 690 474 0
   86956 Schongau-West            http://www.inqbus.de
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