68 lines
1.8 KiB
Python
68 lines
1.8 KiB
Python
import sys
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import asyncio
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from microdot import Microdot
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app = Microdot()
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frames = []
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for file in ['1.jpg', '2.jpg', '3.jpg']:
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with open(file, 'rb') as f:
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frames.append(f.read())
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@app.route('/')
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async def index(request):
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return '''<!doctype html>
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<html>
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<head>
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<title>Microdot Video Streaming</title>
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<meta charset="UTF-8">
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</head>
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<body>
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<h1>Microdot Video Streaming</h1>
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<img src="/video_feed">
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</body>
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</html>''', 200, {'Content-Type': 'text/html'}
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@app.route('/video_feed')
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async def video_feed(request):
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print('Starting video stream.')
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if sys.implementation.name != 'micropython':
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# CPython supports async generator function
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async def stream():
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try:
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yield b'--frame\r\n'
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while True:
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for frame in frames:
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yield b'Content-Type: image/jpeg\r\n\r\n' + frame + \
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b'\r\n--frame\r\n'
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await asyncio.sleep(1)
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except GeneratorExit:
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print('Stopping video stream.')
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else:
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# MicroPython can only use class-based async generators
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class stream():
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def __init__(self):
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self.i = 0
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def __aiter__(self):
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return self
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async def __anext__(self):
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await asyncio.sleep(1)
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self.i = (self.i + 1) % len(frames)
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return b'Content-Type: image/jpeg\r\n\r\n' + \
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frames[self.i] + b'\r\n--frame\r\n'
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async def aclose(self):
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print('Stopping video stream.')
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return stream(), 200, {'Content-Type':
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'multipart/x-mixed-replace; boundary=frame'}
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if __name__ == '__main__':
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app.run(debug=True)
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