112 lines
4.2 KiB
Markdown
112 lines
4.2 KiB
Markdown
[](https://travis-ci.org/AndrewRadev/id3-image)
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This tool wraps the [rust-id3](https://github.com/jameshurst/rust-id3) library to provide an easy way to manipulate embedded cover art in an mp3 file. The embedded image usually gets picked up by music players and thumbnail generators.
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The project was made for my own personal usage, so it likely makes assumptions that are not ideal for all cases. If it doesn't work for you, please open [a github issue](https://github.com/AndrewRadev/id3-image/issues).
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It comes with three executables:
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- `id3-image-embed`
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- `id3-image-extract`
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- `id3-image-remove`
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A summary of their usage follows. You can also execute them with `--help` for additional information.
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## Embedding
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To embed an image into an mp3 file, use `id3-image-embed`:
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```
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id3-image-embed <music-file.mp3> [image-file.jpg]
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```
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The image doesn't *have* to be a JPEG, anything that the [image](https://github.com/PistonDevelopers/image) library accepts will work. It will, however, be embedded as a JPEG for no particular reason other than seeming like a sensible default choice.
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The ID3 tags will be stored as ID3v2.3, and written in-place in the music file.
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The image filepath is optional -- if omitted, the program is going to look for an image with the same name, but with a "jpg" extension. This is a bit specific, but fits with the default extraction filename, making it easy to extract → edit → embed.
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## Extracting
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In order to extract an embedded image file from an mp3, use `id3-image-extract`:
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```
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id3-image-extract <music-file.mp3> [image-file.jpg]
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```
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The image filepath is optional -- if omitted, the image will be named the same as the music file with a `jpg` extension. If an image file with that name already exists, it'll silently be overwritten. If the song file has no embedded images, you'll get an error message.
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You can append a `-v` or `--verbose` flag to echo the image filename to stdout for scripting purposes.
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## Removing
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Remove all embedded images from an mp3 file using `id3-image-remove`:
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```
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id3-image-remove <music-file.mp3>
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```
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This might be useful if you *don't* like cover art and would like to "clean" your mp3 files. The tool will ask for confirmation before deletion, just in case it was invoked by mistake. You can append `--no-confirm` to avoid this, if you're using it for scripting purposes.
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## Bonus scripts
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You can use `id3-image-extract` to build a "preview" tool for a quick look at an image's cover art. All you need is a temporary filename to extract to:
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``` bash
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#! /bin/sh
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set -e
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if [ $# -lt 1 ]; then
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echo "USAGE: id3-image-preview <music-file.mp3>"
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exit 1
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fi
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music_file=$1
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# Create an auto-removed file when script exits
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image_file=$(mktemp --suffix='.jpg')
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exec 3>"$image_file"
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rm "$image_file"
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id3-image-extract "$music_file" "$image_file"
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// Would probably work with `open` on a mac, but hasn't been tested:
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xdg-open "$image_file"
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```
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You can also make a script that chooses the image to embed using a GUI file picker. You'll need `zenity` for this one:
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``` bash
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#! /bin/sh
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set -e
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if [ $# -lt 1 ]; then
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echo "USAGE: id3-image-gui-embed <music-file.mp3>"
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exit 1
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fi
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music_file=$1
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# Pick the image file with a file chooser
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image_file=$(zenity --file-selection --filename="$(pwd)/" --title="Select Cover Art")
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id3-image-embed "$music_file" "$image_file"
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```
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This particular popup doesn't filter by images-only, because I couldn't figure out how to make a generic "image" filter with zenity. You can append `--file-filter='*.jpg'` to zenity to show only JPEGs.
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These scripts can be particularly convenient when attached to a GUI file manager. My preferred one, [Thunar](https://docs.xfce.org/xfce/thunar/start), allows "Custom actions" that these two can be plugged in.
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## Music used for testing:
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Elevator Music Attempt 1 by Christian Bakker: http://www.jamendo.com/en/list/a98147/echoes-from-the-past
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## Possible future work
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- Don't silently overwrite images when extracting
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- Allow different output formats
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- Allow different ID3 versions
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- Allow embedding/extracting multiple images (currently, only the first one is extracted)
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- Replace structopt + clap with a simpler CLI solution -- a lot of dependencies for a simple project
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