Mar 15 2005, 02:33
Joined: 22-February 04
From: San Diego, CA
Member No.: 12180
What it does:
Attempts to save space by storing frame data in the smallest possible frame. Usually MP3s are already stored in the most efficient way possible. However, for high-bitrate CBR files (like --preset insane) there can be a lot of wasted space
psyllium has made a great Windows GUI for this program. The GUI thread is here. Many people will find it easier to use than the CLI, and it has a few more features too (recursive directory support, 2-pass CBR).
How to use:
Download this 7Z file (version 2.04) (mirror)
Extract to a directory that makes sense.
Type "mp3packer in.mp3 out.mp3" to repack the in.mp3 file
OR see mp3packer.html included in the package (or available here) for more options.
The source can be downloaded here (mirror).
* Can make --preset insane files up to 10% smaller LOSSLESSLY (depending on the LAME version used)
* Squeezes out all the padding it can from any MP3 (Will not produce a larger file, unless you use the -b switch or something goes wrong)
* Writes valid LAME/XING header for proper VBR seeking
* Many people also use this backwards, to losslessly turn VBR into larger CBR files to humor players which can't handle VBR
* Includes a brute-force compression optimization option as of 1.10 to further compress files
* Now supports Unicode file names and paths
* Support for encoding an entire directory of files
* Works on Windows, Linux, 64-bit Linux, Linux through WINE, and should work perfectly on any other platform with an OCaml port
* GPL, so anybody can tweak it as long as it stays GPL
A few caveats:
* The program will always output an MP3 that doesn't use CRCs, even if the input file uses CRC. This is primarily laziness on my part, but nobody really needs them, and it saves 600 bits per second... (it's a feature, not a bug!)
* The 32-bit version will not process files larger than 1GB. The 64-bit version has a much higher limitation (4EB) which is unlikely to be encountered.
* There seems to be an incompatibility with the multi-threaded repacking code and 32-bit Windows XP. If you run across an error, try adding "--workers 0" to the command line.
Changelog (click here!)
This post has been edited by Omion: Sep 1 2012, 04:34
"We demand rigidly defined areas of doubt and uncertainty!" - Vroomfondel, H2G2
Mar 18 2005, 07:59
Joined: 15-December 01
Member No.: 655
just tried this. Saved a couple of bytes.
However the output is NOT the same
I used winamp diskwrite plugin.
Ran crc32 and md5 check on the files and they did not match,
also the size of the 2 decoded wavs where not identical either.
and id3v2 tags are removed from the file.
This post has been edited by sven_Bent: Mar 18 2005, 08:01
Sven Bent - Denmark
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