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CarbonXtreme . Midland Helicopters . HeliProz

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Aerial Photography and Video > Device for viewing live video signal
 
 
3DRecipe
Heliman
Location:

My Posts This: Topic  Forum		I know I have read some posts about devices used for viewing the live video signals though I think it would take a while for me to find those posts again. So, I am wondering what are the best devices for doing this? Are the mini DVD players worth using or how about a small crt? Specific makes, models, distributors?
12-04-2005 Over year old.
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MPA
Elite Veteran
Location: Australia

My Posts This: Topic  Forum
Quote 
I think it would take a while for me to find those posts again


Its up to you how much info you want to get, while you may get a few replies here, if you use the search function here at RR and do a bit of leg work youll get a very broad spectrum of information in here on the topic..
Choose keywords and youll get a pile of post worht reading first.
There is much on the subject written here already.

www.rvv.com.au
12-04-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		I just bought a 60GB one of these:

http://www.archos.com/products/tv_c..._500/index.html

The screen is excellent, it's completely self contained and will record the downlink video as well as let you watch it. The battery is supposed to last over 4 hours too.

I haven't tried it with the heli yet though.

John C.
12-04-2005 Over year old.
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hobbyguy4
Senior Heliman
Location: Lafayette Indiana

My Posts This: Topic  Forum		That is very impressive John. I am quite intrigued. As soon as you do use it, could you share the results with us.

Sean
12-04-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		It is an amazing device Sean!.

The only thing is that I have found you need a special adapter plug as well if you want to record video away from the TV pod thing you get with it.

Only a bit of plastic - but, as usual, its a completely non-standard plug so you have to buy theirs.
12-04-2005 Over year old.
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Lorents
Elite Veteran
Location: Oslo, Norway

My Posts This: Topic  Forum		3dRecipe, you could try a search for "black widow" - may be you can find some more info about what people are using to view live feeds.

JohnC, I was just about to order myself one of those to use with a downlink - and then this post came up



What comes around goes around.
12-04-2005 Over year old.
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wesb1999
Senior Heliman
Location: Athens, Texas

My Posts This: Topic  Forum		I use a Black Widow Digi-Live for the video downlink fed into a small TV monitor for the camera operator. The video is split to also feed into a set of Eyetops for the pilot to view as well. This works very well for me.

I've been considering recording the live video on the ground and the Archos unit JohnC mentioned looks great. I'm deciding between this and an ADS Instant TV for Laptops. It's a lot cheaper and I have the laptops available. I'll probably order the ADS unit (because it's so much cheaper) and see how well it works. Still the Archos is all enclosed and a much slicker product. Either way I think it would be nice to have the full flight on video for my own scrutiny!

Hope this helps...

^~^~^~^~^~^~^~^~^

Wes
12-04-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		wesb1999,

I've used a laptop in the field quite a lot in the past, and it's just a royal pain. The faster they get, the longer they seem to take to boot up. Your damn screen saver/power management will catch you out and it will get covered in mud. Plus, they are very awkward to position conveniently without tipping over on uneven ground - particularly if you have the screen wide open so you can see it stood up. Finally they are real awkward to move about when the screen is open.

I have been using my mini-DV camcorder which accepts analogue in. That worked pretty good - I could watch the downlink on it's LCD and record it.

Let us know how the ADS unit works out : all previous video captures I used on a PC gave pretty poor results - but that was quite a long time ago.

John C.
12-04-2005 Over year old.
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wesb1999
Senior Heliman
Location: Athens, Texas

My Posts This: Topic  Forum		JohnC,

That's a great idea, also. Which miniDV do you use? I think I'll try that with my older camcorders. If it works it'll save the money... (yeah, I'm cheap)

Wes
12-04-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		The one I have now is a Sony TRV80. This aint so cheap - but I don't know how widespread the analogue-in function is.

Maybe an old analogue camera might work. The only down side to these is that if the downlink drops out for a split second, it takes the video a second or two to resync when you play it back - and it's real annoying.
12-04-2005 Over year old.
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cyber-flyer
Senior Heliman
Location: Boston, MA

My Posts This: Topic  Forum		John,
Can you please check if Archos recorder can handle video drop outs? Someone told me that Mpeg-4 compression gets confused by intermittent loss of sync signal and that severely degrades the recording quality.
Thanks,
Val.
12-05-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		Hey Val,

How are you doing ?. I hope winter isn't too severe over there.

I will indeed check that out as soon as I can. I hope it can cope with it OK. It was real annoying on analogue video when it lost sync : the DV camera coped much better.

Still - it's a cool gadget I can use myself even if it doesn't work. At least it won't get thrown into the attic with all the other mistakes I made
12-05-2005 Over year old.
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cyber-flyer
Senior Heliman
Location: Boston, MA

My Posts This: Topic  Forum		Hey John,
Things are quiet here - the winter has finally arrived and small snow storm was promised for tomorrow. How is the weather on your side? What's your altitude record so far? Oh wait, send it through a private mail, no need to upset FAA police

I have finished 9600 bps modem that sends data on audio chanel of video transmitter. Now my plan is to put antenna azimuth/elevation calculation on ATMega and make my tracking antenna self contained (independent of laptop). Once it's done I'll have a compact long range video downlink package with diversity receiver and build-in tracking antenna. At least that's the plan.
I am using Sony D8 video camera now for video downlink recording but was looking around for something smaller. The HD based recorder looks like a good replacement. Let me know how it works out for you.
12-05-2005 Over year old.
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JohnC
Veteran
Location: East Yorkshire, England

My Posts This: Topic  Forum		Hey Val,

Our weather is dull, grey, cold and wet. Snow would be a welcome photo opportunity.

I just touched 400 feet last week with the Joker
(Thats me wearing magnifying specs so it looked like 400 feet)
Not in your league though.

I did some test of the Archos while trying make the downlink dropout.

This was recorded at 1000bits per second (it will do 1,500 if you want) and it looks reasonable. The actor in the video is actually eating the performance fee as you watch.

Archos Video during dropouts

Next step is a real test flight - but I'm still waiting on the special connector.

Good to hear you're keeping busy!,

John C
12-09-2005 Over year old.
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cyber-flyer
Senior Heliman
Location: Boston, MA

My Posts This: Topic  Forum		Hey John,
That's looks pretty good to me, completely usable.
Nice actor! Thanks a lot for the test.
Val.
12-09-2005 Over year old.
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Angelos
Key Veteran
Location: nr Oxford, OX11, UK

My Posts This: Topic  Forum		I bought an Archos hard drive MP3 player 3 years ago and I was not pleased at all with the purchase. The device had several firmware bugs. But what I annoyed me the most is that they moved on to a new release of the product and the new firmware would not support the older generation device. Not good business practice at all!

Spartan RC R&D - Visit us at our local club www.helicollective.org.uk
12-09-2005 Over year old.
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Aerial Photography and Video > Device for viewing live video signal
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