[Freeswitch-dev] Audio formats without transcoding

[Michael Collins]

That's a reasonable expectation. However, if there is more than one file
format from which the sound could be played then a decision must be made as
to which one to use. You could default to .wav and hope that there's a .wav
file present or you could create a logic tree that looks for various file
types and chooses the most appropriate under the circumstances. Most likely
you'd need more than just a channel variable - you'd need to do a small
script in your preferred language, be it Lua, Perl, Python, JavaScript...

-MC

On Fri, Jan 2, 2009 at 7:38 AM, Mikael A. Bjerkeland
<mikael at bjerkeland.com>wrote:

> Hmm, what about setting a channel variable to change this behaviour? I
> might be off track, but shouldn't the file be transcoded if that's the
> only way to play it?
>
>
> El vie, 02-01-2009 a las 07:09 -0800, Michael S Collins escribió:
> > From my experience if the native file format is not found then it
> > will not play anything, but will show a file not found error.
> >
> > -MC
> >
> > Sent from my iPhone
> >
> > On Jan 2, 2009, at 3:38 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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