Merge pull request #834 from Joseph-DiGiovanni/beta

Add configurable device frame rate

howdy/src/config.ini

@@ -86,6 +86,12 @@ force_mjpeg = false
 # OPENCV only.
 exposure = -1
 
+# Specify frame rate of the capture device.
+# Some IR emitters will not function properly at the default framerate.
+# Use qv4l2 to determine an appropriate value.
+# OPENCV only.
+device_fps = -1
+
 # Rotate captured frames so faces are upright.
 # 0 Check landscape orientation only
 # 1 Check both landscape and portrait orientation

howdy/src/recorders/video_capture.py

@@ -124,6 +124,12 @@ def _create_reader(self):
  self.config.get("video", "device_path"),
  cv2.CAP_V4L
  )
+ # Set the capture frame rate
+ # Without this the first detected (and possibly lower) frame rate is used, -1 seems to select the highest
+ # Use 0 as a fallback to avoid breaking an existing setup, new installs should default to -1
+ self.fps = self.config.getint("video", "device_fps", fallback=0)
+ if self.fps != 0:
+ self.internal.set(cv2.CAP_PROP_FPS, self.fps)
 
  # Force MJPEG decoding if true
  if self.config.getboolean("video", "force_mjpeg", fallback=False):