Using Android Phones To Stream Video Remotely?

[lxskllr]

As a use case, think backup camera for a vehicle, both explicitly, and over a distance of a couple hundred feet. I'd like to be able to position one phone viewing an object, and view what it's seeing over another phone. Even better would be multiple remote cameras, and being able to switch between them. Latency isn't a big deal so long as it isn't measured in minutes.

What I have...

Android phones of various ages, with termux on all of them, but possibly not up to date on the oldest phones.

Requirements...

No cellular or other network access other than locally through the phones.
Very much prefer libre software. I might consider something proprietary, but I don't want to go that route.

I'm a little on the stupid side, but I suspect something could be hacked together with termux. Firm ideas, or even rough ideas of how to attack the problem are appreciated.

 

[mxnerd]

Without connection to wifi router/AP or a wireless tower, there is no IP addresses assigned to mobile devices, how do you communicate with each other?

And how does turmux has anything to do with this?

 

[lxskllr]

Termux is a cut down linux environment, terminal based. There's a lot of tools in there, and I'm thinking there may be a way to setup a streaming server and broadcast a camera feed. If wifi isn't doable, perhaps bluetooth.

 

[mxnerd]

Even Bluetooth 5.0 has a top speed of 2Mbps and a theory 800ft direct line of sight under perfect condition, what can you do with this abysmal bandwidth?

I know what Termux is. Again, how does it has anything to do with this case?

 

[lxskllr]

Again, how does it has anything to do with this case?

I'm not trying to be a dick, but if you aren't going to read what I write, why are you replying?

I'm thinking there may be a way to setup a streaming server and broadcast a camera feed. If wifi isn't doable, perhaps bluetooth.

also...

Latency isn't a big deal so long as it isn't measured in minutes.

 

[mxnerd]

Good luck.

 

[mxnerd]

Without AP/router, smartphone must resort to WiFi Direct feature to communicate with each other, yet not all smartphones support WiFi Direct. They also have to go through a Group Owner election process, where server and client gets elected and IP addresses being assigned. With small antennas inside of most smartphones, I also don't think smartphones can see each other several hundred feet away.

Google search result.

wifi direct group owner election - Google Suche

You can see some code blocks discussed by some, you can also click on image result to visit other articles.

There are technologies that being studied, you need to purchase the document however. (WiFi Direct did reach 200M according to the study however)

Live Streaming over Wi-Fi Direct Multi-Groups | Semantic Scholar

The result of evaluations indicates that the proposed method could stably deliver a live video stream of QVGA quality to subscribers located at 200 m away from the source and could quickly recover from link failures in about 12 sec, which is significantly shorter than the normal AODV. Mobile...

www.semanticscholar.org

Bluetooth used by smartphone are low energy, low bandwidth, short distance. You will need large antennas to make it transmit long distance (usually audio only).

Amazon.com : long range bluetooth