• Easy access to all FFmpeg codecs and basic encode settings.
• All advanced FFmpeg options are available through user command addition.
• All settings are saved and restored at the next session.
• All encoder settings, user additions and scripts can be saved in template files.
• Display of estimated encode time, remaining time and encode speed.
• Option to set encode time limit (in minutes) to encode test clips.
• Option to auto-shutdown your system after encoding and job processing.
• Re-direction of FFmpeg screen output to Avanti GUI (hides FFmpeg).
• Option to process system controlled 2-pass encoding.
• Advanced batch job processing (with dynamic template support).
• ES option to encode to mpeg2 elementary audio/video streams for DVD authoring.
• Option to modify mpeg2 header flags (incl. 2:3 pulldown on 23.976 p).
• Option to modify AVI header fields (FourCC and frame rate).
• Selectable Avisynth AUTO and USER modes with build-in Avisynth Editor.
  ... (supports relative source paths that allow scripts to run from templates).
• Internal Video Preview with Avisynth script preview (debug) option.
• Option to use advanced Avisynth color correction (with preview).
• Selectable FFmpeg/Avisynth crop/scale/pad option (with preview and calculator).
• Option to burn-in subtitles (with style editor and preview).
• Support for the VirtualDub (*.vdr) frameserver format.
• Option to convert PAL video source to NTSC destination and vice-versa.
• Option to convert audio from PAL to NTSC and vice-versa (with pitch correction).
• Option to expand luminance level from 16-235 to 0-255.
• Avisynth SuperEQ (18 bands) preset editor with preview option.

FFmpeg is not included in the package, you have to download it separately.
You can get a free build here
  
Also look here for more sites that provide FFmpeg win32 builds: Links

ATTENTION !
  
Because of command syntax changes in the FFmpeg source code, Avanti versions
older then 0.2.9 need a template update when used with FFmpeg Win32 builds from
version SVN-r15263 up. Read more about it and download a update zip here

Although optional, we highly recommend to install Avisynth (version 2.5.7 up)
to take advantage of all build-in Avanti/Avisynth options. You can download
the latest Avisynth version here
  
The subtitle option (new in version 0.2.9) requires you have the "VSFilter.dll"
plugin in your Avisynth plugins folder. You can download this plugin here

The Avanti package and some of the FFmpeg builds are packed with 7-Zip.
If you have problems with unpacking, you can download 7-Zip here

Report any problems, suggestions, questions to the Avanti thread at videohelp here.
Keep in mind this is simply a front-end, errors are more likely to come from the engine behind the gui, ie FFmpeg.

This Web Site is provided to you free of charge, "as is,". All content within them are provided on an "as is" and
"as available" basis without any warranties of any kind, whether express or implied, including, but not limited
to the implied warranties of merchantability, fitness for a particular purpose, and non-infringement. Any material
downloaded or otherwise obtained through this Web Site is done at your own risk and discretion and you will be
solely responsible for any damage to your computer system or loss of data that results from the downloading
or use of any such material.