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main.py
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main.py
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#!/usr/bin/env python3
#
# Serving live images from Raspberry Pi Camera
#
# Based on source code from the official PiCamera package
# http://picamera.readthedocs.io/en/latest/recipes2.html#web-streaming
#
from http import server
from threading import Condition
import io
import picamera # type: ignore
import socketserver
IMG_WIDTH = 640
IMG_HEIGHT = 480
PORT = 8000
PAGE = f"""\
<html>
<head>
<title>Raspberry Pi - Surveillance Camera</title>
</head>
<body>
<center>
<h1>Raspberry Pi - Camera</h1>
</center>
<center>
<img src="/image.jpeg" width="{IMG_WIDTH}" height="{IMG_HEIGHT}">
</center>
</body>
</html>
"""
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"):
# New frame, copy the existing buffer"s content and notify all
# clients it"s available
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):
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", str(len(content)))
self.end_headers()
self.wfile.write(content)
elif self.path == "/image.jpeg":
self.send_response(200)
self.send_header("Age", str(0))
self.send_header("Cache-Control", "no-cache, private")
self.send_header("Pragma", "no-cache")
self.send_header("Content-Type", "image/jpeg")
with output.condition:
output.condition.wait()
frame = output.frame
self.send_header("Content-Length", str(len(frame))) # type: ignore
self.end_headers()
self.wfile.write(frame) # type: ignore
self.wfile.write(b"\r\n")
return
else:
self.send_error(404)
self.end_headers()
class StreamingServer(socketserver.ThreadingMixIn, server.HTTPServer):
allow_reuse_address = True
daemon_threads = True
with picamera.PiCamera(resolution=f"{IMG_WIDTH}x{IMG_HEIGHT}", framerate=10) as camera:
output = StreamingOutput()
camera.start_recording(output, format="mjpeg")
try:
address = ("", PORT)
server = StreamingServer(address, StreamingHandler)
server.serve_forever()
finally:
camera.stop_recording()