[Freeswitch-users] absolute_codec_string just process one codec

[Steven Ayre]

You are... but it's perhaps not a very well documented feature so you
can be forgiven...

The problem is that , separates variable assignments in {} and []
blocks. So what you're using is actually setting the following
variables:
    absolute_codec_string=PCMA at 8000h@20i at 64000b
    PCMU at 8000h@20i at 64000b=
    G729 at 8000h@20i at 8000b=
    leg_time_out=10
    process_cdr=b_only
which hopefully makes it obvious why it's only using the first codec.

It's a known problem (http://jira.freeswitch.org/browse/FS-2126) and
there *is* a workaround for it. There's a special syntax that lets you
use a character other than comma for separating the codec names. This
actually applies to any variable values that are set in the {} and []
blocks and the special character gets replaced by a comma during the
variable assignment.

The syntax is to put a prefix of ^^: at the start of the value and
replace the commas in the value with :
You can use any (almost) character you like though, it uses the one
after the initial ^^.

As a short example: [absolute_codec_string=^^:PCMU:PCMA]

For your example you'll want to pass in:
{absolute_codec_string=^^:PCMA at 8000h@20i at 64000b:PCMU at 8000h@20i at 64000b:G729 at 8000h@20i at 8000b,leg_time_out=10,process_cdr=b_only}

Since you appear to be getting that from a variable you'll probably
want to find some way of substituting the , for the :

-Steve



On 20 July 2011 10:11, Saeed Ahmed <saeedahmad1981 at gmail.com> wrote:
> Hi,
>
> If i set absoluteye_codec_string in dialplan with multiple codecs, like
> G729,PCMA,PCMU, then just first codec will be processed, rest will be
> ignored.
>
> Example: {absolute_codec_string=${ep_codec_string}, i even tried using it
> like: absolute_codec_string='${ep_codec_string}'
> or absolute_codec_string=\'${ep_codec_string}\'
> or absolute_codec_string=\\'${ep_codec_string}\\'
> (as suggested by bkw_ on IRC)
>
> Console log shows like that:
>
> EXECUTE sofia/profile/1234567 at 1.2.2.3
> bridge({absolute_codec_string=PCMA at 8000h@20i at 64000b,PCMU at 8000h@20i at 64000b,G729 at 8000h@20i at 8000b,leg_time_out=
> 10,process_cdr=b_only}[SupplierPrefix=]sofia/fstest/456789 at 7.2.1.4)
>
>
> 2011-07-20 11:03:59.448455 [DEBUG] switch_ivr_originate.c:1873 Parsing
> global variables
> 2011-07-20 11:03:59.448455 [DEBUG] switch_event.c:1170 Parsing variable
> [absolute_codec_string]=[PCMA at 8000h@20i at 64000b]
> 2011-07-20 11:03:59.448455 [DEBUG] switch_event.c:1170 Parsing variable
> [leg_time_out]=[10]
> 2011-07-20 11:03:59.448455 [DEBUG] switch_event.c:1170 Parsing variable
> [process_cdr]=[b_only]
>
> Am i doing something wrong or should i open a JIRA?
>
>
> --
>
> Kind Regards
>
> Saeed Ahmed
>
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