Zac

ffmpeg.exe -i D:\MatrixTest\24FPS.mp4 -vcodec libx264 -r 12 12FPS.mp4

ffmpeg version N-34318-g8475ec1, Copyright (c) 2000-2011 the FFmpeg developers
  built on Oct 31 2011 17:50:05 with gcc 4.6.1
  configuration: --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil    51. 22. 0 / 51. 22. 0
  libavcodec   53. 26. 0 / 53. 26. 0
  libavformat  53. 18. 0 / 53. 18. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 45. 3 /  2. 45. 3
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\MatrixTest\24FPS.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01 00:00:00
    title           : 2010-03-24_13-00-40_0001-0004_L
    date            : 2010-03-24 13:00:40
    encoder         : Lavf53.18.0
    comment         : Encoded by AG Video Encode Version: 1.0.0
  Duration: 00:00:04.16, start: 0.000000, bitrate: 6374 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1176x600, 6371 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    :
File '12FPS.mp4' already exists. Overwrite ? [y/N] w:1176 h:600 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
[libx264 @ 01B079A0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 01B079A0] profile High, level 3.1
[libx264 @ 01B079A0] 264 - core 118 r2085 8a62835 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=12 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=12 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
strptime() unavailable on this system, cannot convert the date string.
Output #0, mp4, to '12FPS.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01 00:00:00
    title           : 2010-03-24_13-00-40_0001-0004_L
    date            : 2010-03-24 13:00:40
    comment         : Encoded by AG Video Encode Version: 1.0.0
    encoder         : Lavf53.18.0
    Stream #0:0(und): Video: h264 (![0][0][0] / 0x0021), yuv420p, 1176x600, q=-1--1, 12 tbn, 12 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    :
Stream mapping:
  Stream #0.0 -> #0.0 (h264 -> libx264)
Press [q] to stop, [?] for help
frame=   26 fps=  0 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=0 drop=22
frame=   46 fps= 39 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=0 drop=43
frame=   52 fps= 17 q=-1.0 Lsize=     470kB time=00:00:04.16 bitrate= 923.6kbits/s dup=0 drop=48

video:468kB audio:0kB global headers:0kB muxing overhead 0.365136%
[libx264 @ 01B079A0] frame I:2     Avg QP:20.58  size: 29062
[libx264 @ 01B079A0] frame P:20    Avg QP:22.15  size: 14590
[libx264 @ 01B079A0] frame B:30    Avg QP:24.16  size:  4288
[libx264 @ 01B079A0] consecutive B-frames: 15.4% 15.4% 23.1% 46.2%
[libx264 @ 01B079A0] mb I  I16..4: 30.4% 52.6% 17.0%
[libx264 @ 01B079A0] mb P  I16..4:  5.5% 11.3%  3.7%  P16..4: 42.1% 13.8%  6.5%  0.0%  0.0%    skip:17.0%
[libx264 @ 01B079A0] mb B  I16..4:  0.4%  0.5%  0.1%  B16..8: 47.5%  4.2%  0.6%  direct: 1.2%  skip:45.6%  L0:46.7% L1:50.9% BI: 2.4%
[libx264 @ 01B079A0] 8x8 transform intra:54.0% inter:82.3%
[libx264 @ 01B079A0] coded y,uvDC,uvAC intra: 62.8% 75.7% 27.6% inter: 18.6% 22.7% 0.3%
[libx264 @ 01B079A0] i16 v,h,dc,p: 36% 25%  6% 34%
[libx264 @ 01B079A0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 19% 15%  6%  6%  7%  6%  8%  7%
[libx264 @ 01B079A0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 24%  9%  6%  7%  7%  6%  6%  4%
[libx264 @ 01B079A0] i8c dc,h,v,p: 37% 26% 30%  7%
[libx264 @ 01B079A0] Weighted P-Frames: Y:10.0% UV:0.0%
[libx264 @ 01B079A0] ref P L0: 57.5% 19.8% 14.7%  7.2%  0.8%
[libx264 @ 01B079A0] ref B L0: 87.5% 10.9%  1.6%
[libx264 @ 01B079A0] ref B L1: 93.8%  6.2%
[libx264 @ 01B079A0] kb/s:883.50