eac3to is able to convert E-AC3 and TrueHD audio tracks to AC3 or FLAC.Usage: eac3to src.eac3|evo|wav dst.ac3|flac|raw|wav [-options] This tool can convert a 2.0 or 5.1 E-AC3 or a 5.1 TrueHD track to AC3/FLAC.Features: • can show information about audio, video and VOB/EVO/(M2)TS files • can decode and encode various audio formats • can remove dialog normalization from AC3, E-AC3, DTS and TrueHD tracks • can extract AC3 stream from Blu-Ray TrueHD/AC3 tracks • can extract TrueHD stream from Blu-Ray TrueHD/AC3 tracks • can extract DTS core from DTS-HD tracks • can remove DTS zero padding and repair outdated DTS-ES headers • can apply positive or negative audio delays • can reduce bitdepth of decoded audio data by using TPDF dithering • can resample decoded audio data (using "r8brain") • can apply/reverse PAL speedup on decoded audio data (using "r8brain") • can demux all video and audio tracks of an EVO/VOB/(M2)TS source file • can join/rebuild multiple EVO/VOB files • can remux the video track of a EVO/VOB/(M2)TS source to Matroska eac3to sourcefile[+sourcefile2] [trackno:] [destfile|stdout] [-options]Examples: • eac3to source.pcm destination.flac • eac3to source.thd destination.flac destination.ac3 • eac3to source.evo 2: destination.eac3 3: destination.flac • eac3to feature_1.evo+feature_2.evo movie.mkv • eac3to 00001.m2ts movie.mkv If you prefer a graphical user interface, hereТ‘s a GUI made by The_Keymaker:http://madshi.net/EAC3toGUI.zip What's New in version 2.54: • VC-1 pulldown removal rewritten (same output as vc1conv 0.4, but faster) • VC-1 pulldown removal is activated by default • VC-1 pulldown removal can be manually deactivated by "-keepPulldown" option • VC-1 pulldown removal is also activated when muxing to MKV now • fixed Blu-Ray subtitle demuxing for seamless branching movies • better task seperation when doing multiple operations with an audio track