ffmpeg -re -f v4l2 -i /dev/video0 -s 320x240 -r 29.97 \
    -vcodec libx264 -pix_fmt yuv420p -s 320x240 \
    -c:v libx264 -crf 27 \
    -tune zerolatency -profile:v baseline -level 30 -flags +global_header \
    -f rtp rtp://127.0.0.1:4008 > test.sdp

##WORKS
ffplay rtp://localhost:4008

##copying test.sdp to another machine and running
ffplay -i test.sdp

produces an error:

Could not find codec parameters for stream 0 (Video: h264): unspecified size
Consider increasing 'analyzeduration' and 'probesize'

the contents of
test.sdp:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.1.6
t=0 0
a=tool:libavformat 55.4.101
m=video 4008 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LAHtkBQfoQAAAGQAABdqjxYuSA,aMuFLIA=; profile-level-id=42C01E

complete output of the command
$ ffplay -i test.sdp -analyzeduration 99999 -debug 5

output:
ffplay -i test.sdp -analyzeduration 9999 -debug 5
ffplay version git-2013-05-13-4383e1b Copyright (c) 2003-2013 the FFmpeg developers
  built on May 13 2013 16:04:47 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3 --enable-libopus
  libavutil      52. 30.100 / 52. 30.100
  libavcodec     55.  9.100 / 55.  9.100
  libavformat    55.  7.100 / 55.  7.100
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 65.100 /  3. 65.100
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[sdp @ 0xb2401980] Format sdp probed with size=2048 and score=500
[sdp @ 0xb2401980] video codec set to: h264
[NULL @ 0xb24005e0] RTP Packetization Mode: 1
[NULL @ 0xb24005e0] Extradata set to 0xb2402500 (size: 34)!
[NULL @ 0xb24005e0] RTP Profile IDC: 42 Profile IOP: c0 Level: 1e
[sdp @ 0xb2401980] File position before avformat_find_stream_info() is 258
[h264 @ 0xb24005e0] sps:0 profile:66/30 poc:2 ref:3 20x15 FRM 8B8 crop:0/0/0/0 VUI 420 100/5994 b8 reo:-1
[h264 @ 0xb24005e0] pps:0 sps:0 CAVLC slice_groups:1 ref:3/1  qp:27/26/-2/-2 LPAR
[h264 @ 0xb24005e0] sps:0 profile:66/30 poc:2 ref:3 20x15 FRM 8B8 crop:0/0/0/0 VUI 420 100/5994 b8 reo:-1
[h264 @ 0xb24005e0] pps:0 sps:0 CAVLC slice_groups:1 ref:3/1  qp:27/26/-2/-2 LPAR
[sdp @ 0xb2401980] Could not find codec parameters for stream 0 (Video: h264): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[sdp @ 0xb2401980] File position after avformat_find_stream_info() is 258
test.sdp: could not find codec parameters
[AVIOContext @ 0xb24004a0] Statistics: 258 bytes read, 0 seeks