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.