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Why the Webcams Shake

Posted By:
Fareed Guyot
Young Eagles Pilot or VolunteerAirVenture Volunteer
47
Posts
25
#1 Posted: 7/29/2010 09:05:17

There has been some questions about why the webcams shake. Its due to several factors. Because Wittman Field is owned by the county we were limited to mounting the cameras on EAA buildings.

The EAA Radio building was an obvious choice.  On runway 9-27 there was only one building close enough to the runway that would have positioned the camera to view both ends of the runway. 

These locations also had to have some sort of data connection.  We cannot just stick a camera on a pole in the middle of a field. There has to be a cost effective way connect these cameras to the internet.  Buildings with phone lines were selected for this reason.

The 9-27 cam is located on a sturdy 4x4 on the roof of the Flight Line Operations building.  The volunteers are a very active bunch and every time they walk on the roof (used for plane spotting and parking coordination) there is the possibility for camera shake.

Runway 18-36 cam is located at EAA Radio, a building that used to be many things and in many configurations in the 40 years of a convention in Oshkosh. EAA Radio's primary on-air studios are located on the 2nd floor which is all windows and no insulation.  To keep this part of the building cool a very large and very old air conditioner hums away day and night.  The A/C sometimes provides a vibration which shakes the soffit and that vibration translates to the camera. This is most pronounced when the camera is at full zoom.

The shaking is undesirable for EAA volunteers and staff as well and we have worked hard to provide these feeds, solving a myriad of technical issues too numerous to go into detail.  I ask people to focus on the fact that from last year to this we have increased the number of cameras and that they are working very well. In addition to that we are also providing live video of theater in the woods.

More stable and effective camera locations are desired but that also takes further investment in infrastructure which is only possible through the support of our EAA members.



Thank You for listening to EAA Radio. Afterburner Al - Station Manager-Emeritus, EAA Radio - http://www.eaaradio.net
Jim Heffelfinger
Homebuilder or Craftsman
184
Posts
33
#2 Posted: 7/29/2010 10:54:32

Thanks Fareed for your service and support. It is truely amazing that those of us unable to come can get a glimps of the event.

Here are a few thoughts. Agreed from the safety of my office chair.

The video quality of the Aeroshell Sq camera is outstanding.  The runway cams not so much.  I am guseeing here that they are of differing resolution.  Seeing in flight aircraft is just a moving blob at expanded display and runway aircraft just a bit better. 

The shake frequency is very low and quite steady. Amplitude seems to increase with windspeed.  I am going to guess you have the cameras on extensions.  It is not the usual people walking around shake nor the higher speed of an A/C fan unless the extension is taking on a harmonic.    I have been guessing that the cameras were on poles that had flags on them. 

Just one more item to add to the "solve it for next year list".

Since no one is asking - how is the gate compaired to last year?

jim heffelfinger

watching from Sacramento CA



Paul Hayden
AirVenture Volunteer
24
Posts
5
#3 Posted: 7/29/2010 13:05:01

all 3 of the cameras, enclosure, mounting arms and encoders are identical.  the picture quality is due to the way the encoders work.  the camera wiggling causes the encoders to have to process and send more data because they basically only send the difference between the current frame and the last one. 

the aeroshell square camera is the one we thought we would have issues with, its the most stable.  the eaa radio building is greatly affected by the old window air conditioning unit, that we have corfirmed.  and no none of the cameras have flags.

 



Chairman EAA Airventure Streaming Media
Steve Wylie
AirVenture Volunteer
95
Posts
93
#4 Posted: 8/1/2010 21:17:26

I noticed some shake now and then but to be honest was so focused on the action going on it was a non-issue.  I had no problem clearly recognizing various aircraft as they flew by.  Even saw the Lone Star Flight Museum B-17 land at OSH after leaving here that same morning.

So even though I couldn't go this year, I got a taste of AirVenture on no less than four simultaneous cameras.  I kept them up on my screen all week along with LiveATC.net.  Even got to see a wedding in the Eagle Hanger one night.  Below is a picture of my view of AirVenture 2010 (taken tonight after dark - looked a lot better with daylight images on the webcams).

Thank you all at EAA for your work to make this happen!

Yes you can always improve and I appreciate that EAA is always looking to take that next step in any given area, but even "as is" the cameras were fantastic and greatly appreciated!  Webstreaming is a difficult balance.  Compare the AirVenture setup to many other webcams, and most Aviation events that don't even have webcams, and it's clear that we have a very good thing going here.  

