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Today's Topics:
1. Re: When /where to run v4l2-ctl commands? (Fred Hamilton)
----------------------------------------------------------------------
Message: 1
Date: Tue, 5 Dec 2017 08:37:25 -0800
From: Fred Hamilton <f...@yonkitime.com>
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] When /where to run v4l2-ctl commands?
Message-ID:
<CAJUE6TCFaGzs5SwDDfQH0HCm8CT6Gx=qmjs2ekoosejak-t...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Mon, Nov 27, 2017 at 4:14 PM, MrDaveDev <motionmrdave...@gmail.com>
wrote:
> On 11/25/2017 4:57 AM, Colin Law wrote:
>
>> On 24 November 2017 at 23:37, Fred Hamilton <f...@yonkitime.com> wrote:
>>
>>> I'm using motion (quite successfully - thanks!) to stream my Logitech
>>> C920
>>> webcam. However I want to disable autofocus and fix the focal length
>>> (and
>>> make a few other changes). I can do that after everything is up and
>>> running
>>> from the terminal with v4l2-ctl commands in a script. However when I add
>>> that script to my boot sequence it doesn't seem to work (maybe motion is
>>> launching after the script and overriding my settings?).
>>>
>> It shouldn't make any difference where you run the commands from,
>> motion should not change them.
>> First check that the commands are working. Disable motion and reboot
>> and check that the commands have taken. If not then the issue is with
>> how you are running them from the boot sequence. Possibly a path issue
>> or something. Maybe you have not supplied the full path to something
>> that needs it.
>>
>> Colin
>>
> Well, if the value is one that can be set by Motion, it would change
> them. It is also possible that when Motion sets the resolution or pixel
> format, the camera resets everything to align with it. So when using the
> v4l2-cntl make sure to include the resolution and input format.
>
> MrDave
I haven't had a chance to get back to this yet but wanted to thank everyone
for their suggestions. Motion was installed as a service ("sudo service
motion start"), I guess that's systemd?
I was just thinking that Motion might have incorporated support for
v4l2-ctl in some way. I'm sure I can get a get a script to work one way or
another once I get back to it.
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