% M4ACUT(1) % nu774 [email protected] % May, 2014

NAME

m4acut - losslessly and gaplessly cut M4A(AAC in MP4) files

SYNOPSIS

m4acut [OPTIONS] [FILE]

DESCRIPTION

m4acut reads M4A files and extracts a portion of the audio into a new file. When chapter mode is specified, it can automatically extract each chapter into files, setting title tag and track tag from chapter title/number.

Since m4acut takes priming /padding samples into account and writes iTunSMPB tag properly, m4acut allows any cut point (not restricted to AAC frame boundaries) and the resulting files can be played gaplessly.

OPTIONS

-h, --help : Show command help

-v, --version : Show version number

-o, --output : Specify output filename. Ignored when -c/-C is set. Otherwise required.

-s, --start <[[hh:]mm:]ss[.ss..]|ns> : Specify cut start point in either time or number of samples. When not given, 0 is assumed.

Example:
:   588s
    :   588 samples
:   23.46
    :   23.46 secs
:   15
    :   15 secs
:   39:12
    :   39m 12s

-e, --end <[[hh:]mm:]ss[.ss..]|ns> : Specify cut end point (exclusive). When not given, end of input is assumed.

-c, --chapter-mode : Enables chapter mode. Splits automatically at each chapter point.

-C, --cuesheet : Specify cuesheet and split automatically at each track in it.

--cuesheet-encoding : Specify character encoding name of cuesheet. By default, UTF-8 is assumed.

-c, -C, and -s/-e are Mutually exclusive and cannot be set at the same time.