Forums: Skydiving Disciplines: Photography and Video:
air/ground video

 

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XDV  (D 587)

Dec 12, 2002, 8:11 AM
Post #1 of 26 (3273 views)
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air/ground video Can't Post

There is somebody who know something to give good air/ground video like in the past x-game for skysurfing

thks


Cajones  (D License)

Dec 12, 2002, 8:29 AM
Post #2 of 26 (3253 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

Yes. How much do you want to spend?


XDV  (D 587)

Dec 12, 2002, 8:55 AM
Post #3 of 26 (3248 views)
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Re: [Cajones] air/ground video [In reply to] Can't Post

it's all depend of the quality, it's for a project that can be sponsored,

the range of price is................. Crazy


Premier quade  (D 22635)
Moderator
Dec 12, 2002, 9:31 AM
Post #4 of 26 (3238 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

I can get you -perfect- air/ground video for about $1000/day.

Got that much?


XDV  (D 587)

Dec 12, 2002, 9:45 AM
Post #5 of 26 (3234 views)
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Re: [quade] air/ground video [In reply to] Can't Post

Yep, is it the same as the x-game or his the unit for the helmet is smaller.... may be we should talk about that outside the forum

I'm interested for that king of equipement


XDV  (D 587)

Dec 12, 2002, 9:49 AM
Post #6 of 26 (3232 views)
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Re: [quade] air/ground video [In reply to] Can't Post

And what about if we want to buy a system, with good quality

thks


Premier quade  (D 22635)
Moderator
Dec 12, 2002, 10:16 AM
Post #7 of 26 (3229 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

Not exactly certain about purchases. I -believe- the system is only available right now for rentals, but as with everything I'm sure that could be negotiated.

There are currently 2 systems that I would look into;

http://www.linkres.co.uk/ Click on products/link research/linkxp
and
http://www.bms-inc.com/9_carrycoder.htm

Both units will be VERY expensive to purchase, but as special event rentals they aren't actually too bad.

I've used the LinkXP system (first URL) recently for some extremely difficult ground stuff with amazingly good results.

Neither is designed specifically for skydiving apps, but could easily be adapted by the local rep that would follow the gear for a rental situation.


Cajones  (D License)

Dec 12, 2002, 10:54 AM
Post #8 of 26 (3219 views)
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Re: [quade] air/ground video [In reply to] Can't Post

The system originally built for the WFFC was less than $5000. There was actually more invested in parts/configurations that did not work well. The final configuration was good for very clear video and good audio (audio was secondary, of course). If you are looking for broadcast quality, the camera used would have to be upgraded, but the transmitter/reciever would work just fine.

The system was lost in a house fire, and I haven't had the capital to rebuild it. Certainly not something you'd want to build for a one-off production, but if the demand was there, I'd consider building another.


Premier quade  (D 22635)
Moderator
Dec 12, 2002, 10:59 AM
Post #9 of 26 (3215 views)
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Re: [Cajones] air/ground video [In reply to] Can't Post

I'm not saying it -couldn't- be done for less cash. Wink

No. What I'm saying is that if you wanted broadcast quality air-to-ground video suitable for covering say, a demo squad jumping into the Olympics or something of equal criticality, there is currently some amazing off-the-shelf stuff you can rent.


Cajones  (D License)

Dec 12, 2002, 11:04 AM
Post #10 of 26 (3213 views)
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Re: [quade] air/ground video [In reply to] Can't Post

Definitely agree. Just to clarify (I got distracted) - renting would probably be more cost effective for just a few events.


CameraGeek  (D License)

Dec 12, 2002, 12:19 PM
Post #11 of 26 (3201 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

Of course, you could ask ANDREVIDEO, since he invented it - literally - and built the first unit from scratch. Not many know this, but he was doing it live in the mid 1980's with awesome quality - but never patented it. Frown

http://www.andrevideo.com - andre at andrevideo dot com

Its more affordable - but I hope you speak his language...

Robbie Culver


Premier quade  (D 22635)
Moderator
Dec 12, 2002, 1:38 PM
Post #12 of 26 (3189 views)
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Re: [CameraGeek] air/ground video [In reply to] Can't Post

Yeah, but I believe that was an older analog system much like the one that the Wagner's still occasionally use.

The issue I have with these older systems a problem called multi-path. Bascially, the signal gets reflected by objects along the way and can cause some significant interference in certain circumstances -- requires a bit of skill and luck to get it running right. Obviously the systems were great for their time, but the current state of the art is so much better and darn near fool-proof. If you need something you can count on actually working, the newer COFDM systems are definately the way to go.


newshooter12  (D 29298)

Dec 12, 2002, 11:31 PM
Post #13 of 26 (3164 views)
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Re: [quade] air/ground video [In reply to] Can't Post

Quade - you're spot on with the analog/dig microwave comparison. I had a live shot today with a conventional microwave ENG truck that should have been really easy to get a good signal. I was within a stone's throw of the tower I was trying to hit, but ended up with a very marginal signal b/c of "multi-path" reflections/bounces... It can be a royal pain some days.
I'm not an engineer, but how does the newer system get rid of the multipath so well? matt


Premier quade  (D 22635)
Moderator
Dec 13, 2002, 9:47 AM
Post #14 of 26 (3136 views)
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Re: [newshooter12] air/ground video [In reply to] Can't Post

The key technologies behind the COFDM stuff are Mpeg compression and transmission algorithms that actually take advantage of multi-path.

