[SR-Users] Need help in transforming an SDP string through a re.subst

[Henning Westerholt]

Hi Denys,

not sure what you mean by ‘#’ character. The #015#012 in the dumped SDP is just a placeholder for \r\n, which is otherwise not printable.

So, it looks more like a regular expression question, not specific to Kamailio. You can apply regular expressions with the ‘re’ operation, there is also a regexp module I think.

Cheers,

Henning

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From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Denys Pozniak
Sent: Monday, March 1, 2021 5:12 PM
To: Daniel-Constantin Mierla <miconda at gmail.com>
Cc: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] Need help in transforming an SDP string through a re.subst

Hello!

Thanks for the answer.
But if we abstract, it’s an SDP. How to transform a string containing # character?


пн, 1 мар. 2021 г. в 13:05, Daniel-Constantin Mierla <miconda at gmail.com<mailto:miconda at gmail.com>>:

Hello,

there should be a function to remove a line from sdp by matching on its prefix (in sdpops?!?), might be easier to use that one.

Cheers,
Daniel
On 23.02.21 19:51, Denys Pozniak wrote:
Hello!

There is a task to remove a fragment (a=rtpmap:8 PCMA/8000#015#012) from the SDP string generated by the rtpengine.

v=0#015#012o=kw 1614043485 1614043486 IN IP4 185.19.237.77#015#012s=kw#015#012c=IN IP4 1.1.1.1#015#012t=0 0#015#012m=audio 31828 RTP/AVP 0 8 101#015#012a=silenceSupp:off - - - -#015#012a=direction:both#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=sendrecv#015#012a=rtcp:31829#015#012a=ptime:20#015#012

The most logical option seems to be using the re.subst transformation, but so far no success.
$avp(write_sdp_pv) = $(avp(write_sdp_pv){re.subst,/a=rtpmap:8 PCMA\/8000%23015%23012//s});

Сan there be an alternative or am I doing something wrong with the re.subst?

--

BR,
Denys Pozniak




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BR,
Denys Pozniak


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