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Enable dynamic exposure framerate for camera input and handle subproc… #132

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Merged
openminddev merged 1 commit into from
Jun 12, 2026
Merged

Enable dynamic exposure framerate for camera input and handle subproc… #132

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26 changes: 26 additions & 0 deletions src/om1_vlm/anonymizationSys/face_recog_stream/camera_reader.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
from __future__ import annotations

import logging
import subprocess
from typing import Optional

import cv2
Expand Down Expand Up @@ -79,6 +80,31 @@ def open_capture(
self.cap.set(cv2.CAP_PROP_BUFFERSIZE, 1)
self.cap.set(cv2.CAP_PROP_AUTO_EXPOSURE, 3)

try:
subprocess.run(
[
"v4l2-ctl",
"-d",
device,
"--set-ctrl=exposure_dynamic_framerate=1",
],
check=True,
capture_output=True,
text=True,
)
logging.info("Enabled exposure_dynamic_framerate on %s", device)
except FileNotFoundError:
logging.warning(
"v4l2-ctl not found; install v4l-utils to enable "
"exposure_dynamic_framerate"
)
except subprocess.CalledProcessError as e:
logging.warning(
"Failed to set exposure_dynamic_framerate on %s: %s",
device,
(e.stderr or e.stdout or "").strip(),
)

if not self.cap or not self.cap.isOpened():
raise RuntimeError(f"Failed to open camera device {device}")

Expand Down
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