I use MediaCoder for most of my encoding/transcoding of video for playback on my PC and other devices. The N800 has a peculiar set of parameters for it’s video - if it doesn’t match up then it either won’t play back or will be very choppy.

I ended up selling the N800 but I thought I would pass this profile along to anyone who might use it.

<?xml version="1.0" encoding="UTF-8"?>
<MediaCoderPrefs>
  <node key="overall">
    <node key="generic">
      <node key="autoRevert">
        <value>Never</value>
      </node>
    </node>
    <node key="ui">
      <node key="optionTab">
        <value>3</value>
      </node>
      <node key="param">
        <value>1069,767,47,50</value>
      </node>
      <node key="noWelcome">
        <value>4068</value>
      </node>
    </node>
    <node key="task"/>
    <node key="output"/>
    <node key="tagging"/>
    <node key="subtitle"/>
    <node key="decoding"/>
    <node key="audio"/>
    <node key="video">
      <node key="format">
        <value>XviD</value>
      </node>
    </node>
    <node key="container">
      <node key="format">
        <value>AVI</value>
      </node>
    </node>
    <node key="mplayer"/>
    <node key="preview"/>
    <node key="plugin"/>
    <node key="presets"/>
    <node key="httpd"/>
    <node key="server"/>
  </node>
  <node key="audiosrc">
    <node key="mplayer"/>
    <node key="winamp"/>
    <node key="lame"/>
    <node key="wavefile"/>
  </node>
  <node key="audioenc">
    <node key="lame"/>
    <node key="vorbis"/>
    <node key="faac"/>
    <node key="aacplus"/>
    <node key="nero"/>
    <node key="helix"/>
    <node key="helixmp3"/>
    <node key="fraunhofer"/>
    <node key="speex"/>
    <node key="musepack"/>
    <node key="ffmpeg"/>
    <node key="aac3gpp"/>
    <node key="amr"/>
    <node key="wavpack"/>
    <node key="flac"/>
    <node key="ape"/>
    <node key="tta"/>
    <node key="als"/>
    <node key="ofr"/>
    <node key="pcm"/>
    <node key="cli"/>
  </node>
  <node key="videosrc">
    <node key="mplayer"/>
    <node key="avisynth"/>
  </node>
  <node key="videoenc">
    <node key="xvid"/>
    <node key="x264"/>
    <node key="mencoder"/>
    <node key="ffmpeg"/>
    <node key="theora"/>
    <node key="dirac"/>
    <node key="amv"/>
    <node key="vfw"/>
    <node key="dumper"/>
    <node key="wm"/>
    <node key="remote"/>
  </node>
  <node key="container">
    <node key="mp4box"/>
    <node key="matroska"/>
    <node key="mencoder"/>
    <node key="mp4creator"/>
    <node key="atom"/>
    <node key="pmp"/>
    <node key="vcd"/>
  </node>
  <node key="audiofilter">
    <node key="resample"/>
    <node key="equalizer"/>
    <node key="channels"/>
    <node key="volume"/>
    <node key="surround"/>
    <node key="compressor"/>
    <node key="delay"/>
    <node key="extraStereo"/>
    <node key="extra"/>
    <node key="shibatch"/>
  </node>
  <node key="videofilter">
    <node key="scale">
      <node key="enabled">
        <value>true</value>
      </node>
      <node key="width">
        <value>352</value>
      </node>
      <node key="height">
        <value>288</value>
      </node>
    </node>
    <node key="crop"/>
    <node key="expand"/>
    <node key="frame"/>
    <node key="eq"/>
    <node key="postproc"/>
    <node key="rotate"/>
    <node key="itf"/>
    <node key="denoise"/>
    <node key="unsharp"/>
    <node key="delogo"/>
    <node key="screenshot"/>
    <node key="thumb"/>
    <node key="extra"/>
  </node>
</MediaCoderPrefs>

You can also download the file here: N800.xml