如何添加时间戳时，视频流Raspberry-Pi Python？
如何添加时间戳时，视频流Raspberry-Pi Python？
提问于 2022-01-07 07:17:00
我想要使用Raspberry-pi的网络视频。我用了Raspberry-pi相机。我想在我的网络流媒体视频中添加时间戳和其他文本。但我的网站流只是显示第一次迭代文本。例如，我在15:00刷新webstream时运行raspberry-pi 07-01-22 14:14，文本再次显示"07-01-22 14:14“。我该怎么办？
我的Python代码：
# Source code from the official PiCamera package
# http://picamera.readthedocs.io/en/latest/recipes2.html#web-streaming
import io
import picamera
import logging
import socketserver
from threading import Condition
from http import server
import datetime
PAGE="""\
<html>
<head>
<title>Camera Security Report</title>
</head>
<body>
<center><h1>Camera Security Report</h1></center>
<center><img src="stream.mjpg" width="640" height="480"></center>
</body>
</html>
"""
def show_time():
''' Show current date time in text format '''
rightNow = datetime.datetime.now()
currentTime = ("%04d-%02d-%02d %02d:%02d:%02d" % (rightNow.year,
rightNow.month,
rightNow.day,
rightNow.hour,
rightNow.minute,
rightNow.second))
return currentTime
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', 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 output.condition:
output.condition.wait()
frame = 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
with picamera.PiCamera(resolution='640x480', framerate=60) as camera:
output = StreamingOutput()
#Uncomment the next line to change your Pi's Camera rotation (in degrees)
#camera.rotation = 90
camera.start_recording(output, format='mjpeg')
camera.annotate_text = show_time()
try:
address = ('', 8000)
server = StreamingServer(address, StreamingHandler)
server.serve_forever()
finally:
camera.stop_recording()```回答 1
Stack Overflow用户
发布于 2022-07-03 16:28:44
在annotate_text ()之前定义start_recording。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/70617764
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