Hi Matt,
thank you for your inputs. I updated the page at
http://www.oinko.net/astrecipes/index.php?n=152 so that it merges in the
new pointers you sent me.
I also think that converting to the native codec format will be the best
choice - you can usually trade in some disk space for performance. In any
case, even having everything as WAV will require only a relatively cheap
encoding, and not the full mp3 -> slin -> {your codec} encoding plus the
external process that mpg123 used to require.
I wonder: is there any way to use Asterisk as a transcoding tool, i.e.
using its internal transcoding capabilities to transcode a given file to
all its supported codecs? (I'm thinking of g729 and ilbc, things that are
not supported by Sox but that might be useful in a real-life scenario....)
Thank you
l.
In data Mon, 13 Mar 2006 19:29:57 +0100, Matt Roth <mroth (at) imminc.com> ha
scritto:
Lenz,
This method is referred to as file-based or native MOH, and I have some
additional information regarding it. First, a short post on why we
moved from the rawplayer method to native MOH on our production box,
with a quote from Kevin Fleming regarding the impact the change would
have on scalability.
-
http://lists.digium.com/pipermail/asterisk-users/2006-February/141180.html
Second, I *believe* (please correct me if I'm wrong) that in order to
get the full benefits of native MOH, the music files should be converted
to the codec that the calls will be in. This allows Asterisk to play
MOH without performing any transcoding, which lowers the resource
utilization on the box. Here is a guide for converting WAV files to the
desired codec, which addresses the four characteristics that describe
audio data.
- http://lists.digium.com/pipermail/asterisk-users/2006-March/142108.html
Please feel free to add any of this information to your site and don't
hesitate to contact me if you spot any mistakes.
Thank you,
Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer
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