import cv2
import numpy as np
import gphoto2 as gp
from flask import Flask, Response

app = Flask(__name__)

camera = gp.Camera()
camera.init()

def generate():
    while True:
        file = camera.capture_preview()
        data = file.get_data_and_size()
        frame = np.frombuffer(data, dtype=np.uint8)
        frame = cv2.imdecode(frame, cv2.IMREAD_COLOR)

        if frame is not None:
            _, buffer = cv2.imencode('.jpg', frame)
            yield (b'--frame\r\n'
                   b'Content-Type: image/jpeg\r\n\r\n' + buffer.tobytes() + b'\r\n')

@app.route('/liveview')
def liveview():
    return Response(generate(),
                    mimetype='multipart/x-mixed-replace; boundary=frame')

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5000)