[root@vmi55044 wmain]# ffmpeg -i new.mp4 -s 640x352 -b:v 984.615385k -preset ultrafast  newnew16MB.mp4
ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
  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
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'new.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2015-12-13 15:01:07
  Duration: 00:02:10.41, start: 0.000000, bitrate: 5338 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 5014 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2015-12-13 15:01:07
      handler_name    : Alias Data Handler
      encoder         : AVC Coding
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2015-12-13 15:01:07
      handler_name    : Alias Data Handler
[libx264 @ 0x2bedfc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x2bedfc0] profile Constrained Baseline, level 3.0
[libx264 @ 0x2bedfc0] 264 - core 148 r2 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=abr mbtree=0 bitrate=984 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'newnew16MB.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    encoder         : Lavf56.40.101
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x352, q=-1--1, 984 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2015-12-13 15:01:07
      handler_name    : Alias Data Handler
      encoder         : Lavc56.60.100 libx264
    Stream #0:1(eng): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 139 kb/s (default)
    Metadata:
      creation_time   : 2015-12-13 15:01:07
      handler_name    : Alias Data Handler
      encoder         : Lavc56.60.100 libfdk_aac
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
frame= 3259 fps= 64 q=-1.0 Lsize=   18089kB time=00:02:10.41 bitrate=1136.3kbits/s
video:15793kB audio:2224kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.404885%
[libx264 @ 0x2bedfc0] frame I:14    Avg QP:19.64  size: 27611
[libx264 @ 0x2bedfc0] frame P:3245  Avg QP:21.18  size:  4864
[libx264 @ 0x2bedfc0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x2bedfc0] mb P  I16..4:  6.6%  0.0%  0.0%  P16..4: 45.8%  0.0%  0.0%  0.0%  0.0%    skip:47.6%
[libx264 @ 0x2bedfc0] final ratefactor: 23.61
[libx264 @ 0x2bedfc0] coded y,uvDC,uvAC intra: 19.3% 30.0% 10.9% inter: 21.2% 15.1% 3.3%
[libx264 @ 0x2bedfc0] i16 v,h,dc,p: 45% 32% 14%  9%
[libx264 @ 0x2bedfc0] i8c dc,h,v,p: 54% 23% 18%  5%
[libx264 @ 0x2bedfc0] kb/s:992.40
[root@vmi55044 wmain]# du -h newnew16MB.mp4
18M     newnew16MB.mp4
[root@vmi55044 wmain]#