ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  built on Apr  2 2013 23:26:47 with Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[rtsp @ 0x7fbc4c006600] Estimating duration from bitrate, this may be inaccurate
Input #0, rtsp, from 'rtsp://192.168.88.100:554':
  Metadata:
    title           : VStream Live
    comment         : ICL Streaming Media
  Duration: N/A, start: 0.072000, bitrate: 32 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile), yuv420p, 1280x1024 [SAR 1:1 DAR 5:4], 15 tbr, 90k tbn, 15 tbc
    Stream #0:1: Audio: mp2, 16000 Hz, mono, s16p, 32 kb/s
Output #0, image2, to 'partial.jpg':
  Metadata:
    title           : VStream Live
    comment         : ICL Streaming Media
    encoder         : Lavf54.63.104
    Stream #0:0: Video: mjpeg, yuvj420p, 1280x1024 [SAR 1:1 DAR 5:4], q=2-31, 200 kb/s, 90k tbn, 15 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 -> mjpeg)
Press [q] to stop, [?] for help
[mpeg4 @ 0x7fbc4c96a400] warning: first frame is no keyframe
frame=    1 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.06 bitrate=N/A
video:33kB audio:0kB subtitle:0 global headers:0kB muxing overhead -100.065788%