3 """Utilities for dealing with webcam images."""
9 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
49 if is_near(pixel[0], 16) and is_near(pixel[1], 117) and is_near(pixel[2], 196):
50 weird_orange_count += 1
51 elif is_near(pixel[0], 0) and is_near(pixel[1], 0):
53 logger.debug("hszero#=%d, weird_orange=%d", hs_zero_count, weird_orange_count)
54 return SanityCheckImageMetadata(
55 hs_zero_count > (num_pixels * 0.75),
56 weird_orange_count > (num_pixels * 0.75),
60 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
61 def fetch_camera_image_from_video_server(
62 camera_name: str, *, width: int = 256, quality: int = 70
64 """Fetch the raw webcam image from the video server."""
65 camera_name = camera_name.replace(".house", "")
66 camera_name = camera_name.replace(".cabin", "")
68 f"http://10.0.0.226:8080/Umtxxf1uKMBniFblqeQ9KRbb6DDzN4/jpeg/GKlT2FfiSQ/{camera_name}/s.jpg"
70 logger.debug('Fetching image from %s', url)
72 response = requests.get(url, stream=False, timeout=10.0)
74 raw = response.content
75 logger.debug('Read %d byte image from HTTP server', len(response.content))
76 tmp = np.frombuffer(raw, dtype="uint8")
78 'Translated raw content into %s %s with element type %s',
79 tmp.shape, type(tmp), type(tmp[0]),
81 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
83 'Decoded into %s jpeg %s with element type %s',
84 jpg.shape, type(jpg), type(jpg[0][0])
86 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
88 'Converted JPG into %s HSV HSV %s with element type %s',
89 hsv.shape, type(hsv), type(hsv[0][0])
91 (_, is_bad_image) = sanity_check_image(hsv)
94 except Exception as e:
96 msg = f"Got a bad image or HTTP error from {url}; returning None."
98 warnings.warn(msg, stacklevel=2)
102 def camera_name_to_hostname(camera_name: str) -> str:
103 """Map a camera name to a hostname
105 >>> camera_name_to_hostname('driveway')
108 >>> camera_name_to_hostname('cabin_driveway')
113 "driveway": "driveway.house",
114 "backyard": "backyard.house",
115 "frontdoor": "frontdoor.house",
116 "cabin_driveway": "driveway.cabin",
118 camera_name = mapping.get(camera_name, camera_name)
119 if "." not in camera_name:
120 hostname = platform.node()
121 suffix = hostname.split(".")[-1]
122 camera_name += f".{suffix}"
126 @decorator_utils.retry_if_none(tries=2, delay_sec=1, backoff=1.1)
127 def fetch_camera_image_from_rtsp_stream(camera_name: str, *, width: int = 256) -> 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('Fetching image from RTSP stream %s', stream)
137 "/usr/local/bin/ffmpeg",
149 with subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL) as proc:
150 out, _ = proc.communicate(timeout=10)
152 except Exception as e:
154 msg = f"Failed to retrieve image via RTSP {stream}, returning None."
156 warnings.warn(msg, stacklevel=2)
160 @decorator_utils.timeout(seconds=30, use_signals=False)
161 def _fetch_camera_image(camera_name: str, *, width: int = 256, quality: int = 70) -> RawJpgHsv:
162 """Fetch a webcam image given the camera name."""
163 logger.debug("Trying to fetch camera image from video server")
164 raw = fetch_camera_image_from_video_server(camera_name, width=width, quality=quality)
166 logger.debug("Reading from video server failed; trying direct RTSP stream")
167 raw = fetch_camera_image_from_rtsp_stream(camera_name, width=width)
168 if raw is not None and len(raw) > 0:
169 tmp = np.frombuffer(raw, dtype="uint8")
170 jpg = cv2.imdecode(tmp, cv2.IMREAD_COLOR)
171 hsv = cv2.cvtColor(jpg, cv2.COLOR_BGR2HSV)
177 msg = "Failed to retieve image from both video server and direct RTSP stream"
179 warnings.warn(msg, stacklevel=2)
180 return RawJpgHsv(None, None, None)
183 def fetch_camera_image(camera_name: str, *, width: int = 256, quality: int = 70) -> RawJpgHsv:
185 return _fetch_camera_image(camera_name, width=width, quality=quality)
186 except exceptions.TimeoutError:
187 logger.warning('Fetching camera image operation timed out.')
188 return RawJpgHsv(None, None, None)
191 if __name__ == '__main__':