# \#webcam

**URL:** https://forum.opencv.org/tag/webcam/180.md

[Latest](https://forum.opencv.org/latest.md) · [Categories](https://forum.opencv.org/categories.md) · [Tags](https://forum.opencv.org/tags.md)

---

## [Qr detector Opencv.js Polylines from points](https://forum.opencv.org/t/qr-detector-opencv-js-polylines-from-points/17270)

<div class="topic-metadata">

**Author:** [@Rc1025](https://forum.opencv.org/u/Rc1025)\
**Replies:** 1\
**Last updated:** [April 13, 2024, 7:59pm UTC](https://forum.opencv.org/t/qr-detector-opencv-js-polylines-from-points/17270 "2024-04-13T19:59:06Z")

</div>

I’m trying to replicate some code from rust/python-bindings to html with js however the points (cv.Mat) seems to be different than the what is returned in these other bindings. For example: Python import cv2 cap = cv2.…

---

## [Video Capture from webcam only works when debugging](https://forum.opencv.org/t/video-capture-from-webcam-only-works-when-debugging/12171)

<div class="topic-metadata">

**Author:** [@birdistheword96](https://forum.opencv.org/u/birdistheword96)\
**Replies:** 3\
**Last updated:** [March 1, 2023, 9:39am UTC](https://forum.opencv.org/t/video-capture-from-webcam-only-works-when-debugging/12171 "2023-03-01T09:39:55Z")

</div>

SYSTEM AND INSTALL INFORMATION System Information OpenCV Version 4.7.0 Operating System: Windows 10.0.17763 (Pro - Version 21H2) CMake: 3.24.2 Python Version: 3.8.6 OpenCV version Installed from pip (but also built from…

---

## [Connecting Sony A7 III as webcam](https://forum.opencv.org/t/connecting-sony-a7-iii-as-webcam/9706)

<div class="topic-metadata">

**Author:** [@resonatevision](https://forum.opencv.org/u/resonatevision)\
**Replies:** 1\
**Last updated:** [August 1, 2022, 7:51am UTC](https://forum.opencv.org/t/connecting-sony-a7-iii-as-webcam/9706 "2022-08-01T07:51:55Z")

</div>

I am using Sony’s Imaging Edge to connect my mirrorless Sony A7 III to my Mac. It all works nicely and I can see it presented as a webcam on apps like Zoom. The problem arises when I try to read frames using this webcam …

---

## [How do we use python OpenCV Track Bar in Django or HTML web app](https://forum.opencv.org/t/how-do-we-use-python-opencv-track-bar-in-django-or-html-web-app/4129)

<div class="topic-metadata">

**Author:** [@Vkash\_Poudel](https://forum.opencv.org/u/Vkash_Poudel)\
**Replies:** 4\
**Last updated:** [July 2, 2021, 8:43am UTC](https://forum.opencv.org/t/how-do-we-use-python-opencv-track-bar-in-django-or-html-web-app/4129 "2021-07-02T08:43:09Z")

</div>

Please help me find solution, I am creating image processing project where user can choose level for their image processing using track bar in qeb application . Please help me out finding solutions