ffmpeg -i /home/vallisrinivas/IMAX\ Deep\ Sea\ 3D\ 1080p\ Half-SBS\ AC3.mkv -vf mp=stereo3d -acodec copy -threads 10 -b:v 10000k -preset ultrafast -vcodec libx264 ~/test2.mkv
ffmpeg version 0.7.12, Copyright (c) 2000-2011 the FFmpeg developers
  built on Jun 13 2012 15:51:52 with gcc 4.5.2
  configuration: --prefix=/usr --enable-shared --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include --disable-stripping --enable-postproc --enable-gpl --enable-pthreads --enable-libtheora --enable-libvorbis --disable-encoder=vorbis --enable-libvpx --enable-x11grab --enable-runtime-cpudetect --enable-libdc1394 --enable-libschroedinger --enable-librtmp --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-libx264 --enable-nonfree --enable-libfaac --enable-libxvid
  libavutil    50. 43. 0 / 50. 43. 0
  libavcodec   52.123. 0 / 52.123. 0
  libavformat  52.111. 0 / 52.111. 0
  libavdevice  52.  5. 0 / 52.  5. 0
  libavfilter   1. 80. 0 /  1. 80. 0
  libswscale    0. 14. 1 /  0. 14. 1
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 0x7b40e0] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 95.90 (40000000/417083) -> 48.00 (48/1)
Input #0, matroska,webm, from '/home/vallisrinivas/IMAX Deep Sea 3D 1080p Half-SBS AC3.mkv':
  Duration: 00:40:49.76, start: 0.000000, bitrate: 64 kb/s
    Stream #0.0: Video: h264 (Constrained Baseline), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 47.95 fps, 48 tbr, 1k tbn, 95.90 tbc (default)
    Stream #0.1: Audio: ac3, 44100 Hz, stereo, s16, 64 kb/s (default)
Unrecognized option 'b:v'