ffmpeg -i test.mp4 -ss 00:00:00 -t 6.066 -vf scale=480:480 -vco                                             dec h264 test2.mp4
ffmpeg version N-58443-g7f11c53 Copyright (c) 2000-2013 the FFmpeg developers
  built on Nov 25 2013 10:46:07 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
  configuration: --enable-version3 --enable-libopencore-amrnb --enable-libopenco                                             re-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora                                              --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-post                                             proc --enable-nonfree --extra-ldflags=-ldl
  libavutil      52. 54.100 / 52. 54.100
  libavcodec     55. 44.100 / 55. 44.100
  libavformat    55. 21.101 / 55. 21.101
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 91.100 /  3. 91.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
    major_brand     : 3gp5
    minor_version   : 1
    compatible_brands: 3gp53gp4
  Duration: 00:00:06.07, start: 0.000000, bitrate: 1108 kb/s
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 480x4                                             80, 1068 kb/s, 29.84 fps, 100k tbr, 100k tbn, 200k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 34 k                                             b/s (default)
    Metadata:
      handler_name    : SoundHandler
[mp4 @ 0x1dcd7a0] Frame rate very high for a muxer not efficiently supporting it                                             .
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 0x1d25fa0] MB rate (90000000) > level limit (2073600)
[libx264 @ 0x1d25fa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x1d25fa0] profile High, level 5.2
[libx264 @ 0x1d25fa0] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Co                                             pyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 de                                             block=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 chr                                             oma_qp_offset=-2 threads=12 lookahead_threads=2 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=25 scen                                             ecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmi                                             n=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libfaac @ 0x1d265e0] libfaac doesn't support the specified bitrate, using 96kbi                                             t/s instead
Output #0, mp4, to 'test2.mp4':
  Metadata:
    major_brand     : 3gp5
    minor_version   : 1
    compatible_brands: 3gp53gp4
    encoder         : Lavf55.21.101
    Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 4                                             80x480, q=-1--1, 100k tbn, 100k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 16000 Hz, m                                             ono, s16, 96 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (aac -> libfaac)
Press [q] to stop, [?] for help
frame=40601 fps=407 q=33.0 size=    9155kB time=00:00:01.47 bitrate=50947.9kbits/s dup=40589 drop=0