From owner-freebsd-questions@FreeBSD.ORG Fri Sep 16 03:52:58 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6B9CF106566B for ; Fri, 16 Sep 2011 03:52:58 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) Received: from relay2.tomsk.ru (relay2.tomsk.ru [212.73.124.8]) by mx1.freebsd.org (Postfix) with ESMTP id AB5018FC13 for ; Fri, 16 Sep 2011 03:52:57 +0000 (UTC) X-Virus-Scanned: by clamd daemon 0.93.1 for FreeBSD at relay2.tomsk.ru Received: from admin.sibptus.tomsk.ru (account sudakov@sibptus.tomsk.ru [212.73.125.240] verified) by relay2.tomsk.ru (CommuniGate Pro SMTP 5.1.13) with ESMTPSA id 20426673 for freebsd-questions@freebsd.org; Fri, 16 Sep 2011 10:52:55 +0700 Received: from admin.sibptus.tomsk.ru (sudakov@localhost [127.0.0.1]) by admin.sibptus.tomsk.ru (8.14.3/8.14.3) with ESMTP id p8G3qshm093775 for ; Fri, 16 Sep 2011 10:52:55 +0700 (OMSST) (envelope-from vas@mpeks.tomsk.su) Received: (from sudakov@localhost) by admin.sibptus.tomsk.ru (8.14.3/8.14.3/Submit) id p8G3qsK9093774 for freebsd-questions@freebsd.org; Fri, 16 Sep 2011 10:52:54 +0700 (OMSST) (envelope-from vas@mpeks.tomsk.su) X-Authentication-Warning: admin.sibptus.tomsk.ru: sudakov set sender to vas@mpeks.tomsk.su using -f Date: Fri, 16 Sep 2011 10:52:54 +0700 From: Victor Sudakov To: freebsd-questions@freebsd.org Message-ID: <20110916035254.GC92792@admin.sibptus.tomsk.ru> Mail-Followup-To: Victor Sudakov , freebsd-questions@freebsd.org References: <20110909062121.GA28440@admin.sibptus.tomsk.ru> <20110912055755.GA79151@admin.sibptus.tomsk.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Organization: AO "Svyaztransneft", SibPTUS X-PGP-Key: http://www.livejournal.com/pubkey.bml?user=victor_sudakov X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 Subject: Re: Need an audio multicasting solution X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Sep 2011 03:52:58 -0000 Alejandro Imass wrote: > > > > > A quick look at Icecast showed that it does not support multicast either. > > It this true? If so, Icecast is completely useless for my scenario. > > > > AFAIK very few media streamers (or none) actually support real IPv4 > (Class D) Multicast. They support what is known as "application > multicast" akin to a multi-process/multi-threaded Web server. > > I don't know much about real IPv4 Multicast but I've heard it's not > that easy to do in the real world and would probably require > coordination with your ISP unless you're multicasting in a private > networks. I use multicasting in a corporate network. > Again, IMHO because I've never even attempted multicasting. It's fun and very pleasing aesthetically :) At least on Cisco. As to the original question. I have had some success with multimedia/ffmpeg, at least this: ffmpeg -i file.mp3 -acodec copy -f rtp rtp://239.8.8.8:5000 -re does send a multicast stream which can be listened to with VLC (but not mplayer for some reason) on multiple hosts. Now I need to figure out how to stream live sound from /dev/dsp. All my attemps to record sound from a USB audio interface have resulted so far in a severely distorted growl instead of normal voice. Does anybody know how to figure out the sampling rate and other parameters of the sound card? "cat /dev/sndstat" does not output anything really useful. > > Why do you need multicasting anyway? To save bandwidth mostly, and it's fun to setup :). Taking into account that I have PIM working across all our WAN links (an in-house monitoring/alarm system relies thereupon), it would be nice to use this infrastructure for sound too. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru