[asterisk-dev] Audio to/from Asterisk

Andrew Nagy anagy at sangoma.com
Fri Jan 25 09:33:35 CST 2019

Nice job Sylvain and wazo team! This is exactly what we were talking about
at astricon this year!

On Fri, Jan 25, 2019 at 7:15 AM Sylvain Boily <sylvain at wazo.io> wrote:

> Hello,
> On 2018-10-16 3:18 p.m., Sylvain Boily wrote:
> > Hello,
> >
> > On 2018-10-15 3:29 p.m., Matt Fredrickson wrote:
> >> On Tue, Oct 9, 2018 at 12:09 PM Seán C. McCord <ulexus at gmail.com>
> wrote:
> >>> Because several people raised the issue at DevCon, I figured it may
> >>> be worth mentioning this: app_audiosocket.  I haven't submitted it
> >>> mainly due to the thought that no one else would fine it
> >>> interesting.  There exist other, similar ways to get audio out:
> >>> app_jack, app_unimrcp, etc.  I built this because of some special
> >>> needs, and it is very convenient due to its extremely light weight.
> >>>
> >>> Regardless, should anyone be interested, here it is:
> >>>
> >>> https://github.com/CyCoreSystems/audiosocket
> >>>
> >>> The idea is to create a TCP socket to somewhere, pass some extremely
> >>> simple metadata (a UUID), and broker audio between the channel and
> >>> the socket.  It is as simple as possible.
> >> For those who aren't aware, getting this pushed out to the -dev list
> >> was an AstriDevCon 2018 takeaway action item with regards to interop
> >> with web-based speech recognition APIs.  I'd love to see more
> >> discussion and work on this topic, as I think that there stands much
> >> to be improved in Asterisk to better interoperate with some of the
> >> major speech recognition vendors.
> >>
> >
> > Will be nice to have this on ARI, like GET /channels/channelId/stream.
> > We can help to develop this feature!
> We did a 3 days Wazo hackathon this week and we developed a module to
> get audio from a channel_id to a websocket in asterisk.
> Our project has been to get a realtime voice communication, send it to
> an STT and with the result to prioritize a call in a mini emergency call
> center before someone get the call. The source code of this project is
> on my github. [1]
> It works well but it's a proof of concept (no test). I will be nice to
> have input, tests and other suggestions to put it on Asterisk in the
> future. Actually, the concept is you open a websocket with a subprotocol
> channel-stream and a Channel-ID http header with the channel_id of the
> channel you want to have the stream. The module use audiohook in
> Asterisk, transcode and send it in PCM 16k to the websocket.
> We will also release all source code for this demonstration if someone
> want to test. In attachment a screenshot to help you to understand the
> result. (in french sorry)
> Thank you for your feedback or suggestions.
> Sylvain
> [1] https://github.com/sboily/wazo-hackathon-asterisk-stream-module
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