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Date:      Mon, 20 Jul 2020 16:00:22 -0700
From:      "Russell L. Carter" <rcarter@pinyon.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: forwarding audio from a (bhyve) vm
Message-ID:  <42870245-d3c6-be29-242b-67b7697d7402@pinyon.org>
In-Reply-To: <08284be8-6508-0451-312b-b575dc6d4331@pinyon.org>
References:  <295d43ec-b5dc-2899-5d22-fb0b5d8ff5cb@pinyon.org> <20200720120813.4b020a5b.freebsd@edvax.de> <08284be8-6508-0451-312b-b575dc6d4331@pinyon.org>

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On 2020-07-20 15:06, Russell L. Carter wrote:
> 
> Right.  Perfect, this is what I needed to um, 'hear'. ;-)
> Thank you.
> 
> Comments inline.
> 
> On 2020-07-20 03:08, Polytropon wrote:
>  > On Sun, 19 Jul 2020 19:10:09 -0700, Russell L. Carter wrote:
>  >> I have unifi-video up and running in a debian 9 bhyve vm.  What's the
>  >> current best practice for forwarding the audio from the bhyve vm?  I'd
>  >> like to be able to listen to the camera audio anywhere in my very
>  >> heterogeneous OS network.  My main desktop is FreeBSD, so that's what
>  >> I mainly need.  Is that possible?  Do the *vnc's do sound?
>  >>
>  >> What's the most efficient method?
>  >
>  > Maybe you can achieve this using virtual networking? There
>  > are solutions that use UDP for audio streaming (called "Seren"),
>  > or tunneling pulseaudio (if you're using it), or use XRDP with
>  > its pulseaudio plugin.
> 
> Seren looks perfect.  However it uses alsa to access the "sound card",
> which I see from googling should be achievable in a bhyve vm by
> configuring the HDA emulation. Evidently, after consulting
> https://wiki.freebsd.org/SummerOfCode2016/HDAudioEmulationForBhyve
> and
> https://forums.freebsd.org/threads/what-is-the-current-status-of-audio-emulation-in-bhyve.74557/ 
> 
> 
> I should be able to achieve this using vm-bhyve by setting
> 
> bhyve_options="-s 9,hda,play=/dev/dsp1,rec=/dev/dsp1"
> 
> in the vm template file.

Oh well, the vm fails to start with this template configuration.
I am not sure how to fix it.  There is only one vm running, so
I don't think bhyve should be running out of slots/devices.
There is no audio hardware in the bhyve host... is that a
problem?  I don't want to listen on the bhyve host, I want to
ship the audio over the physical network to another FreeBSD
system.

Both the bhyve host and the target system are running FreeBSD
12/stable from the beginning of July.

Russell


> (Although I have no idea why the forum post uses a "9" whereas
> the SummerOfCode post uses "x:y" for the first entry in the
> config list, I'm a bhyve noob).
> 
> I'll report if it works.
> 
> Thanks,
> Russell
> 
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