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Version 1.0
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KrumpetPirate
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commit
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106
AAXtoMP3.pl
Executable file
106
AAXtoMP3.pl
Executable file
@ -0,0 +1,106 @@
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#!/usr/bin/env perl
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use strict;
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use warnings;
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use v5.22.0;
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use autodie;
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use Getopt::Long qw/GetOptions/;
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Getopt::Long::Configure qw/gnu_getopt/;
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use File::Basename qw/fileparse/;
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use IO::CaptureOutput qw/capture_exec/;
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say "Starting $0...";
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my $VERBOSE;
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my $AUTHCODE;
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my $INPUT_FILE;
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my $CHAPTER;
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GetOptions(
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'auth|a=s' => \$AUTHCODE,
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'input|i=s' => \$INPUT_FILE,
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'verbose|v' => \$VERBOSE,
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'chapter|c' => \$CHAPTER,
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) or die "Usage: $0 -verbose -chapter -auth <AUDIBLE AUTH CODE> -input <INPUT FILE PATH>";
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die "Usage: $0 -verbose -chapter -auth <AUDIBLE AUTH CODE> -input <INPUT AAX PATH>"
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unless ($INPUT_FILE && $AUTHCODE);
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die "$INPUT_FILE is not a valid path" unless (-f $INPUT_FILE);
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my ($filename, $dir, $extension) = fileparse($INPUT_FILE, qr/\.[^.]*/);
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my $ret = system_execute("ffprobe $INPUT_FILE");
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my @fflines = split /\n/, $ret;
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my $file_type = pull_from_ffprobe("major_brand", @fflines);
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my $file_title = pull_from_ffprobe("title", @fflines);
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my $file_author = pull_from_ffprobe("artist", @fflines);
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my @chapters = grep { m/^\s+Chapter/ } @fflines;
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die "Input file ffprobe does not appear to match an AAX file type metadata"
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unless $file_type =~ /aax/;
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my $output;
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if ($file_title && $file_author) {
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$output = "$file_title by $file_author";
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} else {
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$output = $filename;
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}
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my $output_sh_safe = quotemeta $output;
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if (@chapters && $CHAPTER) {
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say "Attempting to convert AAX to MP3 by chapter. This will increase the processing time...";
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system_execute("mkdir -p $dir$output_sh_safe");
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my $chapter_index = 1;
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foreach my $chapter (@chapters) {
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my ($start, $duration) = extract_ts($chapter);
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my $output_fn = quotemeta "$dir$output/$output (Chapter $chapter_index).mp3";
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say "Converting Chapter $chapter_index START: $start DURATION: $duration...";
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$ret = system_execute("ffmpeg -activation_bytes $AUTHCODE -i $INPUT_FILE -vn -c:a libmp3lame -ab 128k -ss $start -t $duration $output_fn");
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$chapter_index++;
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say $ret if $VERBOSE;
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}
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} else {
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say "Using Audible auth code to copy AAX audio directly to MP3 format...";
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$ret = system_execute("ffmpeg -activation_bytes $AUTHCODE -i $INPUT_FILE -vn -c:a libmp3lame -ab 128k $dir$output_sh_safe.mp3");
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say $ret if $VERBOSE;
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}
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say "End of $0...";
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sub system_execute {
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my ($stdout, $stderr, $success, $exit_code) = capture_exec(@_);
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say "stdout: $stdout\nstderr: $stderr\nsuccess: $success\nexit code: $exit_code" if ($VERBOSE);
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if ($success) {
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return $stdout if $stdout;
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return $stderr if $stderr;
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} else {
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my $command = join " ", @_;
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die "Command $command was not successful, debug.";
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}
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}
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sub extract_ts {
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my $line = shift;
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$line =~ s/.*://;
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$line =~ s/^\s*(.*?)\s*$/$1/;
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my @parts = split /\,/, $line;
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my $start = $parts[0];
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my $end = $parts[1];
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$start =~ s/.* //;
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$end =~ s/.* //;
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my $duration = $end - $start;
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return (convert_seconds($start), convert_seconds($duration));
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}
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sub convert_seconds {
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my $sec = shift;
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my $time = sprintf "%02d:%02d:%02d.%03d",
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(gmtime($sec))[2,1,0, 0 % 1000];
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}
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sub pull_from_ffprobe {
