Android Question Room Chat Audio

Magma · Jun 22, 2020

Hi there...

Well i want to create a Room Chat Audio... which actually will be more than Duplex...

Everybody they will talk (if press a button) and listen the same time... and all these through internet...

Already see and work with bluetooth example... but i want all these through internet and with low bandwidth if it is possible something like voip multi conference...

My idea is to paying an Audio Server Streaming Service (i don't know any good and cheap) - but i want to have the ability from b4x apps (my apps) to upload in realtime audio (and in the same time listen) (ofcourse having headset)

So anything to start (somehow use an audio codec with medium quality) - and how i will stream to the web... any cheap service or something someone already use ?
and ofcouse any lib or example will be very helpful !!!

Thanks in advance !!!!

Magma · Jun 23, 2020

Found that but has no any source to start + there is no working site of free PTT Server...

link: https://www.b4x.com/android/forum/threads/push-to-talk.38176/
someone can help ?

TILogistic · Jun 23, 2020

see:

Walkie Talkie - Audio streaming over Wifi or Bluetooth

This example implements a simple "walkie talkie". (src: wikipedia) Once the two devices are connected, either over Bluetooth or over the local network, you can press on the activity and talk. The audio captured from the microphone will be sent to the other device and played. Note that this...

www.b4x.com

TILogistic · Jun 23, 2020

Android Sip / Voip tutorial

With the new Sip library you can make audio calls using Voip (Voice over IP) services. Sip features were added in Android 2.3 (API level 9). Note that not all devices above Android 2.3 support Sip features. In order to use this library you will need to set android.jar in Tools > Configure Paths...

www.b4x.com

TILogistic · Jun 23, 2020

VOIP SIP SDK for B4A

VOIP SIP SDK for B4A allows to build a custom SIP softphone for Android 2.3.x, 4.x, 5 with support of voice and video calls (please see the screenshots in attachment). Features: • Android 2.3.x, 4.x, 5,6 • Support of SIP and RTP • UDP/TCP support • secure connection via SRTP • STUN •...

www.b4x.com

TILogistic · Jun 23, 2020

create you server:

[B4X] Network + AsyncStreams + B4XSerializator

Better implementation, based on B4XPages: https://www.b4x.com/android/forum/threads/b4x-b4xpages-network-asyncstreams-b4xserializator.119011/#content New video tutorial: This is a simple and important example. It demonstrates several good practices related to network...

www.b4x.com

[IoT] MQTT Protocol

What is MQTT? "MQTT is a Client Server publish/subscribe messaging transport protocol. It is light weight, open, simple, and designed so as to be easy to implement. These characteristics make it ideal for use in many situations, including constrained environments such as for communication in...

www.b4x.com

Magma · Jun 23, 2020

@oparra Thanks for all these answers... but already searched the forum and saw them...

MQTT -> is good for other situations not VoIP like... voip is voip afterall
Walkie Talkie -> is very good for Lan - not throught internet
SIP/Voip -> is the client side... ok with this....

but as you can see the link i ve already attached is what i am searching...

actually a voip server that will work like ptt server (preferable free ofcourse)
and some source - or the start of voip client that will connect at this ptt server...

DonManfred · Jun 23, 2020

Magma said:
actually a voip server that will work like ptt server (preferable free ofcourse)

I never saw any free VoIP-Service.

Magma said:
and some source - or the start of voip client that will connect at this ptt server...

I also never saw a b4x client for any (no matter which) VoIP Server.

Maybe ABTO also provide a b4a client; but it is not a free Service.

Magma · Jun 23, 2020

@DonManfred Voip Server... -> Free like 3cx, asterisk (not service) ++++++ if you see that link: https://www.b4x.com/android/forum/threads/push-to-talk.38176/ (but now not alive and can't find it)

in this link - also there is a voip client that works like PTT client but no code because is a work (but is something like i want to create)... not many rooms - only one - but that's the idea...

PTT Server (Asterisk version) -- FREE

DonManfred · Jun 23, 2020

Even if there is a free server available. It is nothing you could connect to without setting up a asterix-server on your server first!

There is no library or client to work with a asterix-Server here in forum. So i think posting asterix as a reference is of no or less help

Magma · Jun 23, 2020

from the client side was thinking use: https://www.b4x.com/android/forum/threads/sip-voip-library.13089

Hope that this working with every voip server... because of native android voip ? or no ?

DonManfred · Jun 23, 2020

You need to try.
I can´t answer this.
I never used VoIP on Android.

Magma · Jun 23, 2020

@DonManfred Thank you for your answers!! - i will try it...

moster67 · Jun 23, 2020

I have wrapped 3 or 4 commercial PTT Sdk frameworks for a fellow B4X User while he has set up everything else.
Maybe he has some advice or knows alternatives? I will send him a PM about this thread but I know he's a very busy man so no promises that he will get back to you.

Philip Prins · Jun 23, 2020

moster67 said:
I have wrapped 3 or 4 commercial PTT Sdk frameworks for a fellow B4X User while he has set up everything else.
Maybe he has some advice or knows alternatives? I will send him a PM about this thread but I know he's a very busy man so no promises that he will get back to you.

As Mike said I was able to make my own server in B4J and client in B4A for push to talk and full duplex communication.
I tried first with commercial servers like ProPTT and WalkieFleet.
Mike made the libraries for their SDK.

Eventually we made our own server where UDP streams are shared .

The chatshared example from Erel is the example i used.

You make for example 50 UDP connections for 50 groups
Each client send a periodic ping so the port so you can store the return port number and sender id.
This ping also ensures the return path from server to client remains active.
When a audio packets comes to the server from a sender then it is distributed to all recipients in the ping table.

See www.commcheck.eu for final solution

Magma · Jun 23, 2020

@Philip Prins UDP over internet... will be safe ? ... +what about compression of audio ? + every stream will have different port ?

as i can understand the b4j server will be only for storing the ip and the ports of clients (streams) ? and how all these streams can play together... ?

That's mean a lot of bandwidth ? - or no ?

Philip Prins · Jun 23, 2020

Magma said:
@Philip Prins UDP over internet... will be safe ? ... +what about compression of audio ? + every stream will have different port ?

as i can understand the b4j server will be only for storing the ip and the ports of clients (streams) ? and how all these streams can play together... ?

That's mean a lot of bandwidth ? - or no ?

UDP works well for audio and video.
TCP is also possible.

PCM works well on 3G and 4G.
For 2G opus codec is needed

The server listens on port 10001 for example.
All clients connect to that port and get a different return port by the server.
This return port have to saved to a table.
When one client sends a UDP packet it will be send to all recipients in the table.

TILogistic · Jun 23, 2020

Philip Prins said:
UDP works well for audio and video.
TCP is also possible.

PCM works well on 3G and 4G.
For 2G opus codec is needed

The server listens on port 10001 for example.
All clients connect to that port and get a different return port by the server.
This return port have to saved to a table.
When one client sends a UDP packet it will be send to all recipients in the table.

Yes. UDP or TCP both are possible

Android Question Room Chat Audio

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