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#!/bin/env python3
import argparse
import logging
import sys
import signal
import subprocess
import datetime
import os.path
import time
import urllib.request, urllib.parse
from goprocam import GoProCamera, constants
# setup logging facilities
logging.basicConfig(level=logging.INFO)
def setup_cam(dev='gp0'):
logging.info(f"Connecting to gopro camera at {dev}")
return GoProCamera.GoPro(ip_address=GoProCamera.GoPro.getWebcamIP(dev),
mac_address='0e:7c:80:b5:82:0e',
camera=constants.gpcontrol,
webcam_device=dev)
def configure_cam(gp,
resolution="720p",
fps="60",
fov="0",
autooff=constants.Setup.AutoOff.Never):
gp.video_settings(resolution, fps)
gp.gpControlSet(constants.Setup.AUTO_OFF, autooff)
def take_photo(gp, outdir='.'):
logging.info('Snapping picture!')
mediauri = gp.take_photo()
medianame = os.path.basename(urllib.parse.urlparse(mediauri).path)
outpath = os.path.join(outdir, medianame)
logging.info(f"Saving to {outpath}")
urllib.request.urlretrieve(mediauri, filename=outpath)
def webcam(gp,
resolution=constants.Webcam.Resolution.R720p,
fov=constants.Webcam.FOV.Wide):
# prepare v4l2 device
logging.info('Creating v4l2 device node')
v4l2p = subprocess.run([
'doas -n modprobe v4l2loopback && doas -n v4l2loopback-ctl add -n GoPro -x 1 || true'
],
shell=True,
check=True,
capture_output=True)
vnode = v4l2p.stdout.decode('utf-8').strip()
logging.info(f'Starting webcam mode ({vnode})')
gp.webcamFOV(fov=fov)
gp.startWebcam(resolution=resolution)
try:
# gracefull handle sigterm
def sigterm_handler(sig, frame):
raise SystemExit('SIGTERM')
signal.signal(signal.SIGTERM, sigterm_handler)
# pipe video from camera to v4l2 device
udp_stream = f"udp://{gp.getWebcamIP()}:8554"
ffmpeg_args = [
f"ffmpeg -hide_banner -loglevel warning -vsync 2 -fflags nobuffer -flags low_delay -probesize 3072 -nostdin -i {udp_stream} -ar 44100 -f v4l2 -vcodec rawvideo -pix_fmt yuv420p {vnode}"
]
logging.info('Running ffmpeg')
subprocess.run(ffmpeg_args, shell=True, check=True)
except (KeyboardInterrupt, SystemExit, Exception):
# allow camera to shut down
time.sleep(1)
# stop webcam mode
logging.info('Stopping webcam mode')
gp.stopWebcam()
subprocess.run([f"doas -n v4l2loopback-ctl del {vnode}"],
shell=True,
check=True)
# done
logging.info('Exiting...')
parser = argparse.ArgumentParser(description='gopro cli utility')
parser.add_argument('-o',
'--output-directory',
type=str,
default=['.'],
help='Directory to save files to.')
parser.add_argument('-r',
'--resolution',
nargs=1,
type=str,
choices=('1080p', '720p', '420p'),
default='1080p',
help='Video resolution')
# parser.add_argument('-f',
# '--fps',
# type=str,
# default=['60'],
# help='Video frame rate')
parser.add_argument('-v',
'--fov',
type=str,
choices=('wide', 'linear', 'narrow'),
default=['wide'],
help='Video field of view')
group = parser.add_mutually_exclusive_group()
group.add_argument('--take-photo',
action='store_true',
help='Take a photo and save it to OUTPUT.')
group.add_argument('--webcam',
action='store_true',
help='Start webcam mode and register as v4l2 device')
args = parser.parse_args()
res = constants.Webcam.Resolution.R720p
if args.resolution:
if args.resolution == '1080p':
res = constants.Webcam.Resolution.R1080p
elif args.resolution == '720p':
res = constants.Webcam.Resolution.R720p
elif args.resolution == '480p':
res = constants.Webcam.Resolution.R480p
fov = constants.Webcam.FOV.Wide
if args.fov:
if args.fov == 'wide':
fov = constants.Webcam.FOV.Wide
elif args.fov == 'linear':
fov = constants.Webcam.FOV.Linear
elif args.fov == 'narrow':
fov = constants.Webcam.FOV.Narrow
# get camera network device from environment
# should be up and connected (with an ip address assigned)
gp = setup_cam(os.getenv('GOPRO_DEVICE', 'gp0'))
# configure_cam(gp, resolution=args.resolution, fps=args.fps, fov=args.fov)
try:
if args.take_photo:
take_photo(gp, outdir=args.output_directory[0])
if args.webcam:
webcam(gp, resolution=res, fov=fov)
except Exception as err:
logging.error(f"error: {err}")
exit(1)
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