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#!/bin/env python3.8
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,
outdir='.',
resolution=constants.Webcam.Resolution.R720p,
fov=constants.Webcam.FOV.Wide):
# prepare v4l2 device
if not os.path.exists('/dev/video9'):
logging.info('Creating v4l2 device node at /dev/video9')
subprocess.run([
'doas -n modprobe v4l2loopback video_nr=9 card_label=GoPro9 exclusive_caps=1'
],
shell=True,
check=True)
logging.info('Starting webcam mode')
gp.webcamFOV(fov)
gp.startWebcam(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 -probesize 3072 -fflags nobuffer -flags low_delay -i {udp_stream} -vsync 2 -ar 44100 -vcodec rawvideo -pix_fmt yuv420p -f v4l2 /dev/video9"
]
logging.info('Running ffmpeg')
# [
# 'ffmpeg -hide_banner -loglevel warning -probesize 5000 -analyzeduration 22000 -r 30 -i udp://@:8554 -an -vcodec rawvideo -pix_fmt yuv420p -r 30 -s 1280x720 -flush_packets 1 -f v4l2 /dev/video9'
# ]
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()
# done
logging.info('Exiting...')
parser = argparse.ArgumentParser(description='gopro cli utility')
parser.add_argument('-o',
'--output',
nargs=1,
type=str,
metavar='OUTPUT',
default='.',
help='Directory to save files to.')
parser.add_argument('-r',
'--resolution',
nargs=1,
type=str,
metavar='RES',
choices=('1080', '720', '420'),
default='1080p',
help='Video resolution')
parser.add_argument('-f',
'--fps',
nargs=1,
type=str,
metavar='FPS',
default='60',
help='Video frame rate')
parser.add_argument('-v',
'--fov',
nargs=1,
type=str,
metavar='FOV',
choices=('wide', 'linear', 'narrow'),
default='wide',
help='Video field of view')
parser.add_argument('--take-photo',
action='store_true',
help='Take a photo and save it to OUTPUT.')
parser.add_argument('--webcam',
action='store_true',
help='Start webcam mode and register as v4l2 device')
args = parser.parse_args()
# 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, args.output)
if args.webcam:
webcam(gp)
except Exception as err:
logging.error(f"error: {err}")
exit(1)
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