motioneye-project/motioneye

motioneye not applying v4l2 config settings

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#2,300 opened on Feb 26, 2022

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Description

I was trying to adjust the exposure settings for the camera I am using.

when doing

v4l2-ctl -c exposure_auto=1 (for manual mode)
v4l2-ctl -c exposure_absolute=20

the picture looks perfectly fine. but when i try to set the same setting in the "Video Device" menu in motioneye is simply doesn't change anything.

After changing the setting in the webinterface v4l2-ctl -L does not reflect the changes which i assume it should if they were applied correctly, right?

The other settings also seem to be kinda buggy. sometimes they apply, sometimes they don't and I can't really see a pattern here. Anyone one have any idea what is wrong here?

Contributor guide

Research direction
Investigate how motioneye applies v4l2 settings via the web interface, trace the code path from settings change to actual v4l2 ctl execution, and check for race conditions or incorrect arguments.
Tech stack
python
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
PythonLinuxv4l2
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60