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Old Nov 12, 2012, 01:19 AM
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Mysion's Avatar
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USB real time video capture

OK so I recently became the proud new owner of an 900 MHz 800 miliwatt hobby king FPV system. The problem is that I have no way to display composite video. Well our HDTV will do it but it's not portable.

So my plan was to use a laptop with a video capture card. However as I found out when looking for one is that most of them have significant video delay some where around the time of 2 seconds. Witch is far to long for controllable flight.

So is there any one that could recommend a good capture card? I found a few but I don't know how much video delay they have so is there any one here that's braved the waters and could give some advice?
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Old Nov 12, 2012, 07:51 AM
RTFM // copter damaged
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why you dont use a small display or video googles? such 7" displays are cheap.
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Old Nov 12, 2012, 08:35 AM
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Canada, ON, Markham
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Quote:
Originally Posted by Mysion View Post
OK so I recently became the proud new owner of an 900 MHz 800 miliwatt hobby king FPV system. The problem is that I have no way to display composite video. Well our HDTV will do it but it's not portable.

So my plan was to use a laptop with a video capture card. However as I found out when looking for one is that most of them have significant video delay some where around the time of 2 seconds. Witch is far to long for controllable flight.

So is there any one that could recommend a good capture card? I found a few but I don't know how much video delay they have so is there any one here that's braved the waters and could give some advice?
from what i seen, most people uses easycap
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Old Nov 12, 2012, 04:35 PM
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Warthox the reason I want to use the laptop is that is has a nice 17 inch screen and a battery built in. And from what I've seen video goggles start at 300$. I was hoping for a capture card under 100$ and they exist but some have bad lag....

Lildevilx I was going to go with easycap but then I saw some other uses on the forum mention that it has a 2 second delay.
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Old Nov 13, 2012, 04:17 AM
RTFM // copter damaged
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Quote:
Originally Posted by Mysion View Post
Warthox the reason I want to use the laptop is that is has a nice 17 inch screen and a battery built in. And from what I've seen video goggles start at 300$. I was hoping for a capture card under 100$ and they exist but some have bad lag....
mh ok.
you can power these lcds with the same 3s lipo which you use for the video rx.
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Old Nov 13, 2012, 09:33 AM
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I've played around with easycap and another external tuner myself but you'd be better off with an external LCD screen. You won't get instant video relay on a laptop unfortunately. $100 should buy you a 10" screen as well.
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Old Nov 13, 2012, 12:01 PM
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vusix 920 video glasses turn up cheap on ebay and sometimes on amazon, great for fpv.


good thread on them here

http://www.rcgroups.com/forums/showthread.php?t=1629170
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Old Nov 13, 2012, 08:06 PM
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i have tried almost everything, best is external lcd, i am using 16" 12volt kogan.com monitor.

any converter will induce a lag, some a very low latency but even 7ms of lag is annoying

powered from a lipo or the car 12v

then use the capture cart to record very handy for crash recovery.
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Old Nov 14, 2012, 02:49 PM
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Well thanks for the advice! Looks like I'm going to try and get a 12 volt screen then.
Thanks for helping me not waste my cash either.
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Old Nov 15, 2012, 05:20 PM
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ermmm if you have a pcmcia slot on your laptop you could buy a tv card. That's what i was doing... Be warned though laptop screen is unreadable in the sun
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Old Nov 25, 2012, 12:36 PM
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I am using an ION Video2PC adapter: http://www.ionaudio.com/products/det...ideo-2-pc-mkii

It works great. You only get lag if you enable the video capture utility on your PC. But it depends on what software you are using.

I am using vDUB as my video display, and i am using Camtasia 8 as my screen capture utility. I do not record the laptop screen that often, as my FPV camera has the ability to record straight to micro-SD card.

Here is some video to show what i see on my laptop as I fly:
FPV is hard (2 min 48 sec)


I picked up the ION video2pc for $14 off ebay. If you look for one, make sure you get a "video2pc MKII" which is Win7 compatible.
Also, keep in mind that my laptop has a nVidia GeForce GT550M GPU and an Intel Sandybridge i7. I will be setting up a spare laptop that just has a 1.8ghz centrino to see if I get the same results from lesser hardware.
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