In other words . . . multi-path actually helps rather than hurts. So, you don't have to have line-of-sight and being in a concrete canyon is no obstacle. Go ahead and shoot around the corners of a building back to the microwave truck, no big deal. Further, because it's all digital, there's no signal fade really -- it's either working or it isn't. This can be an advantage and also a disadvantage depending on the way you look at it, but generally speaking it looks better with a weaker signal right up until the time it craps out.

The only drawback with the newer systems is there is a slight delay because of the Mpeg compression and transmission of about 1/10th to 1/3rd of a second depending on how robust you want the error correction. This is damn near trasnparent at the 1/10th of a second delay, but is roughly the same as a standard satellite delay at the 1/3rd of a second end of things. Makes IFB & cueing interesting.


newshooter12  (D 29298)

Dec 13, 2002, 10:56 PM
Post #15 of 26 (3103 views)
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Re: [quade] air/ground video [In reply to] Can't Post

Thanks for the info... matt


AndyMan  (D 25698)

Aug 22, 2006, 7:54 AM
Post #16 of 26 (2833 views)
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Re: [quade] air/ground video [In reply to] Can't Post

<bump>

Anyone ever used a system like this?

http://www.floatograph.com/24ghzvideosystem.html

I'm looking for an innexpensive system, broadcast quality is not a priority.

_Am


4dbill  (D 11664)

Jan 28, 2010, 3:06 PM
Post #17 of 26 (2620 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

Is it possible to transmit live video air-to-ground via 3G/4G cellular network? I am sure its technologically possible, but has anybody done it? I am a cell phone dealer and am very interested, because it would be cheap with unlimited data plan.


theonlyski  (D License)

Jan 28, 2010, 3:13 PM
Post #18 of 26 (2616 views)
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Re: [4dbill] air/ground video [In reply to] Can't Post

In reply to:
Is it possible to transmit live video air-to-ground via 3G/4G cellular network? I am sure its technologically possible, but has anybody done it? I am a cell phone dealer and am very interested, because it would be cheap with unlimited data plan.

Once you're in the range of the cell phone, sure... why not?


AHoyThere  (D 12622)

Jan 29, 2010, 7:22 AM
Post #19 of 26 (2544 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

This is something that I wanted to test out but never got around to it. Might be an inexpensive consideration. Don't know if it would have the quality that you were looking for.

Good luck w/ your project.
http://www.wirelessvideocameras.net/...nlink_no_camera.html


sdls  (D License)

Jan 29, 2010, 10:33 AM
Post #20 of 26 (2514 views)
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Re: [AHoyThere] air/ground video [In reply to] Can't Post

I also have been wanting to test this out - I actually ordered this while ago but then heard that it's too powerful here and cancelled the order.

http://www.r2hobbies.com/proddetail.php?prod=rcsc00013


Laszloimage  (D 22468)

Jan 29, 2010, 4:10 PM
Post #21 of 26 (2484 views)
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Re: [4dbill] air/ground video [In reply to] Can't Post

Some people brought their Iphones on the plane to test the GPS. They normally lost signal less than half-way up to jump altitude (cell navigation requires reception from the tower too). We have concluded the cell towers are transmitting in a super flat angle; the antennas dont beam up ward at all. Engineers designed the cell tower system to beam in a flat radial angle rather than every (spherical) direction .

Theres another thread about this somewhere on DZ.com. We agreed the digital signal would be the best. I think the easiest would be if a 1-2watts of UHF transmitter would be directly modulated from the fire wire port. Now days a size of such a transmitter is very small and light, the 2watts of power in that frequency is strong enough even with a wave antenna to transmit in a few miles radius. And of course the digital signal would allow transmitting without the loss of the quality.


(This post was edited by Laszloimage on Jan 29, 2010, 4:22 PM)


Laszloimage  (D 22468)

Jan 31, 2010, 6:05 PM
Post #22 of 26 (2395 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

I found this on ebay:
http://cgi.ebay.com/...?hash=item35a6a688f1
...and it's only $375! 4 Watts on the UHF band is pretty good. This only for analog SD signal though.
But I'm sure it would do the job pretty good.

I would love to combine somehow this: http://www.arcade-electronics.com/...roduct%20Sheet-2.pdf with that 4 watts TV transmitter. This device basically is an HDMI RF modulator (I assume somewhere in the UHF range). That would create a UHF DTV transmitter.

I also found a bunch of devices like this (lot cheaper ones too):
http://www.wwbroadcast.com/...2E0J8CFQ8MswodGmXk0w
and they could maybe combined with this:
http://www.streakwave.com/...VE1/Video/12-505.pdf


sdls  (D License)

Jun 27, 2012, 2:57 PM
Post #23 of 26 (1723 views)
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Re: [XDV] air/ground video [In reply to] Can't Post

Ok, google did it?

Project Glass: Skydiving Demo at Google I/O 2012.

Even though I don't think it was done really live at I/O 2012 today (as they are writing in Engadget) that looks interesting concept.


nickfrey

Jun 27, 2012, 3:10 PM
Post #24 of 26 (1722 views)
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Re: [sdls] air/ground video [In reply to] Can't Post

In reply to:
Ok, google did it?

Project Glass: Skydiving Demo at Google I/O 2012.

Even though I don't think it was done really live at I/O 2012 today (as they are writing in Engadget) that looks interesting concept.

It was done really live today, with sergey and jt chatting via video before they exited the blimp. Not broadcast quality but pretty damn good.


sdls  (D License)

Jun 27, 2012, 3:18 PM
Post #25 of 26 (1720 views)
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Re: [nickfrey] air/ground video [In reply to] Can't Post

In reply to:
It was done really live today, with sergey and jt chatting via video before they exited the blimp. Not broadcast quality but pretty damn good.

Did someone see video stream and skydivers at the same time and can confirm that it was live?


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