[Icecast] Fwd: Re: Basic questions

[Ken Gillett]

Much appreciate your responses guys. I will have a read and look into the methods used and see what I can figure out. I will undoubtedly be back with more questions.



Ken  G i l l e t t

_/_/_/_/_/_/_/_/



> On 26 Apr 2021, at 04:54, Christian 'flash2' Fladung <cf at it-flash.de> wrote:
> 
> 
> 
> -------- Original Message --------
> Subject: Re: [Icecast] Basic questions
> Date: 2021-04-25 22:39
> From: Petr Pisar <petr.pisar at atlas.cz>
> To: icecast at xiph.org
> Reply-To: Icecast streaming server user discussions <icecast at xiph.org>
> 
> V Sun, Apr 25, 2021 at 08:43:26PM +0100, Ken Gillett napsal(a):
>> What I want to do is broadcast on my LAN (i.e. around the house) some
>> satellite radio streams, by which I mean stations that broadcast on FreeSat
>> (here in the UK). FTA and unencrypted. I have a satellite tuner card in the
>> mediaserver and I’d like to be able to access those radio streams (about
>> a dozen, max.) and make them available to any IP radio receiver (that should
>> be able to use Icecast streams).
>> The tuner card and Icecast would be on the same server and with no clients
>> listening, there would be no output onto the LAN and if those stations were
>> still ’streaming’ internally, that’s probably not an issue.
>> However, any suggestions as to how I could connect the Sat tuner output to
>> Icecast input? The Sat tuner is standards compliant (I believe, V4l?), but
>> I could run minisatip, so those stations would be accessible as standard
>> SAT>IP streams. But again, any suggestions how to make this connection
>> between the Sat tuner and Icecast?
> I have almost no experience with V4L2. So I cannot help you.
> 
> Here
> <https://unix.stackexchange.com/questions/113668/multiple-fm-radio-streams-from-dev-radio-via-v4l2-ices2-and-icecast>
> somebody reported that he uses IceS program to read sound from an ALSA device
> which is in real a virtual ALSA devices provided by a PulseAudio deamon which
> feeds the ALSA output with a PCM sound read from a /dev/radio0 character
> device provides by his V4L2 tunner. Then IceS compresses the PCM audio into
> a format of you choice (e.g. Vorbis) and forwards the compressed audio to
> an Icecast server.
> 
> I have some doubts whether this is the best option. In my opinion
> a satellite broadcasting uses an MPEG TS stream. Thus it should be possible
> just to repack the MPEG format from a MPEG TS container into ICY protocol
> without transcoding the audio. That should preserve quality of the sound and
> conserve a CPU power. If it is possible, then I bet somebody has already
> written such software. E.g. ffmpeg can be requested not to recompress with
> a "copy" codec. And here
> <https://gist.github.com/keiya/c8a5cbd4fe2594ddbb3390d9cf7dcac9> is ffmpeg
> used as a source for Icecast.
> 
> -- Petr
> 
> ====
> 
> Well, I do IT via pulseaudio and in the near past more with direct grabbing alsa device via gstreamer and libshout.
> IT is broken since Dezember and iam very sure that libshout here on Gentoo is broken.
> Maybe a fix after the actual release? ;)
> I pretty need grabbing alsa and send it via libshout / gstreamer to icecast.
> I'm also in the chat for questions.
> kkthx
> 
> ________