Mensaje citado por Mayhem & Chaos Coordinator <[EMAIL PROTECTED]>:
Hi! > > I actually have obs on my company headquarters, where all my mates are > delighted > > (in fact they started to bring more and more CDs to work where y compress > them > > and put on the obs database, about 3100 songs!). We have several other > branches > > that interconnect to the headquarter's LAN using VPN on some cases, and FR > on > > others. > > Excellent! > > > I have researched a little, including that starmedia paper but so far I'm > lost. > > I guess what I should aim to is to integrate my multicast stream into the > > internet (mbone?) and then make the other branches to join it. Wonder with > all > > difficulties intermediate ISPs, etc, will this render this approach > impossible? > > Effectively, yes. I would not recommend doing any multicast over the > bare Internet -- its frought with problems. I finally gave up with this approach... > The proper way to solve this is to use icecast as a tunneling mechanism. > If you have an Obs box at location A, and you want to listen to the same > stream at location B, but A and B are seperated by the Internet, then > set up icecast as a tunnel. You'll need an icecast server at both points > -- just have the icecast server at point B propagate a stream from > icecast server A. > > However, this isn't quite what you want. Icecast does not do multicast, > so location B cannot use multicast. Also, location B will not be able to > listen to the same stream as location A -- you will need to set up > different channels. I went this route, and found that. No matter how I hack it, I wasn't able to stream/multicast the same channel. There's the other problem: I cannot once on B LAN multicast again the icecast stream. Do you remember my skipping/sound quality deterioration problems? I found that there's no problem at all if I use icecast, so your assumptions (udp lost packets) were surely right. I tried with two different cards known for doing multicast well (AFAIK) a eepro100 and a de21x4x with different drivers, same problem. It seems that with the latest version I have installed, checked out from the obs-ui branch (BTW, it seems to be missing a 'Lang' module or something, and couldn't make it work so that I could work out the es_ES locale as I promised) the problem happens a lot less, both the skewing and the pitch/phase shift on the stream decoded by no matter if freeamp on Linux or winamp on win32... I'm going to experiment a little further, setting up obs on a *BSD machine, as I'd swear my switches/HUBs are fine: I use norton ghost multicasting a lot and so far the performance is very very good... I'm pretty sure is either my linux setup or mi PC, that have never worked like it should, despite its Asus blah-blah mainboard, could be the problem. > That is, unless enough people bug me to fix obs so that you can listen > to a stream via multicast and icecast at the same time. add one to the list :) Another problem I'm facing is that all my mp3s are encoded at 128Kbps VBR with lame. The ADSL lines that interconnects some of the other branches are only 128 upstream, so they can't cope with the variable 128 Kbps stream. On the other hand, the obs reencoding branch uses lame libraries to do the reencoding; AFAIK lame isn't targeted to streams below 256Kbps CBR and really shines with high bitrates, starting at 128 VBR, so e.g. a 96Kbps reencoding will deteriorate the sound quality a lot. Blade suffers from the same. I dunno if any of the lame mutations will work better, suggestions anyone? Is there any solution to this? buffering? Will another icecast server on side B, on the tunnelling setup you describe, do the buffering? Having a say 2 minute shifted stream in time is better that no stream at all... :) thanks for everything and keep up the good work! *****---(*)---********************************************----------> Francisco J. Montilla - System & Network admin - Seville - Spain pacopepe>AT>insflug.org - irc: pukka - DJB fan DoQmail: qmail en castellano es.qmail.org - OpenSlink: insflug.org/slink _______________________________________________ Obs-dev mailing list [EMAIL PROTECTED] http://www.freeamp.org/mailman/listinfo/obs-dev
