[Freeswitch-dev] Audio formats without transcoding

[Mikael A. Bjerkeland]

Haven't thought of that. I suppose as you are asking this question since
sox doesn't support converting to or from G.722?

If that's the case and you figure out how we could do this please let me
know.


El vie, 02-01-2009 a las 11:41 -0200, Juan Jose Comellas escribió:
> BTW, what are you planning to use to convert WAV files to G.722?
> 
> 
> On Fri, Jan 2, 2009 at 9:38 AM, Mikael A. Bjerkeland
> <mikael at bjerkeland.com> wrote:
>         Michael,
>         
>         let's say G722 isn't found, but .wav is, will FS revert to
>         using
>         the .wav file and transcode if the file extension is not
>         specified in
>         playback?
>         
>         I will be creating a script to convert any file using sox to
>         every
>         specified format so we can avoid transcoding as much as
>         possible.
>         The script will appear at
>         http://wiki.freeswitch.org/wiki/Mod_native_file anytime soon.
>         
>         
>         El mar, 09-12-2008 a las 08:34 -0800, Michael Collins
>         escribió:
>         
>         > 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:
>         > http://www.iana.org/assignments/media-types/audio/
>         >
>         > so if you have these files:
>         > /tmp/hello.wav
>         > /tmp/hello.pcmu
>         > /tmp/hello.gsm
>         > /tmp/hello.g729
>         >
>         > 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.
>         >
>         > -MC
>         >
>         > 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?
>         > >
>         > >
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