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Ecm | | Description: | Reduces size of CD images | | Download: | ecm.lha (TIPS: Use the right click menu if your browser takes you back here all the time) | | Size: | 69kb | | Version: | 1.0 | | Date: | 20 Sep 2006 | | Author: | Neill Corlett, AmigaOS 4.0 compile by Spot / Up Rough | | Submitter: | Spot / Up Rough | | Email: | spot/triad se | | Requirements: | AmigaOS 4.0 and a CD image. | | Category: | utility/filetool | | License: | GPL | | Distribute: | yes | | Min OS Version: | 4.0 | | FileID: | 2089 | | | | | Comments: | 0 | | Snapshots: | 0 | | Videos: | 0 | | Downloads: | 568 (Current version) | | 568 (Accumulated) | | Votes: | 0 (0/0) (30 days/7 days) | |
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ECM (Error Code Modeler) encode/decode utilities
Version 1.0
Copyright 2002 Neill Corlett
Distributed under the terms of the GNU GPL; read source code for details
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Introduction
------------
The ECM format allows you to reduce the size of a typical CD image file
(BIN, CDI, NRG, CCD, or any other format that uses raw sectors; results may
vary).
It works by eliminating the Error Correction/Detection Codes (ECC/EDC) from
each sector whenever possible. The encoder automatically adjusts to
different sector types and automatically skips any headers it encounters.
The results will vary depending on how much redundant ECC/EDC data is
present. Note that for "cooked" ISO files, there will be no reduction.
Setup / Usage
-------------
Run ECM with no parameters to see a simple usage reference:
usage: ecm cdimagefile [ecmfile]
Where "cdimagefile" is the name of the CD image file, and "ecmfile"
(optional) is the name of the ECM file. If you don't specify ecmfile, it
defaults to cdimagefile plus a .ecm suffix.
UNECM works the same way, but in reverse:
usage: unecm ecmfile [outputfile]
"ecmfile" must end in .ecm. If outputfile is not specified, it defaults
to ecmfile minus the .ecm suffix.
Thanks to
---------
ProtoCat for inspiring me to write this.
Where to find me
----------------
email: corlett()lfx.org
www: http://lfx.org/~corlett/
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