XYNCoder is an all audio/video formats to MP4 batch encoding frontend.
It supports two target profiles:

• Unrestricted: Encoded video can be played back by popular desktop video players
  
• Nokia NSeries: Encoded video can be played back on Nokia NSeries mobile phones(feature not tested on all models)

It can convert any audio or video file, that can be played back by MPlayer, to MP4.
It uses the x264(mencoder) for video and aac(neroaacenc) for audio encoding. It can use AviSynth(optionally) to perform any preprocessing on the source. Also it can be used as a standalone encoding frontend for NeroAacEnc.

Just add the files to be encoded, specify the encoding settings and hit 'Encode'. XYNCoder will run the required processes in background with low priority so you can perform other important tasks while encoding. Also, encoding can be paused/resumed as required.

1.3

Added auto-updater. Detects when a new version is available on the web and allows to update.

1.2

Removed 2pass encoding.

Now supports one pass mode only, replaced quantizer setting by quality slider.

Added pause/resume support.

1.1

Support for Nokia-N95

1.0

Initial release

Support for 2pass, 1pass encoding to mp4

Note:
Make sure that all the following are placed in the same directory as the XYNCoder binary - mencoder.exe, mplayer.exe, mp4box.exe, neroaacenc.exe, normalize.exe