3 """Utilities for dealing with webcam images."""
8 from typing import NamedTuple, Optional
11 import cv2 # type: ignore
15 import decorator_utils
18 logger = logging.getLogger(__name__)
21 class RawJpgHsv(NamedTuple):
22 """Raw image bytes, the jpeg image and the HSV (hue saturation value) image."""
25 jpg: Optional[np.ndarray]
26 hsv: Optional[np.ndarray]
29 class SanityCheckImageMetadata(NamedTuple):
30 """Is a Blue Iris image bad (big grey borders around it) or infrared?"""
33 is_infrared_image: bool
36 def sanity_check_image(hsv: np.ndarray) -> SanityCheckImageMetadata:
37 """See if a Blue Iris or Shinobi image is bad and infrared."""
39 def is_near(a, b) -> bool:
42 rows, cols, _ = hsv.shape
43 num_pixels = rows * cols
44 weird_orange_count = 0
51 and is_near(pixel[1], 117)
52 and is_near(pixel[2], 196)
54 weird_orange_count += 1
55 elif is_near(pixel[0], 0) and is_near(pixel[1], 0):
57 logger.debug(f"hszero#={hs_zero_count}, weird_orange={weird_orange_count}")
58 return SanityCheckImageMetadata(
59 hs_zero_count > (num_pixels * 0.75), weird_orange_count > (num_pixels * 0.75)
63 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
64 def fetch_camera_image_from_video_server(
65 camera_name: str, *, width: int = 256, quality: int = 70
67 """Fetch the raw webcam image from the video server."""
68 camera_name = camera_name.replace(".house", "")
69 camera_name = camera_name.replace(".cabin", "")
70 url = f"http://10.0.0.226:8080/Umtxxf1uKMBniFblqeQ9KRbb6DDzN4/jpeg/GKlT2FfiSQ/{camera_name}/s.jpg"
71 logger.debug(f'Fetching image from {url}')
73 response = requests.get(url, stream=False, timeout=10.0)
75 raw = response.content
76 logger.debug(f'Read {len(response.content)} byte image from HTTP server')
77 tmp = np.frombuffer(raw, dtype="uint8")
79 f'Translated raw content into {tmp.shape} {type(tmp)} with element type {type(tmp[0])}.'
81 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
83 f'Decoded into {jpg.shape} jpeg {type(jpg)} with element type {type(jpg[0][0])}'
85 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
87 f'Converted JPG into HSV {hsv.shape} HSV {type(hsv)} with element type {type(hsv[0][0])}'
89 (_, is_bad_image) = sanity_check_image(hsv)
92 except Exception as e:
94 msg = f"Got a bad image or HTTP error from {url}; returning None."
96 warnings.warn(msg, stacklevel=2)
100 def camera_name_to_hostname(camera_name: str) -> str:
101 """Map a camera name to a hostname
103 >>> camera_name_to_hostname('driveway')
106 >>> camera_name_to_hostname('cabin_driveway')
111 "driveway": "driveway.house",
112 "backyard": "backyard.house",
113 "frontdoor": "frontdoor.house",
114 "cabin_driveway": "driveway.cabin",
116 camera_name = mapping.get(camera_name, camera_name)
117 if "." not in camera_name:
118 hostname = platform.node()
119 suffix = hostname.split(".")[-1]
120 camera_name += f".{suffix}"
124 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
125 def fetch_camera_image_from_rtsp_stream(
126 camera_name: str, *, width: int = 256
127 ) -> Optional[bytes]:
128 """Fetch the raw webcam image straight from the webcam's RTSP stream."""
129 hostname = camera_name_to_hostname(camera_name)
130 stream = f"rtsp://camera:IaLaIok@{hostname}:554/live"
131 logger.debug(f'Fetching image from RTSP stream {stream}')
137 "/usr/local/bin/ffmpeg",
149 with subprocess.Popen(
150 cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL
152 out, _ = proc.communicate(timeout=10)
154 except Exception as e:
156 msg = f"Failed to retrieve image via RTSP {stream}, returning None."
158 warnings.warn(msg, stacklevel=2)
162 @decorator_utils.timeout(seconds=30, use_signals=False)
163 def _fetch_camera_image(
164 camera_name: str, *, width: int = 256, quality: int = 70
166 """Fetch a webcam image given the camera name."""
167 logger.debug("Trying to fetch camera image from video server")
168 raw = fetch_camera_image_from_video_server(
169 camera_name, width=width, quality=quality
172 logger.debug("Reading from video server failed; trying direct RTSP stream")
173 raw = fetch_camera_image_from_rtsp_stream(camera_name, width=width)
174 if raw is not None and len(raw) > 0:
175 tmp = np.frombuffer(raw, dtype="uint8")
176 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
177 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
183 msg = "Failed to retieve image from both video server and direct RTSP stream"
185 warnings.warn(msg, stacklevel=2)
186 return RawJpgHsv(None, None, None)
189 def fetch_camera_image(
190 camera_name: str, *, width: int = 256, quality: int = 70
193 return _fetch_camera_image(camera_name, width=width, quality=quality)
194 except exceptions.TimeoutError:
195 logger.warning('Fetching camera image operation timed out.')
196 return RawJpgHsv(None, None, None)
199 if __name__ == '__main__':