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webstreamer.py
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webstreamer.py
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import io
import picamera
import logging
import socket
import socketserver
from threading import Condition
from http import server
# Code taken from https://picamera.readthedocs.io/en/latest/recipes2.html#web-streaming
PAGE="""\
<html>
<head>
<title>Cat Monitor Camera Setup</title>
</head>
<body>
<h1>Cat Monitor Camera Setup</h1>
<img src="stream.mjpg" width="1280" height="720" />
</body>
</html>
"""
def get_ip():
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.settimeout(0)
try:
# doesn't even have to be reachable
s.connect(('8.8.8.8', 1))
IP = s.getsockname()[0]
except Exception:
IP = '127.0.0.1'
finally:
s.close()
return IP
class StreamingOutput(object):
def __init__(self):
self.frame = None
self.buffer = io.BytesIO()
self.condition = Condition()
def write(self, buf):
if buf.startswith(b'\xff\xd8'):
self.buffer.truncate()
with self.condition:
self.frame = self.buffer.getvalue()
self.condition.notify_all()
self.buffer.seek(0)
return self.buffer.write(buf)
class StreamingHandler(server.BaseHTTPRequestHandler):
output = None
def do_GET(self):
if self.path == '/':
self.send_response(301)
self.send_header('Location', '/index.html')
self.end_headers()
elif self.path == '/index.html':
content = PAGE.encode('utf-8')
self.send_response(200)
self.send_header('Content-Type', 'text/html')
self.send_header('Content-Length', len(content))
self.end_headers()
self.wfile.write(content)
elif self.path == '/stream.mjpg':
self.send_response(200)
self.send_header('Age', 0)
self.send_header('Cache-Control', 'no-cache, private')
self.send_header('Pragma', 'no-cache')
self.send_header('Content-Type', 'multipart/x-mixed-replace; boundary=FRAME')
self.end_headers()
try:
while True:
with StreamingHandler.output.condition:
StreamingHandler.output.condition.wait()
frame = StreamingHandler.output.frame
self.wfile.write(b'--FRAME\r\n')
self.send_header('Content-Type', 'image/jpeg')
self.send_header('Content-Length', len(frame))
self.end_headers()
self.wfile.write(frame)
self.wfile.write(b'\r\n')
except Exception as e:
logging.warning(
'Removed streaming client %s: %s',
self.client_address, str(e))
else:
self.send_error(404)
self.end_headers()
class StreamingServer(socketserver.ThreadingMixIn, server.HTTPServer):
allow_reuse_address = True
daemon_threads = True
def __init__(self, address, handler, output):
handler.output = output
super().__init__(address, handler)
class WebStreamer:
def __init__(self):
output = StreamingOutput()
print('Stream started at http://' + get_ip() + ':8000')
with picamera.PiCamera(resolution='1920x1080', framerate=24) as camera:
camera.start_recording(output, format='mjpeg')
try:
address = ('', 8000)
server = StreamingServer(address, StreamingHandler, output)
server.serve_forever()
finally:
camera.stop_recording()