[Freeswitch-users] Conference Bandwith parameter

Volodymyr Fedorov lexxua at gmail.com
Fri Mar 18 21:02:28 MSK 2016


Thanks Mike for answer, quite strange that freeswitch always answer with
b=AS:1024 for video stream.
Let me describe Invite from UA (Grandstream gvc3200) SDP:

v=0
o=ipod7 8000 8000 IN IP4 77.120.9.98
s=SIP Call
c=IN IP4 77.120.9.98
b=AS:1312
t=0 0
m=audio 5004 RTP/AVP 0 8 9 104 123 101
b=TIAS:64000
a=sendrecv
a=rtpmap:0 PCMU/8000
a=ptime:20
a=rtpmap:8 PCMA/8000
a=rtpmap:9 G722/8000
a=rtpmap:104 G7221/16000
a=fmtp:104 bitrate=32000
a=rtpmap:123 opus/48000/2
a=fmtp:123 useinbandfec=1; sprop-maxcapturerate=16000; stereo=0;
sprop-stereo=0
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
m=video 5006 RTP/AVP 99
b=TIAS:1024000
a=sendrecv
a=rtpmap:99 H264/90000
a=fmtp:99 profile-level-id=42801F; packetization-mode=1
a=framerate:15
a=content:main
a=label:11

FS respond part:
v=0
o=FreeSWITCH 1458296997 1458296998 IN IP4 77.121.1.26
s=FreeSWITCH
c=IN IP4 77.121.1.26
t=0 0
m=audio 26504 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
m=video 31298 RTP/AVP 99
b=AS:1024
a=rtpmap:99 H264/90000

What really confusing me are b=AS:1024 for Video rtp stream and absent
a=fmtp:99 profile-level-id=42801F; packetization-mode=1 in freeswitch
answer SDP.  Why I`m interesting because my device always starts with video
resolution 176x144. I tried with asterisk and it`s respond part looks like
this for video:
a=fmtp:99 profile-level-id=428028 and device starts to send 1920x1080. Now
I`m using Freeswitch Version 1.6.6 -13-d2d0b32 64bit from stable repo.


On Wed, Mar 16, 2016 at 9:17 PM, Michael Jerris <mike at jerris.com> wrote:

> Its only used in mod_conference, and I believe it will be adjusted via
> rtcp.
>
> On Mar 14, 2016, at 4:21 AM, Volodymyr Fedorov <lexxua at gmail.com> wrote:
>
> Hi, community!
> In wiki page
> https://freeswitch.org/confluence/display/FREESWITCH/mod_conference
> I found parameter for conf room: video-codec-bandwidth . It will be used
> as SDP respond part as a Bandwidth ("b=") from Freeswitch ?
> Thank you in advance
> --
> Best regards,
> Volodymyr
> _________________________________________________________________________
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>
>
> _________________________________________________________________________
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> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
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> http://confluence.freeswitch.org
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>
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-- 
Best regards,
Volodymyr
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