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Today's Topics:
1. Re: motion detection (Dougie Nisbet)
2. /dev/video[01] file keeps flipping [WAS Re: unable to start
motion after it worked for many weeks] (Dougie Nisbet)
3. Re: /dev/video[01] file keeps flipping [WAS Re: unable to
start motion after it worked for many weeks] (Colin Law)
4. Re: motion detection (Scott Holmes)
----------------------------------------------------------------------
Message: 1
Date: Mon, 1 Oct 2018 15:35:32 +0100
From: Dougie Nisbet <[email protected]>
To: [email protected]
Subject: Re: [Motion-user] motion detection
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
On 01/10/2018 08:31, Scott Holmes via Motion-user wrote:
> then it queries the Motion MySQL database to find the image in that event
> with the largest number of changed pixels.
At the risk of going off-thread, is this what
??? output_pictures best
does?
Dougie
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Message: 2
Date: Mon, 1 Oct 2018 15:41:06 +0100
From: Dougie Nisbet <[email protected]>
To: [email protected]
Subject: [Motion-user] /dev/video[01] file keeps flipping [WAS Re:
unable to start motion after it worked for many weeks]
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
On 30/05/2018 06:00, MrDave wrote:
>
> Motion works off of device names and those are assigned from the
> kernel and can change whenever the computer is rebooted.? In the mail
> archives from years ago I seem to recall someone indicating how to set
> up udev rules so that a particular camera is always assigned to a
> specific device number (e.g. /dev/video0 would always be the laptop
> cam and? /dev/video1 would be an external web cam etc)? Without those
> rules which are set up outside of motion, the camera that is assigned
> to a particular device can and will change if there is more than one.?
> One option of course is to just set up an additional thread (as it was
> called in that old version) for each camera and just monitor both cameras.
>
> MrDave
>
Sorry to revive this from May, but I've discovered this might be the
reason I keep losing one of my cameras. It's a simple Logitech USB
camera. The only camera on the PC. Single motion.conf file. But now,
almost daily, for some reason, the video device file keeps changing.
/dev/video0 disappears and the camera appears on /dev/video1.
But the strange bit is, this happens *when the machine is up*.
I'm trying to track down what might be happening when this occurs. e.g.
Same time each day, processes running etc. But in the meantime, if
anyone has any ideas, I'm all ears.
Thanks
Dougie
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Message: 3
Date: Mon, 1 Oct 2018 20:43:41 +0100
From: Colin Law <[email protected]>
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] /dev/video[01] file keeps flipping [WAS Re:
unable to start motion after it worked for many weeks]
Message-ID:
<CAL=0gLvhsx_yn=wNz_tBUNoRW+QmH9aZfbUeP5Ui-dzL9L=7...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Mon, 1 Oct 2018 at 15:41, Dougie Nisbet <[email protected]> wrote:
> On 30/05/2018 06:00, MrDave wrote:
>
> Motion works off of device names and those are assigned from the kernel
> and can change whenever the computer is rebooted. In the mail archives
> from years ago I seem to recall someone indicating how to set up udev rules
> so that a particular camera is always assigned to a specific device number
> (e.g. /dev/video0 would always be the laptop cam and /dev/video1 would be
> an external web cam etc) Without those rules which are set up outside of
> motion, the camera that is assigned to a particular device can and will
> change if there is more than one. One option of course is to just set up
> an additional thread (as it was called in that old version) for each camera
> and just monitor both cameras.
>
> MrDave
>
> Sorry to revive this from May, but I've discovered this might be the
> reason I keep losing one of my cameras. It's a simple Logitech USB camera.
> The only camera on the PC. Single motion.conf file. But now, almost daily,
> for some reason, the video device file keeps changing. /dev/video0
> disappears and the camera appears on /dev/video1.
>
> But the strange bit is, this happens *when the machine is up*.
>
> I'm trying to track down what might be happening when this occurs. e.g.
> Same time each day, processes running etc. But in the meantime, if anyone
> has any ideas, I'm all ears.
>
Look in syslog to see if any clues, I suspect you may see that the usb
device is disconnected then reconnects. If so try it in a different USB
socket with different cable if possible. A workaround may be to use a udev
rule to force it to a consistent device.
Colin
> Thanks
>
> Dougie
> _______________________________________________
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>
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Message: 4
Date: Tue, 2 Oct 2018 05:27:57 +0000 (UTC)
From: Scott Holmes <[email protected]>
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] motion detection
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
I've never used output_pictures_best.
I use the "%D changed pixels" conversion specifier to insert the number of
changed pixels in each image into the database.? It's then pretty easy to
retrieve the image with most changed pixels and email it.
------------------------------------------- Scott Holmes, [email protected]
-------------------------------------------
On Tuesday, 2 October 2018, 12:37:04 am AEST, Dougie Nisbet
<[email protected]> wrote:
At the risk of going off-thread, is this what
??? output_pictures best
does?
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