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my $desired = shift;
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my @fflines = @_;
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return unless ($desired && @fflines);
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my ($line) = grep { m/^\s+$desired/ } @fflines;
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$line =~ s/^\s*(.*?)\s*$/$1/;
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$line =~ s/.*://;
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$line =~ s/^\s*(.*?)\s*$/$1/;
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return $line;
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}
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37
AAXtoMP3.py
37
AAXtoMP3.py
@ -1,37 +0,0 @@
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#!/usr/bin/python3
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import sys
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import getopt
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import shutil
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def usage():
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print('Usage: '+sys.argv[0]+' -a <AMAZON AUTH STRING> -f <AAX FILE>')
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def main(argv):
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try:
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opts, args = getopt.getopt(sys.argv[1:], 'a:f:h', ['auth=', 'file=', 'help'])
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except getopt.GetoptError:
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usage()
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sys.exit(2)
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for opt, arg in opts:
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if opt in ('-h', '--help'):
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usage()
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sys.exit(2)
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elif opt in ('-a', '--auth'):
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auth_string = arg
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elif opt in ('-f', '--file'):
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input_file = arg
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else:
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usage()
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sys.exit(2)
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if not auth_string:
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usage()
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sys.exit(2)
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if not input_file:
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usage()
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sys.exit(2)
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print(auth_string)
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print(input_file)
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if __name__ == "__main__":
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main(sys.argv[1:])
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39
README.md
39
README.md
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# AAXtoMP3
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The purpose of this software is to convert AAX files to a more common MP3 format.
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The purpose of this software is to convert AAX files to a more common MP3 format
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through a basic perl script frontend to FFMPEG.
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Audible uses this file format to maintain DRM restrictions on their audio
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books and if you download your book through your library it will be
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@ -16,8 +17,42 @@ You will need your four byte authitication code that comes from Audible's
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servers. This will be used by ffmpeg to perform the initial audio convert. You
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can obtain this string from a tool like [audible-activator](https://github.com/inAudible-NG/audible-activator).
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## Anti-Piracy Notice
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## Requirements
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* perl version 5.22.0 or later
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* ffmpeg version 2.8.3 or later
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You will also require the following perl modules:
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* autodie
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* Getopt::Long
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* File::Basename
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* IO::CaptureOutput
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I would suggest installing cpanminus either through CPAN or (preferably) through your
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distro's repositories. Take note that many perl modules can be packaged in your repos
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as well so take a look there before resorting to cpan/cpanminus.
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## Usage
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```
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perl AAXtoMP3.pl -a AUTHCODE -i AAXFILE -v -c
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```
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* -a: **your** Audible auth code (it won't correctly decode otherwise) (required)
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* -i: the input AAX file to be converted (required)
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* -v: verbose (optional)
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* -c: Convert to chapters based on input file's metadata information
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## Known issues
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Currently the chapters mode (activated by the -c flag) does not work correctly.
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Parsing the metadata works fine but when the timestamps are converted to
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HH:MM:SS.xxx format there is some sort of hickup. It could be that Audible has some
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delay in the file to prevent this, but starting from Chapter 2 of the book it will
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no longer sync. I don't know if I will ever fix this, so avoid using the -c flag for now
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to produce one large MP3 file for the audiobook.
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Also this was tested on Linux with the above requirements. No effort will be made to
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port this work to any other operating system, though it may work fine. Want a Windows/
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OSX port? You'll have to fork the work.
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## Anti-Piracy Notice
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Note that this project does NOT ‘crack’ the DRM. It simplys allows the user to
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use their own encryption key (fetched from Audible servers) to decrypt the
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audiobook in the same manner that the official audiobook playing software does.
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