title: Unrecognized option 'c:v' ffmpeg error for converting videos to H264
body: <p>I told my server to upgrade to latest version of ffmpeg and they told me they did and I have the latest version that is 2.2.1 . 
  I test several codes to convert a video to x264 , here is the one ;</p>
  
  <pre><code>passthru("$ffmpegpath -i aatest/a.AVI -c:v libx264 -c:a libfaac -preset veryslow -qp 0 aatest/output.mp4 2&gt;&amp;1");
  </code></pre>
  
  <p>the result</p>
  
  <blockquote>
    <p>FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
    built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat
    4.4.5-6) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2
    libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0
    libavfilter 1.19. 0 / 1.19. 0 libswscale 0.11. 0 / 0.11. 0 libpostproc
    51. 2. 0 / 51. 2. 0 [mpeg4 @ 0x1111960]Invalid and inefficient vfw-avi packed B frames detected [mpeg4 @ 0x1111960]frame skip 8 Input #0,
    avi, from 'aatest/a.AVI': Duration: 00:02:04.04, start: 0.000000,
    bitrate: 885 kb/s Stream #0.0: Video: mpeg4, yuv420p, 480x360 [PAR 4:3
    DAR 16:9], 25 tbr, 25 tbn, 25 tbc Stream #0.1: Audio: mp3, 44100 Hz, 2
    channels, s16, 128 kb/s Unrecognized option 'c:v'</p>
  </blockquote>
  
  <p>the last line says "Unrecognized option 'c:v'"</p>
  
  <p>What should I do ? 
  Thanks</p>