[Freeswitch-dev] Multicast stream listener module

Anthony Minessale anthony.minessale at gmail.com
Mon Feb 22 11:42:36 PST 2010

because you have no signaling to negotiate payload types its best to limit
this to PCMU.
Your only other option is to use L16 (raw signed linear)

On Mon, Feb 22, 2010 at 5:53 AM, MohammedShehzad <pmhshz at gmail.com> wrote:

> Hello everybody,
> I am working on multicast listener format module, So that Freeswitch can
> listen on multicasted stream as example below:
> <action application="playback" data="rtp://"/>
> Please see on thread named 'stream a file multicast with mod_esf' on
> http://lists.freeswitch.org/pipermail/freeswitch-users/2010-February/026163.html
> I am testing that module against the audio multicasted by mod_esf module.
> I got some success with help of existing mod_native_file module, and I able
> to receive and play the multicasted RAW PCMU RTP (modified the skel of
> format module provided by brian), so that caller can hear the multicast by
> other Freeswitch server, but when i change the caller's codec from PCMU to
> something else, it breaks.
> Then I looked into mod_sndfile for decoding PCMU to other codec, but it
> seems that module is using libsndfile, which reads sound file directly and
> decode them to L16. If something similar to libsndfile is available, which
> work on stream instead of reading file, then it would surely work.
> Please Let me know your ideas on this, as I don't know how exactly
> Freeswitch encoding-decoding works?
> --
> -MohammedShehzad
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Anthony Minessale II

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