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),
60 weird_orange_count > (num_pixels * 0.75),
64 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
65 def fetch_camera_image_from_video_server(
66 camera_name: str, *, width: int = 256, quality: int = 70
68 """Fetch the raw webcam image from the video server."""
69 camera_name = camera_name.replace(".house", "")
70 camera_name = camera_name.replace(".cabin", "")
71 url = f"http://10.0.0.226:8080/Umtxxf1uKMBniFblqeQ9KRbb6DDzN4/jpeg/GKlT2FfiSQ/{camera_name}/s.jpg"
72 logger.debug(f'Fetching image from {url}')
74 response = requests.get(url, stream=False, timeout=10.0)
76 raw = response.content
78 f'Read {len(response.content)} byte image from HTTP server'
80 tmp = np.frombuffer(raw, dtype="uint8")
82 f'Translated raw content into {tmp.shape} {type(tmp)} with element type {type(tmp[0])}.'
84 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
86 f'Decoded into {jpg.shape} jpeg {type(jpg)} with element type {type(jpg[0][0])}'
88 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
90 f'Converted JPG into HSV {hsv.shape} HSV {type(hsv)} with element type {type(hsv[0][0])}'
92 (_, is_bad_image) = sanity_check_image(hsv)
95 except Exception as e:
97 msg = f"Got a bad image or HTTP error from {url}; returning None."
99 warnings.warn(msg, stacklevel=2)
103 def camera_name_to_hostname(camera_name: str) -> str:
104 """Map a camera name to a hostname
106 >>> camera_name_to_hostname('driveway')
109 >>> camera_name_to_hostname('cabin_driveway')
114 "driveway": "driveway.house",
115 "backyard": "backyard.house",
116 "frontdoor": "frontdoor.house",
117 "cabin_driveway": "driveway.cabin",
119 camera_name = mapping.get(camera_name, camera_name)
120 if "." not in camera_name:
121 hostname = platform.node()
122 suffix = hostname.split(".")[-1]
123 camera_name += f".{suffix}"
127 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
128 def fetch_camera_image_from_rtsp_stream(
129 camera_name: str, *, width: int = 256
130 ) -> Optional[bytes]:
131 """Fetch the raw webcam image straight from the webcam's RTSP stream."""
132 hostname = camera_name_to_hostname(camera_name)
133 stream = f"rtsp://camera:IaLaIok@{hostname}:554/live"
134 logger.debug(f'Fetching image from RTSP stream {stream}')
140 "/usr/local/bin/ffmpeg",
152 with subprocess.Popen(
153 cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL
155 out, _ = proc.communicate(timeout=10)
157 except Exception as e:
159 msg = f"Failed to retrieve image via RTSP {stream}, returning None."
161 warnings.warn(msg, stacklevel=2)
165 @decorator_utils.timeout(seconds=30, use_signals=False)
166 def _fetch_camera_image(
167 camera_name: str, *, width: int = 256, quality: int = 70
169 """Fetch a webcam image given the camera name."""
170 logger.debug("Trying to fetch camera image from video server")
171 raw = fetch_camera_image_from_video_server(
172 camera_name, width=width, quality=quality
176 "Reading from video server failed; trying direct RTSP stream"
178 raw = fetch_camera_image_from_rtsp_stream(camera_name, width=width)
179 if raw is not None and len(raw) > 0:
180 tmp = np.frombuffer(raw, dtype="uint8")
181 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
182 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
189 "Failed to retieve image from both video server and direct RTSP stream"
192 warnings.warn(msg, stacklevel=2)
193 return RawJpgHsv(None, None, None)
196 def fetch_camera_image(
197 camera_name: str, *, width: int = 256, quality: int = 70
200 return _fetch_camera_image(camera_name, width=width, quality=quality)
201 except exceptions.TimeoutError:
202 logger.warning('Fetching camera image operation timed out.')
203 return RawJpgHsv(None, None, None)
206 if __name__ == '__main__':