[Freeswitch-dev] Audio formats without transcoding

Michael Collins msc at freeswitch.org
Tue Dec 9 08:34:36 PST 2008

Unfortunately mod_native_file hasn't been documented on the wiki yet.
I'm going to work on that. However, the gist of it is this: if you
have a file in the proper format, such as g711, then you can specify
the file name w/o the extension and FreeSWITCH will pick the right one
for the codec being used. You'll need to make sure that your file
names have the proper extensions, like .pcmu for mu-law. A complete
list is available here:

so if you have these files:

you can specify the exact file name, in which case FS will play the
file and do whatever transcoding is needed. Or you can specify the
filename without the extension and FS will pick the appropriate one:

<action application="playback" data="/tmp/hello"/>

Look for an update on the wiki in the next day or two. In the meantime
please report back if you have any issues.


On Tue, Dec 9, 2008 at 7:24 AM, Michael Jerris <mike at jerris.com> wrote:
> yes, you can use mod_native_file.
> Mike
> On Dec 9, 2008, at 9:10 AM, Juan Jose Comellas wrote:
>> I need to support calls using G.711, G.729 and G.722 and I want to
>> avoid transcoding as much as possible. Does FreeSWITCH support playing
>> audios in a raw format that does not require transcoding for any of
>> these codecs? It looks like FS provides WAV audio files with the
>> frequencies of the supported codecs and relies on transcoding all the
>> time. Is my analysis correct? How does everybody else handle this
>> problem?
> _______________________________________________
> Freeswitch-dev mailing list
> Freeswitch-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org

More information about the Freeswitch-dev mailing list