[FFmpeg-devel] SDP file generated from ffmpeg RTP muxer does not work with DSS, why?

[habla man]

ffmpeg -re -an -i $input $res $video \
-flags +global_header -vglobal 1 -title "TEST" \
-f rtp rtp://127.0.0.1:55555 \
-vn $audio \
-f rtp rtp://127.0.0.1:44444 -newaudio \
> "/media/video/live.sdp"


SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
t=0 0
s=TEST
a=tool:libavformat 52.30.1
m=video 55555 RTP/AVP 96
c=IN IP4 127.0.0.1
b=AS:512
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1;
sprop-parameter-sets=BgX//wbcRem95tlIt5Ys2CDZI+7veDI2NCAtIGNvcmUgNjYgcjExMTUgMTE4NjNhYyAtIEgu
[LENGTH CUTOFF]
m=audio 44444 RTP/AVP 96
c=IN IP4 127.0.0.1
b=AS:96
a=rtpmap:96 MPEG4-GENERIC/48000/2
a=fmtp:96
profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;
config=1190

no response from rstp://192.168.1.50/test.sdp. What's the problem here?