allow mask to be base64 encoded into the config file

config/config.example.yml

@@ -126,7 +126,9 @@ cameras:
  # width: 720
 
  ################
- ## Optional mask. Must be the same aspect ratio as your video feed.
+ ## Optional mask. Must be the same aspect ratio as your video feed. Value is either the
+ ## name of a file in the config directory or a base64 encoded bmp image prefixed with
+ ## 'base64,' eg. 'base64,asfasdfasdf....'.
  ## 
  ## The mask works by looking at the bottom center of the bounding box for the detected
  ## person in the image. If that pixel in the mask is a black pixel, it ignores it as a

frigate/video.py

@@ -12,6 +12,7 @@
 import copy
 import itertools
 import json
+import base64
 from collections import defaultdict
 from frigate.util import draw_box_with_label, area, calculate_region, clipped, intersection_over_union, intersection, EventsPerSecond, listen, PlasmaManager
 from frigate.objects import ObjectTracker
@@ -189,7 +190,12 @@ def track_camera(name, config, global_objects_config, frame_queue, frame_shape,
 
  # load in the mask for object detection
  if 'mask' in config:
- mask = cv2.imread("/config/{}".format(config['mask']), cv2.IMREAD_GRAYSCALE)
+ if config['mask'].startswith('base64,'):
+ img = base64.b64decode(config['mask'][7:]) 
+ npimg = np.fromstring(img, dtype=np.uint8)
+ mask = cv2.imdecode(npimg, cv2.IMREAD_GRAYSCALE)
+ else:
+ mask = cv2.imread("/config/{}".format(config['mask']), cv2.IMREAD_GRAYSCALE)
  else:
  mask = None