Controlling factors for final video resolution in FPV?

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Controlling factors for final video resolution in FPV?

Postby VirginiaJim » Mon Oct 31, 2016 11:31 am

This is an area that desperately needs explanation and clarification.

Many of us peruse Hobby King, Bang Good, Gear Best, Tmart, Amazon, EBay, and other online providers for small, cheap, light, and flexible video cameras that can be adapted to First Person View (FPV) live video display and DVR recording of our flights.

Many, if not most of us, desire the ability to capture more than standard 640x480 (VGA) resolution in our videos to show others our flights, after-the-fact. Yet many of the You Tube videos I see of others flights are blotchy, with large pixels, and poorly exposed, even for those trying to compare different key components in their FPV systems. What are the keys to good results?

But is there technology we do not understand that severely limits what resolution we can capture and later display through our computers playing MOV, AVI, MP4, or other video storage formats?

Where exactly are the bottlenecks in this process?
a) Is it the camera to video transmitter (VTx) interface?
b) Is it the video receiver (VRx) to DVR interface?
c) Is it the display system itself?
d) Are we foolish for seeking the highest pixel resolution we can get in a small camera when another bottleneck in the image processing system renders high resolution images and video from the camera moot to the final result?

What specifications should we be insisting on that will give us the information we need to assure we get the best quality and resolution in our saved video captures we can achieve with the equipment we have?

I've decided to offer one new camera/VTx/DVR system I've recently discovered on the Bang Good site as an example which may prompt useful discussion for all of us:

Camera

Claims "effective" resolution of 1920x1080.
http://www.banggood.com/Eachine-V-tail- ... mywishlist

This cheap camera claims 1280x960 resolution and it appears to use an adapter that wold work with the Eachine V-Tail VTx and DVR.
http://www.banggood.com/600TVL-1_8mm-14 ... rmmds=cart

VTx
http://www.banggood.com/Eachine-V-tail- ... mywishlist

DVR
Claims to record "effective" pixel : 1920(H)x1080(V)
Records frame rate : 60Frames
Compress format : MOV
but only reports a Video output size : 640x480 WHY?
http://www.banggood.com/Eachine-V-tail- ... mywishlist

VRx
http://www.banggood.com/Eachine-ER32-5_ ... mds=search

I'm not sure of a monitor to offer for discussion that could handle as high as 1920x1080 resolution video.

Comments are welcome. I hope Bruce takes charge of these questions and provides one of his excellent You Tube videos on this topic.

Thanks.
VJ
Viva la old farts! Flying when I die!
VirginiaJim
 
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Joined: Fri Aug 19, 2011 4:13 am
Location: Washington, DC

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