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.TH "MEDIAEXTRACT" 1 "2024-08-13" "1.2.0" "SlackBuilds.org"
.SH NAME
mediaextract \- extracts media files that are embedded within other files
.\" RST source for mediaextract(1) man page. Convert with:
.
.\" rst2man.py mediaextract.rst > mediaextract.1
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.SH SYNOPSIS
.sp
mediaextract [\fI\-options\fP] \fIfilename\fP [\fIfilename\fP ...]
.SH DESCRIPTION
.sp
\fBmediaextract\fP extracts known media types such as RIFF, Ogg, etc,
from various \(aqresource\(aq or \(aqarchive\(aq format files.  files. It works
by looking for \(aqmagic\(aq byte sequences (like the \fBfile(1)\fP command
does). A typical use case would be extracting resources from a
game. \fBmediaextract\fP does not support compression (zip/rar/7z/etc), so
uncompress the file first, if necessary.
.SH OPTIONS
.INDENT 0.0
.TP
.B  \-h\fP,\fB  \-\-help
Print this help message.
.TP
.B  \-v\fP,\fB  \-\-version
Print program version.
.TP
.B  \-q\fP,\fB  \-\-quiet
Do not print status messages.
.TP
.B  \-s\fP,\fB  \-\-simulate
Don\(aqt write any output files.
.TP
.BI \-o\fP,\fB  \-\-output\fB= DIR
Directory where extracted files  should  be  written.  (default: ".")
.TP
.BI \-a\fP,\fB  \-\-filename\fB= FORMAT
Format  string  for the file names.  (default: "{filename}_{offset}.{ext}")
.INDENT 7.0
.TP
.B Supported variables:
.INDENT 7.0
.TP
.B filename
Filename of the extracted archive.
.TP
.B offset
Offset within  the  archive, in hexadecimal.
.TP
.B index
0\-based index of the extracted file in decimal.
.TP
.B size
Size of the  extracted file  in decimal.
.TP
.B ext
Extension associated with the filetype of the extracted file.
.UNINDENT
.UNINDENT
.TP
.BI \-i\fP,\fB  \-\-offset\fB= OFFSET
Start processing at byte OFFSET. (default: 0)
.TP
.BI \-n\fP,\fB  \-\-length\fB= LENGTH
Only process LENGTH bytes.  (default and maximum: 8 EB)
.TP
.BI \-m\fP,\fB  \-\-min\-size\fB= SIZE
Minumum size of extracted files (skip smaller). (default: 0)
.TP
.BI \-x\fP,\fB  \-\-max\-size\fB= SIZE
Maximum size of extracted files (skip larger). Default and maximum: 16 EB.
.sp
The last character of OFFSET, LENGTH and SIZE may be one of the following:
.INDENT 7.0
.INDENT 3.5
.INDENT 0.0
.IP \(bu 2
B (or none) for Bytes
.IP \(bu 2
k for Kilobytes (units of 1024 Bytes)
.IP \(bu 2
M for Megabytes (units of 1024 Kilobytes)
.IP \(bu 2
G for Gigabytes (units of 1024 Megabytes)
.IP \(bu 2
T for Terabytes (units of 1024 Gigabytes)
.IP \(bu 2
P for Petabytes (units of 1024 Terabytes)
.IP \(bu 2
E for Exabytes  (units of 1024 Petabytes)
.UNINDENT
.UNINDENT
.UNINDENT
.sp
The special value "max" selects the maximum alowed value.
.TP
.BI \-f\fP,\fB  \-\-formats\fB= FORMATS
Comma separated list of formats (file magics) to extract.
