ffmpeg -re -r 20 -i /tmp/test.mpg http://ffserver.labs.g2-inc.net:8090/feed1.ffm

ffmpeg version 2.8.3 Copyright (c) 2000-2015 the FFmpeg developers
  built with Apple LLVM version 7.0.0 (clang-700.1.76)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mpeg, from '/tmp/test.mpg':
  Duration: 00:00:31.11, start: 0.541711, bitrate: 8 kb/s
    Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 16x16 [SAR 1:1 DAR 1:1], 104857 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 23.98 tbc
[libx264 @ 0x7fcd0b020000] using SAR=17/30
[libx264 @ 0x7fcd0b020000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fcd0b020000] profile High, level 2.1
[libx264 @ 0x7fcd0b020000] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=100 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=200 vbv_bufsize=200 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, ffm, to 'http://ffserver.labs.g2-inc.net:8090/feed1.ffm':
  Metadata:
    creation_time   : 2016-01-12 15:11:50
    encoder         : Lavf56.40.101
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 16x16 [SAR 1:1 DAR 1:1], q=2-31, 256 kb/s, 20 fps, 1000k tbn, 20 tbc
    Metadata:
      encoder         : Lavc56.60.100 rawvideo
    Stream #0:1: Video: msmpeg4v3 (msmpeg4), yuv420p, 532x240 [SAR 60:133 DAR 1:1], q=2-31, 256 kb/s, 20 fps, 1000k tbn, 15 tbc
    Metadata:
      encoder         : Lavc56.60.100 msmpeg4
    Stream #0:2: Video: mpeg4, yuv420p, 160x128 [SAR 4:5 DAR 1:1], q=2-31, 64 kb/s, 20 fps, 1000k tbn, 5 tbc
    Metadata:
      encoder         : Lavc56.60.100 mpeg4
    Stream #0:3: Video: h264 (libx264), yuv420p, 480x272 [SAR 17:30 DAR 1:1], q=-1--1, 100 kb/s, 20 fps, 1000k tbn, 24 tbc
    Metadata:
      encoder         : Lavc56.60.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg1video (native) -> rawvideo (native))
  Stream #0:0 -> #0:1 (mpeg1video (native) -> msmpeg4v3 (msmpeg4))
  Stream #0:0 -> #0:2 (mpeg1video (native) -> mpeg4 (native))
  Stream #0:0 -> #0:3 (mpeg1video (native) -> h264 (libx264))
Press [q] to stop, [?] for help
Past duration 0.749992 too large
Past duration 0.999992 too large
frame=  773 fps= 24 q=-0.0 Lq=2.0 q=2.0 q=-1.0 size=    1456kB time=00:00:39.00 bitrate= 305.8kbits/s dup=154 drop=769
video:1402kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.853811%
[libx264 @ 0x7fcd0b020000] frame I:5     Avg QP:13.09  size:  5004
[libx264 @ 0x7fcd0b020000] frame P:313   Avg QP:14.84  size:  1096
[libx264 @ 0x7fcd0b020000] frame B:609   Avg QP:19.25  size:   222
[libx264 @ 0x7fcd0b020000] consecutive B-frames:  8.5%  9.5%  6.5% 75.5%
[libx264 @ 0x7fcd0b020000] mb I  I16..4: 12.1% 71.8% 16.2%
[libx264 @ 0x7fcd0b020000] mb P  I16..4:  4.8% 12.5%  1.3%  P16..4: 29.1%  4.3%  1.9%  0.0%  0.0%    skip:46.1%
[libx264 @ 0x7fcd0b020000] mb B  I16..4:  0.8%  1.1%  0.0%  B16..8: 10.5%  0.5%  0.0%  direct: 4.7%  skip:82.4%  L0:33.9% L1:64.8% BI: 1.3%
[libx264 @ 0x7fcd0b020000] final ratefactor: 21.17
[libx264 @ 0x7fcd0b020000] 8x8 transform intra:66.3% inter:92.7%
[libx264 @ 0x7fcd0b020000] coded y,uvDC,uvAC intra: 22.5% 58.2% 22.0% inter: 3.2% 16.7% 0.5%
[libx264 @ 0x7fcd0b020000] i16 v,h,dc,p: 38% 32%  9% 21%
[libx264 @ 0x7fcd0b020000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 27% 35%  3%  4%  3%  5%  2%  4%
[libx264 @ 0x7fcd0b020000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 33% 20%  4%  7%  3%  5%  2%  2%
[libx264 @ 0x7fcd0b020000] i8c dc,h,v,p: 50% 30%  9% 10%
[libx264 @ 0x7fcd0b020000] Weighted P-Frames: Y:3.8% UV:3.8%
[libx264 @ 0x7fcd0b020000] ref P L0: 70.2%  5.0% 12.1% 12.0%  0.7%
[libx264 @ 0x7fcd0b020000] ref B L0: 85.6% 12.3%  2.1%
[libx264 @ 0x7fcd0b020000] ref B L1: 93.0%  7.0%
[libx264 @ 0x7fcd0b020000] kb/s:104.18