Thanks again!

Steve

D21_0015.JPG

Sawdust
Penny Bowman
Young Eagles Pilot or VolunteerHomebuilder or CraftsmanAirVenture Volunteer
71
Posts
12
#5 Posted: 8/2/2010 08:33:39 Modified: 8/2/2010 08:34:54

EAA AirVenture Team --

LOVED the webcams !!  Next best thing to being there (which I will be in 2011).  THANKS!

As for shake -- yes, hard to see sometimes.  But I noticed that the camera seems to be about the same height as one of the speaker poles.  SEE ATTACHED file named: AirVenture 2010 - Runway 18-39 Webcam - 1.JPG  If the air conditioner/building are such an issue, maybe one more pole (dedicated to a camera) would be in order for 2011?

Also -- re Runway 9-27 camera -- I wish it was turned a bit more often towards the warbirds area -- It seemed most often to be aimed straight across the runway and never panned as often as the nice aeroshell camera was.

One last thing -- Be careful ... You seem to have some yellow jackets around the Aeroshell camera -- SEE ATTACHED file named:   AirVenture 2010 - Aeroshell Square Webcam - may be yellow jacket.JPG

 

Steve -- HOW did you get the webcams to come up as separate, small windows without just being part of an Oshkosh365 page?  SEE ATTACHED file named:  AirVenture 2010 - Webcam - wish in small window.JPG

 



Files Attachment(s):
AirVenture 2010 - Runway 18-39 Webcam - 1.JPG (40764 bytes)
AirVenture 2010 - Aeroshell Square Webcam - may be yellow jacket.JPG (4036 bytes)
AirVenture 2010 - Webcam - wish in small window.JPG (81552 bytes)
President, Greater Boston EAA Chapter 106 - Come visit & find out why we have over 200 members in MA, NH, RI, & CT! www.EAA106.org
Paul Hayden
AirVenture Volunteer
24
Posts
5
#6 Posted: 8/2/2010 14:28:28

thanks guys, glad you enjoyed them.

the 18/36 camera was mounted on the roof line of the two story EAA Radio building, because silly us, we figured that would be nice and stable.  The poles you see exist for about 2 weeks a year and are not very sturdy at all.  We are looking into other mounting options that would provide a stable base, but not be there all year.  I guss for some reason airports have an issue with stuff sticking up into the air

lol, the 9/27 camera...it did have it swing into the warbird area for ahile, but between the wiggle when I zoomed that much and the much posted about potty view, coupled with many posts about just wanting to watch the runway,  I changed the tour.  I personally am shooting for more warbird coverage next year...one of my favorite areas.

 



Chairman EAA Airventure Streaming Media
Steve Wylie
AirVenture Volunteer
95
Posts
93
#7 Posted: 8/2/2010 20:06:36
Penny Bowman wrote:

 

EAA AirVenture Team --

LOVED the webcams !!  Next best thing to being there (which I will be in 2011).  THANKS!

As for shake -- yes, hard to see sometimes.  But I noticed that the camera seems to be about the same height as one of the speaker poles.  SEE ATTACHED file named: AirVenture 2010 - Runway 18-39 Webcam - 1.JPG  If the air conditioner/building are such an issue, maybe one more pole (dedicated to a camera) would be in order for 2011?

Also -- re Runway 9-27 camera -- I wish it was turned a bit more often towards the warbirds area -- It seemed most often to be aimed straight across the runway and never panned as often as the nice aeroshell camera was.

One last thing -- Be careful ... You seem to have some yellow jackets around the Aeroshell camera -- SEE ATTACHED file named:   AirVenture 2010 - Aeroshell Square Webcam - may be yellow jacket.JPG

 

Steve -- HOW did you get the webcams to come up as separate, small windows without just being part of an Oshkosh365 page?  SEE ATTACHED file named:  AirVenture 2010 - Webcam - wish in small window.JPG

 

 

Penny - I use the Google Chrome browser.  Chrome lets you click-hold on an individual tab in the browser and drag it out as it's own window.  So I would open a camera, pop it out as it's own window, and then downsize it to just the webcam view.  Then repeat for the others.   Each one is actually still on the Osh365 page, I just had 3 of them open at once.  I know IE doesn't do that, not sure about FireFox  Hope that helps.  Steve



Sawdust