Hi!
Are there any features in K to remove a codec from the SDP? (execept manual removing with textops)?
thanks klaus
Hello Klaus,
No, there isn't. But it shouldn't be that hard to add one using the sdp parser from the core. Once the sdp is parsed, the lumps must be added (the relevant pointers to the codecs and attributes are already saved in the parsed sdp structure).
Regards, Ovidiu Sas
On Tue, Mar 31, 2009 at 9:12 AM, Klaus Darilion klaus.mailinglists@pernau.at wrote:
Hi!
Are there any features in K to remove a codec from the SDP? (execept manual removing with textops)?
thanks klaus
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2009/3/31 Ovidiu Sas osas@voipembedded.com:
Hello Klaus,
No, there isn't. But it shouldn't be that hard to add one using the sdp parser from the core. Once the sdp is parsed, the lumps must be added (the relevant pointers to the codecs and attributes are already saved in the parsed sdp structure).
Note that the only line to be modified is the "m=..." line, which specifies which codes are offered.
Example:
------------------------------- v=0 o=root 3836 3836 IN IP4 222.220.19.45 s=session c=IN IP4 222.220.19.45 b=CT:384 t=0 0 m=audio 12342 RTP/AVP 18 0 8 3 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:3 GSM/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv m=video 10482 RTP/AVP 34 103 99 a=rtpmap:34 H263/90000 a=rtpmap:103 h263-1998/90000 a=rtpmap:99 H264/90000 a=sendrecv -------------------------------
To dissable GSM in the above SDP the only modification would be:
m=audio 12342 RTP/AVP 18 0 8 101
On Tue, Mar 31, 2009 at 10:43 AM, Iñaki Baz Castillo ibc@aliax.net wrote:
2009/3/31 Ovidiu Sas osas@voipembedded.com:
Hello Klaus,
No, there isn't. But it shouldn't be that hard to add one using the sdp parser from the core. Once the sdp is parsed, the lumps must be added (the relevant pointers to the codecs and attributes are already saved in the parsed sdp structure).
Note that the only line to be modified is the "m=..." line, which specifies which codes are offered.
Example:
v=0 o=root 3836 3836 IN IP4 222.220.19.45 s=session c=IN IP4 222.220.19.45 b=CT:384 t=0 0 m=audio 12342 RTP/AVP 18 0 8 3 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:3 GSM/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv m=video 10482 RTP/AVP 34 103 99 a=rtpmap:34 H263/90000 a=rtpmap:103 h263-1998/90000 a=rtpmap:99 H264/90000 a=sendrecv
To dissable GSM in the above SDP the only modification would be:
m=audio 12342 RTP/AVP 18 0 8 101
That will work, but the proper thing to do would be to also remove the 'a=rtpmap:3 GSM/8000' line.
Regards, Ovidiu Sas
2009/3/31 Ovidiu Sas osas@voipembedded.com:
To dissable GSM in the above SDP the only modification would be:
m=audio 12342 RTP/AVP 18 0 8 101
That will work, but the proper thing to do would be to also remove the 'a=rtpmap:3 GSM/8000' line.
Sure, but It would be more complex :) and as far as I expect it shouldn't be required (never tested anyway).
-
Iñaki Baz Castillo -
Klaus Darilion -
Ovidiu Sas