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Avanti GUI is a free front-end for FFmpeg with the option to insert Avisynth as pre-processor.
It can be used with almost all Windows OS builds of FFmpeg. It offers user friendly control over all basic and advanced FFmpeg options. A number of template examples are included. No need to be familiar with Avisynth to use the predefined Avanti/Avisynth pre-processor options. Avanti doesn't installs itself and runs from any arbitrary folder. No adware or internet access.

FEATURES:

· 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 virtual source paths which allows 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.