.INDENT 7.0
.TP
.B Supported formats:
.INDENT 7.0
.TP
.B all
all supported formats
.TP
.B default
the default set of formats (AIFF, ASF, AU, AVIF, BINK, BMP, GIF, HEIF, ID3v2, IT, JPEG, MPEG 1, MPEG PS, MIDI, MP4, Ogg, PNG, RIFF, S3M, SMK, XM, XMIDI)
.TP
.B audio
all audio files (AIFF, ASF, AU, ID3v2, IT, MIDI, MP4, Ogg, RIFF, S3M, XM, XMIDI)
.TP
.B text \fI[1]\fP
all text files (ASCII, UTF\-8, UTF\-16LE, UTF\-16BE, UTF\-32LE, UTF\-32BE)
.TP
.B image
all image files (BMP, PNG, JPEG, GIF, AVIF, HEIF)
.TP
.B mpeg
all safe mpeg files (MPEG 1, MPEG PS, ID3v2)
.TP
.B tracker
all tracker files (MOD, S3M, IT, XM)
.TP
.B video
all video files (ASF, BINK, MP4, RIFF, SMK)
.TP
.B avif
AVIF image files
.TP
.B aiff
big\-endian (Apple) wave files
.TP
.B ascii
7\-bit ASCII files (only printable characters)
.TP
.B asf
Advanced Systems Format files (also WMA and WMV)
.TP
.B au
Sun Microsystems audio file format (.au or .snd)
.TP
.B bink
BINK files
.TP
.B bmp
Windows Bitmap files
.TP
.B gif
Graphics Interchange Format files
.TP
.B heif
HEIF images files
.TP
.B id3v2
MPEG layer 1/2/3 files with ID3v2 tags
.TP
.B it
ImpulseTracker files
.TP
.B jpeg
JPEG Interchange Format files
.TP
.B midi
MIDI files
.TP
.B mod \fI[2]\fP
Noisetracker/Soundtracker/Protracker Module files
.TP
.B mpg123 \fI[2]\fP \fI[3]\fP
MPEG layer 1/2/3 files (MP1, MP2, MP3)
.TP
.B mpeg1
MPEG 1 System Streams
.TP
.B mpegps
MPEG 2 Program Streams
.TP
.B mpegts \fI[2]\fP
MPEG 2 Transport Streams
.TP
.B mp4
MP4 files (M4A, M4V, 3GPP etc.)
.TP
.B ogg
Ogg files (Vorbis, Opus, Theora, etc.)
.TP
.B png
Portable Network Graphics files
.TP
.B riff
Resource Interchange File Format files (ANI, AVI, MMM, PAL, RDI, RMI, SGT, STY, WAV, WEBP and more)
.TP
.B s3m
ScreamTracker III files
.TP
.B smk
Smaker files
.TP
.B utf\-8
7\-bit ASCII and UTF\-8 files (only printable code points)
.TP
.B utf\-16be
big\-endian UTF\-16 files (only printable code points)
.TP
.B utf\-16le
little\-endian UTF\-16 files (only printable code points)
.TP
.B utf\-32be
big\-endian UTF\-32 files (only printable code points)
.TP
.B utf\-32le
little\-endian UTF\-32 files (only printable code points)
.TP
.B xm
Extended Module files
.TP
.B xmidi
XMIDI files
.UNINDENT
.UNINDENT
.UNINDENT
.sp
If \(aq\-\(aq is written before a format name, that format will be removed
from the set of formats to extract. E.g. extract everything except
tracker files:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
mediaextract \-\-formats=all,\-tracker data.bin
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
\fI[1]\fP NOTE: \(aqtext\(aq format might detect too much bogus text in UTF\-16 or
UTF\-32 encodings. I recommend to use \(aqutf\-8\(aq or \(aqascii\(aq instead, if you can.
.sp
\fI[2]\fP WARNING: Because MP1/2/3 files do not have a nice file magic, using
the \(aqmpg123\(aq format may cause \fIa lot\fP of false positives. Nowadays
MP3 files usually have an ID3v2 tag at the start, so using the \(aqid3v2\(aq
format is the better option anyway.
.sp
The detection accuracy of MOD files is not much better and of MPEG TS
it is even worse and thus the \(aqmpg123\(aq, \(aqmpegts\(aq and \(aqmod\(aq formats are
per default disabled.
.sp
\fI[3]\fP NOTE: When using only the \(aqmpg123\(aq format but not \(aqid3v2\(aq, any ID3v2
tag will be stripped. ID3v1 tags will still be kept.
.SH EXAMPLES
.sp
Extract .wav, .aif and .ogg (might actually be .ogg, .opus or .ogm) files from
the file \fBdata.bin\fP and store them in the \fB~/Music\fP directory:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
mediaextract \-f riff,aiff,ogg \-o ~/Music data.bin
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
This will then write files like such into \fB~/Music\fP:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
data.bin_00000000.ogg
data.bin_00FFB2E3.wav
data.bin_01F3CD45.aif
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
The hexadecimal number in the written file names gives the offset where the audio
file was found, within the data file.
.sp
Extract .mp3, .mp2 and .mp1 files (with or without ID3v2 tags). The \fBmpg123\fP
option yields a lot of false positives because there is no nice way to
unambigiously detect MPEG files. These false positives are however usually very
small, so using the \fB\-\-min\-size\fP option one can hopefully extract only real MPEG
files:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
mediaextract \-f id3v2,mpg123 \-\-min\-size=100k \-o ~/Music data.bin
.ft P
.fi
.UNINDENT
.UNINDENT
.SH COPYRIGHT
.sp
See the file /usr/doc/mediaextract\-1.2.0/LICENSE.txt for license information.
.SH AUTHOR
.sp
mediaextract was written by Mathias Panzenböck.
.sp
This man page written for the SlackBuilds.org project
by B. Watson, and is licensed under the WTFPL.
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