Hi all, A possibly simpler solution -- specially if you only stream in your own home -- could be to let liquidsoap also be the icecast server using output.harbor. The output has on_connect/on_disconnect callbacks that would be quite simple to use to count the number of listeners and make whatever change you see fit in your streams accordingly..
Romain 2015-05-29 15:47 GMT-05:00 Alex LaBranche <[email protected]>: > there are similar functions that are built into wowza server that behave this > way when using a source/edge setup. the edge server will sit idle until a > request is made (tune in), then it will pull from the source server. when > there are no more listeners connected to that particular stream, it will > disconnect. > > the problem you might run into here is with icecast (from what i can > remember) if there are no sources connected, you cant connect to the stream, > thus there is no way your stats will ever read more than 0 until a source > stream is provided. > > generally if your on a home ISP, the bandwidth used is very low… if this is > all over local LAN the network usage is also negligible... and reading a > single file for playback wont be thrashing a hard drive (unless the drive is > going bad or the file is huge and you have lots of other processes that are > heavy on disk i/o). the correct process would be to load the track into > memory and serve from there. > > since you are sourcing a stream out on the internet, why not simply tune in > directly to that stream from the node? when you are not listening, its not > using any bandwidth. > > if you are concerned about multiple nodes being tuned in at the same time, > you can set up a local relay (as it looks like thats what you’ve done with > liquidsoap. > > basically you would only need to tell liquidsoap ‘i want to start listening > now’, in one way or another so it will start pulling from the remote stream. > > its easy enough to write a script (or use one of the many out on the > internets) to check the listener stats of an icecast server and have > liquidsoap disconnect if there are 0 listeners. but off the top of my head > the best way to accomplish starting the stream when there are 0 listeners and > you want to listen is to manually tell liquidsoap to start or switch to a > live stream. such as a http GET request or a telnet command or whatever… > > > hope this helps a little… let us know what you come up with =] > > cheers > > >> On May 29, 2015, at 12:08 PM, Detrick Merz <[email protected]> wrote: >> >> Ah yes, it makes sense but is different from what I'm trying to do. I >> have an input stream or playlist that is (effectively) always >> available. That gets output out to a different icecast2 server. >> Ideally I'd like to temporarily stop the input stream or playlist and >> switch to something generated (maybe using the noise() or say() >> function) whenever the number of listeners connected to my icecast2 >> server drops to 0. No sense in wasting bandwidth by staying connected >> to an input.http() stream, or in thrashing a disk playing a local >> file, when there isn't actually anyone listening to it. >> >> Newer versions of icecast2 provide some nice status data in json >> format. My current thought is to use something like >> of_json(http.get("http://127.0.0.1:8000/status-json.xsl";)), parse out >> the "listeners":1, field, then make a decision in liquidsoap based on >> the value of that field. Of course I've oversimplified the >> of_json(http.get()) use, it doesn't exactly work like that ... >> http.get returns headers and such besides the json data, so that >> result would need to be filtered a bit before being sent to of_json(). >> I haven't quite wrapped my head around parsing the result from the >> http.get() yet, but it'll come. >> >> On Fri, May 29, 2015 at 2:50 PM, Sarah k Alawami <[email protected]> wrote: >>> Yeah. I modified the code in the cook book, section on harbor mount, to >>> suit my needs. So for me I have it branching in to 3, one day 4, streams >>> when I go live, then fall back to my playlist which is on a constant loop. >>> That playlist also branches out to the 3 streams. >>> >>> I hope that makes sence. >>>> On May 29, 2015, at 11:42 AM, Detrick Merz <[email protected]> wrote: >>>> >>>> If I understand right, your example will default to playing the live >>>> stream, but fallback to the playlist if the live stream stops coming >>>> in. Does that seem right? >>>> >>>> tnx de detrick >>>> >>>> On Tue, May 26, 2015 at 6:29 PM, Sarah k Alawami <[email protected]> >>>> wrote: >>>>> Ok, what I did was set up a harbor stream. here's my code with passwords >>>>> changed of corse. >>>>> >>>>> pasted.co/d63e0c67. >>>>> >>>>> On May 26, 2015, at 3:22 PM, Detrick Merz <[email protected]> wrote: >>>>> >>>>> In my case, I have a liquidsoap+icecast2 server. Liquidsoap presently >>>>> uses an Internet stream as an input, and outputs to icecast. Nodes >>>>> within my house connect to my local icecast server. When no nodes are >>>>> connected it seems like it would be polite to also have Liquidsoap >>>>> stop using the Internet stream as an input (since no humans are >>>>> actually listening to the stream). >>>>> >>>>> My thought would be something like switching to noise() or say(), or >>>>> something else that doesn't access the disk repeatedly, whenever the >>>>> number of listeners drops to 0. When at least one listener is >>>>> connected, switch back to re-streaming the Internet stream. >>>>> >>>>> On Tue, May 26, 2015 at 6:00 PM, Sarah k Alawami <[email protected]> >>>>> wrote: >>>>> >>>>> do you mean switch to an automation stream? or what. Can you maybe give >>>>> us >>>>> an example of what you want to do? Iv'e never heard of this but that does >>>>> not mean it's not out there. >>>>> >>>>> Take care. >>>>> >>>>> On May 26, 2015, at 2:06 PM, Detrick Merz <[email protected]> wrote: >>>>> >>>>> Before I go trying to reinvent the wheel, does anyone have a code >>>>> snippet that will default to noise() or something when the number of >>>>> active listeners drops to 0? It seems like the json status that newer >>>>> versions of icecast2 have should make this possible if I'm thinking >>>>> about it right. >>>>> >>>>> Thanks, >>>>> >>>>> -detrick >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> _______________________________________________ >>>>> Savonet-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/savonet-users >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> _______________________________________________ >>>>> Savonet-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/savonet-users >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> _______________________________________________ >>>>> Savonet-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/savonet-users >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> >>>>> _______________________________________________ >>>>> Savonet-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/savonet-users >>>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> _______________________________________________ >>>> Savonet-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/savonet-users >>> >>> >>> ------------------------------------------------------------------------------ >>> _______________________________________________ >>> Savonet-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/savonet-users >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Savonet-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/savonet-users > > > ------------------------------------------------------------------------------ > _______________________________________________ > Savonet-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/savonet-users ------------------------------------------------------------------------------ _______________________________________________ Savonet-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/savonet-users
