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Today's Topics:
1. Re: Gray glitching but only one of of two identical cameras
(Barry Martin)
2. Re: Gray glitching but only one of of two identical cameras
(Roger Heflin)
----------------------------------------------------------------------
Message: 1
Date: Mon, 24 May 2021 09:16:26 -0500
From: Barry Martin <barry3mar...@gmail.com>
To: motion-user@lists.sourceforge.net
Subject: Re: [Motion-user] Gray glitching but only one of of two
identical cameras
Message-ID: <61ac8b15-662a-2b0f-9a7e-2291f4bc7...@gmail.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Hi Roger!
On 5/23/21 7:21 PM, Roger Heflin wrote:
> Are these cams pointing out the window, and if so, is the camera in
> full sunlight??? Are some of the cams hotter than the others??? A lot
> of the issues with electronics I have seen is less that good testing
> across the operational temperature ran and so the device gets a bit
> too hot and act badly. ? I have seen ethernet chipsets randomly lose
> link and reconnect, and heat sinks and/or a fan fixed it. ? So if it
> is getting a bit too hot it could act up in just about any way. So are
> the cameras that act up warmer (or in full sun), and what is your
> elevation?? (5000 ft elevation air is about 80%? as good at cooling,
> so a marginal cooling design will be much worse there), and often no
> one really does decent testing around temperature.
Actually I had the heat consideration yesterday after swapping in the
?updated? RPi SD Card ? the one using Motion 4.3.2. Used a non-contact
detector from about 12? ( 4m) away and 91?F (33?C) late afternoon ? Sun
not hitting the window; measured just now (8:30 a.m.) and 85?F (29?C)
?currently overcast and so not ?glaringly bright?. Minor occasional
glitches (I?ll accept those!). (Another camera on a different Pi looks
at a white vinyl-sided house and never a glitch.)
The window (and so cameras) face East, so the heat and Sun could be
suspect.
The cameras are SV-USBFHD06H-BL36, which appear to be the equivalent of
ELP-USBFHD06H-BL36. (I?ve forgotten how I made this conclusion.) The ELP
specifications list: Working temperature
-10?70? (storage -20?85?) ? so 14-158?F.
Elevation shouldn?t be an issue, though we have joked about about
climbing up here to the second floor. :) Google lists the city as 571? ?
so nowhere near the approximately mile you suggested.
You asked about if some of the cameras are hotter than others. There are
two SV (the brand) cameras cameras in the window ? about a foot apart
and should be ?twins? as same model and purchased together. Both have
glitch issues, just one much more than the other. Currently ?Camera 1?
is occasionally glitching while ?Camera 2? is not; yesterday afternoon
and evening Camera 2 was glitching like mad. No overnight boot/resets.
The only change I can think of is the date
Thanks for the suggestions!
Barry
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Message: 2
Date: Mon, 24 May 2021 11:02:21 -0500
From: Roger Heflin <roger.hef...@gmail.com>
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Gray glitching but only one of of two
identical cameras
Message-ID:
<caamcdeezczhwz2vnq3n3rjutf14jbngt9bytxjvfsi6afih...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Heat can affect 2 "identical" chips differently. variations in the design
can mean one is less or more sensitive to heat, or can make one generate
more internal heat and make it a bit hotter that the other device.
So the non-contact at 12' would have measured the temp on a largish area,
so the general temp of the window area. You might (if you can) get it
closer measure on one cam vs the other, assuming the camera is black it
would be likely to heat up more. How wide of area it measures depends on
what the ratio of the non-contact device is. Cheaper devices will be 6:1
(at 12' it would measure an average on a 2' spot), and better devices can
be higher ratios but will still likely be measuring 12" area at 12'.
If you can put a fan blowing in the direction of the device that might
prove or disprove heat. Coating the part of the device facing the heat
with something white or reflective might reduce the heat from the sun it
gets, or putting a shield in front of it. If the device is black in color
make sure to not change the color of the parts facing away from the sun,
while black absorbs more heat, it also radiates more heat away if facing
something cooler.
I looked up your cam, how are those in general, and how hard to focus, and
which lenses do you have? I am going to assume that the temp range they
are quoting in the internal chip temp, so that temp of that is likely to be
quite a bit higher that anything you can measure on the outside. I would
cover the front and top face and maybe the sides with say white electrical
tape and see if that improves it, and/or put a plate with thin insulation
in front of it to block the sun as much as possible. When I use to use
cams in the window I had to put a black shade around the cams to reduce the
reflections of the white blinds I had behind them from reflecting off the
inside window and preventing the cam from working.
On Mon, May 24, 2021 at 9:17 AM Barry Martin <barry3mar...@gmail.com> wrote:
>
> Hi Roger!
> On 5/23/21 7:21 PM, Roger Heflin wrote:
>
> Are these cams pointing out the window, and if so, is the camera in full
> sunlight? Are some of the cams hotter than the others? A lot of the
> issues with electronics I have seen is less that good testing across the
> operational temperature ran and so the device gets a bit too hot and act
> badly. I have seen ethernet chipsets randomly lose link and reconnect,
> and heat sinks and/or a fan fixed it. So if it is getting a bit too hot
> it could act up in just about any way. So are the cameras that act up
> warmer (or in full sun), and what is your elevation? (5000 ft elevation
> air is about 80% as good at cooling, so a marginal cooling design will be
> much worse there), and often no one really does decent testing around
> temperature.
>
> Actually I had the heat consideration yesterday after swapping in the
> ?updated? RPi SD Card ? the one using Motion 4.3.2. Used a non-contact
> detector from about 12? ( 4m) away and 91?F (33?C) late afternoon ? Sun not
> hitting the window; measured just now (8:30 a.m.) and 85?F (29?C)
> ?currently overcast and so not ?glaringly bright?. Minor occasional
> glitches (I?ll accept those!). (Another camera on a different Pi looks at a
> white vinyl-sided house and never a glitch.)
>
>
> The window (and so cameras) face East, so the heat and Sun could be
> suspect.
>
>
> The cameras are SV-USBFHD06H-BL36, which appear to be the equivalent of
> ELP-USBFHD06H-BL36. (I?ve forgotten how I made this conclusion.) The ELP
> specifications list: Working temperature
>
> -10?70? (storage -20?85?) ? so 14-158?F.
>
>
> Elevation shouldn?t be an issue, though we have joked about about climbing
> up here to the second floor. :) Google lists the city as 571? ? so nowhere
> near the approximately mile you suggested.
>
>
> You asked about if some of the cameras are hotter than others. There are
> two SV (the brand) cameras cameras in the window ? about a foot apart and
> should be ?twins? as same model and purchased together. Both have glitch
> issues, just one much more than the other. Currently ?Camera 1? is
> occasionally glitching while ?Camera 2? is not; yesterday afternoon and
> evening Camera 2 was glitching like mad. No overnight boot/resets. The only
> change I can think of is the date
>
>
> Thanks for the suggestions!
>
> Barry
>
>
>
>
> _______________________________________________
> Motion-user mailing list
> Motion-user@lists.sourceforge.net
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>
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