[TriEmbed] Best way to get several composite video streams into a raspberry pi?

[Rodney Radford]

While what you are describing may be possible, I think you would hit the
limits of the RPi in both USB transfer speed and processing power fairly
quickly.

And by the time you pay for the cameras and the video->USB converters you
are already exceeding the cost of a separate RPi and RPi camera.

Seems an easier solution is just to have multiple RPIs with the RPi camera
stationed at any position you need video, each processing their own video
stream and then networked together to one location to display whatever
data/video you want to display.

Or is the issue that you want to use a prebuilt camera in a housing
designed for the purpose you have in mind? Seems it would be relatively
easy to build a mounting arrangement per each RPi and camera to position
wherever you need it.

They could also store data off on a separate hidden RPi + SD card so that
if the RPi and camera is stolen, you have data backup on the hidden RPi.




On Fri, Jan 4, 2019 at 10:44 AM Brian via TriEmbed <triembed at triembed.org>
wrote:

> Hey gang,
>
> I recently bought a box truck for my lighting business to schlep my gear
> around.  I'm in the process of putting cameras at strategic places
> around the exterior so I can see what I'm about to smash into whilst
> maneuvering.  Rather than have a dozen[0] little LCD monitors scattered
> around the cab, I thought "hey, this might be a cool project for a RasPI
> and OpenGL ES to make a poor-man's bird's-eye-view system like they sell
> to big rigs for $gazillion!"
>
> All the little cheap backup cameras have NTSC composite outputs.  I'm
> looking for the best/cheapest way to get several of those signals into
> the RasPI as, ideally, /dev/videoN devices that I can use as texture
> sources in OpenGL.
>
> It seemed to me that I should be able to find something that has a USB
> plug on one end and a yellow RCA socket on the other for less than, say,
> $20.  There are a ton of capture devices on the market in the $20-30
> range that take in video and stereo audio, but (1) that's just a bit too
> expensive for this project since I'll need one for each camera and (2) I
> don't need audio capture.
>
> Soooo, anybody know of a good, cheap USB composite video capture device
> that might fit the scenario I've described?
>
> Thanks!
> -Brian
>
> [0] - A dozen is an exaggeration, but easily at least 4 or 5.
>
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