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#!/usr/bin/env python
# python-gphoto2 - Python interface to libgphoto2
# http://github.com/jim-easterbrook/python-gphoto2
# Copyright (C) 2018-22 Jim Easterbrook jim@jim-easterbrook.me.uk
#
# This file is part of python-gphoto2.
#
# python-gphoto2 is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# python-gphoto2 is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with python-gphoto2. If not, see
# <https://www.gnu.org/licenses/>.
"""Simple time lapse script.
This works OK with my Canon SLR, but will probably need changes to work
with another camera.
"""
from contextlib import contextmanager
import locale
import os
import subprocess
import sys
import time
import gphoto2 as gp
# time between captures
INTERVAL = 10.0
# temporary directory
WORK_DIR = '/tmp/time_lapse'
# result
OUT_FILE = 'time_lapse.mp4'
@contextmanager
def configured_camera():
# initialise camera
camera = gp.Camera()
camera.init()
try:
# adjust camera configuratiuon
cfg = camera.get_config()
capturetarget_cfg = cfg.get_child_by_name('capturetarget')
capturetarget = capturetarget_cfg.get_value()
capturetarget_cfg.set_value('Internal RAM')
# camera dependent - 'imageformat' is 'imagequality' on some
imageformat_cfg = cfg.get_child_by_name('imageformat')
imageformat = imageformat_cfg.get_value()
imageformat_cfg.set_value('Small Fine JPEG')
camera.set_config(cfg)
# use camera
yield camera
finally:
# reset configuration
capturetarget_cfg.set_value(capturetarget)
imageformat_cfg.set_value(imageformat)
camera.set_config(cfg)
# free camera
camera.exit()
def empty_event_queue(camera):
while True:
type_, data = camera.wait_for_event(10)
if type_ == gp.GP_EVENT_TIMEOUT:
return
if type_ == gp.GP_EVENT_FILE_ADDED:
# get a second image if camera is set to raw + jpeg
print('Unexpected new file', data.folder + data.name)
def main():
locale.setlocale(locale.LC_ALL, '')
if not os.path.exists(WORK_DIR):
os.makedirs(WORK_DIR)
template = os.path.join(WORK_DIR, 'frame%04d.jpg')
next_shot = time.time() + 1.0
count = 0
with configured_camera() as camera:
while True:
try:
empty_event_queue(camera)
while True:
sleep = next_shot - time.time()
if sleep < 0.0:
break
time.sleep(sleep)
path = camera.capture(gp.GP_CAPTURE_IMAGE)
print('capture', path.folder + path.name)
camera_file = camera.file_get(
path.folder, path.name, gp.GP_FILE_TYPE_NORMAL)
camera_file.save(template % count)
camera.file_delete(path.folder, path.name)
next_shot += INTERVAL
count += 1
except KeyboardInterrupt:
break
subprocess.check_call(['ffmpeg', '-r', '25',
'-i', template, '-c:v', 'h264', OUT_FILE])
for i in range(count):
os.unlink(template % i)
return 0
if __name__ == "__main__":
sys.exit(main())
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