I wrote this because I wanted a command line tool that could
add album art to (and save from) mp3 files, compute replaygain
and save them as ID3 tags (readable by Winamp, etc).Features:
- Write (all) Text, URL and Picture frame tags, with description.
- Compute replay-gain values and set them as ID3v2.3 tags.
- Apply and Undo volume gain (as mp3gain).
- Extract pictures from mp3 files.
- Inspect ID3 v1.1, v2.3, and v2.4 tags.
- Inspect detailed info on mp3 files, including lametag data.
hydrogenaud.io/index.php/topic,49751.0
www.flumps.org/mp3z/tagging/metamp3.exe

Great to see metamp3 getting some love here! It’s still one of the fastest ways to handle ReplayGain and ID3v2.3 tags without a bulky GUI. I’ve been using it for batch processing my library for years. For anyone who finds the command line a bit intimidating for quick one-off edits though, I usually keep editmp3tags.com bookmarked as a backup. It’s handy when you just want to fix a single file’s metadata in the browser without firing up the terminal.
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The attachments in Hydrogenaudio are no longer available 😦
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I’ve added an alternative source. If anyone has a link to other versions, linking to them here in the comments would be appreciated. Thanks.
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Thanks for the link 🙂
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