[Freeswitch-users] Transcoding to GSM using SOX

[Anthony Minessale]

Try reversing the order you load mod_sndfile and mod_voipcodecs and let me
know if it makes any diff.


On Mon, Nov 3, 2008 at 9:01 PM, Brian Wood <bwood-lists at jacosoft.com> wrote:

> I'm trying to transcode a .wav to a .gsm using SOX v14.0.1. What I get
> is a completely garbled when using playback in FreeSWITCH. I have
> verified that at least one other application (Quicktime Player) can in
> fact play the resulting .gsm file.
>
> I have tried the following:
>
>    sox william.wav -t gsm william.gsm
>    sox william.wav -t gsm -r 8000 william.gsm resample -ql
>    sox william.wav -t gsm -r 8000 -c1 william.gsm resample -ql
>
> And I am playing the file using:
>
>    originate sofia/internal/1000 at 192.168.1.1
> &playback(/home/user/william.gsm)
>
> Other formats such as uLaw and aLaw (-t ul and -t al, respectively) seem
> to work fine.
>
> Does anyone know of a set of parameters for SOX that will make this work?
>
> At the end of the day, I just want it to work, so if anyone can
> recommend any other known/good command line tools to encode GSM that
> would be fine too.
>
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-- 
Anthony Minessale II

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