[SR-Users] RTPengine - Transcoding example available?

[Denys Pozniak]

But I use *rtpengine_answer("codec-mask-opus codec-transcode-PCMA")* and as
I understand it should mask opus in OK and enable transcoding to PCMA.
"Change your config in side A to take only PCMA effective." - yes, I tested
and it works well, but it is out of my scenario.

On 20 February 2018 at 14:54, Gopalakrishnan N <saigop at gmail.com> wrote:

> Yes correct. RTP is good since the OPUS codec is available in both the
> sides its getting negotiated. Change your config in side A to take only
> PCMA effective.
>
> On Tue, 20 Feb 2018 at 18:05 Denys Pozniak <denys.pozniak at crazycall.com>
> wrote:
>
>> Thank you for the answer, but from "SDP" point of view everything looks
>> OK, I think issue is with my config or transcoding engine:
>>
>> Side A INVITE-> Proxy/Rtpengine:
>>
>> v=0
>> o=- 3543840537 1 IN IP4
>> s=SIPPER for PhonerLite
>> c=IN IP4 side_a
>> t=0 0
>> m=audio 55062 RTP/AVP 107 8
>> a=rtpmap:107 opus/48000/2
>> a=rtpmap:8 PCMA/8000
>> a=ssrc:1792443851
>> a=sendrecv
>>
>> Proxy/Rtpengine OK -> Side A:
>>
>> v=0
>> o=- 3728121777 3728121778 IN IP4
>> s=pjmedia
>> b=AS:50
>> t=0 0
>> a=X-nat:0
>> m=audio 30254 RTP/AVP 8
>> c=IN IP4 rtpengine
>> b=TIAS:32000
>> a=rtpmap:8 PCMA/8000
>> a=sendrecv
>> a=rtcp:30255
>>
>> So here must be PCMA in direction from  Proxy/Rtpengine -> Side A, but I
>> have opus.
>>
>>
>>
>>
>>
>>
>>
>> On 20 February 2018 at 12:41, Gopalakrishnan N <saigop at gmail.com> wrote:
>>
>>> Hi Denys,
>>>
>>> Am not much user of Kamilio, but am from Telecom background. The reason
>>> for your case is, in side A you have OPUS and in side B already OPUS is
>>> available and since both has the same codec as first priority it will
>>> negotiate itself with same codec and then it will look for other priority.
>>> Remove OPUS from side A and it will automatically go into transcoding mode.
>>>
>>> On Tue, 20 Feb 2018 at 16:17 Denys Pozniak <denys.pozniak at crazycall.com>
>>> wrote:
>>>
>>>> Hello!
>>>>
>>>> Please explain how to achive next:
>>>>
>>>> Side A supports:
>>>> OPUS
>>>> PCMA
>>>>
>>>> Side B supports:
>>>> OPUS
>>>> PCMA
>>>> PCMU
>>>>
>>>> I need to transcode in direction A->B from PCMA to OPUS?
>>>> So should be like this:
>>>> A(PCMA) -> (PCMA)Rtpengine(OPUS)->B(OPUS)
>>>>
>>>> I configured like this:
>>>> rtpengine_offer("codec-mask-PCMA codec-transcode-opus");
>>>> rtpengine_answer("codec-mask-opus codec-transcode-PCMA");
>>>>
>>>> But leg from Rtpengine to A has wrong codec (OPUS):
>>>> https://drive.google.com/file/d/14GAIt8lL7Igj9S95b_RS6CXtmGVhjLa1/view
>>>>
>>>>
>>>>
>>>>
>>>> On 19 February 2018 at 13:56, Richard Fuchs <rfuchs at sipwise.com> wrote:
>>>>
>>>>> On 2018-02-19 05:48 AM, Denys Pozniak wrote:
>>>>>
>>>>>> Hello!
>>>>>>
>>>>>> Small note.
>>>>>> In case of opus use: codec-transcode-opus (opus is lowercase).
>>>>>>
>>>>>
>>>>> As explained in the readme, the format generally follows the SDP
>>>>> format, including specifying sample rate and number of channels. As an
>>>>> additional parameter, the bitrate can be specified for codecs that support
>>>>> it.
>>>>>
>>>>> Examples:
>>>>>
>>>>> transcode-speex/32000
>>>>>
>>>>> transcode-opus/48000/2/64000
>>>>>
>>>>>
>>>>> Cheers
>>>>>
>>>>> _______________________________________________
>>>>> Kamailio (SER) - Users Mailing List
>>>>> sr-users at lists.kamailio.org
>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> BR
>>>> Denys Pozniak
>>>> _______________________________________________
>>>> Kamailio (SER) - Users Mailing List
>>>> sr-users at lists.kamailio.org
>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>>
>>> _______________________________________________
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>>>
>>
>>
>> --
>>
>> BR
>> Denys Pozniak
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>
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-- 

BR
Denys Pozniak
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