@jrohlandt/ffmetadata
v1.7.0
Published
Read and write media metadata using ffmpeg
Downloads
14
Maintainers
Readme
node-ffmetadata
Read and write media metadata using ffmpeg's metadata framework.
Alternatives
- https://github.com/voltraco/node-taglib2
- https://github.com/vankasteelj/mediainfo-wrapper
See also #19 for some discussion.
Usage
var ffmetadata = require("ffmetadata");
// Set path to ffmpeg - optional if in $PATH or $FFMPEG_PATH
ffmetadata.setFfmpegPath("/path/to/ffmpeg");
// Read song.mp3 metadata
ffmetadata.read("song.mp3", function(err, data) {
if (err) console.error("Error reading metadata", err);
else console.log(data);
});
// Set the artist for song.mp3
var data = {
artist: "Me",
};
ffmetadata.write("song.mp3", data, function(err) {
if (err) console.error("Error writing metadata", err);
else console.log("Data written");
});
Artwork
You can optionally include an array of files to be added to the source file. This is a destructive action, it will overwrite any previous streams on the file. For audio data, this is typically just one image. For video, this is where you would write additional audio streams or subtitle tracks.
var options = {
attachments: ["cover.jpg"],
};
ffmetadata.write("song.mp3", {}, options, function(err) {
if (err) console.error("Error writing cover art");
else console.log("Cover art added");
});
Metadata
Metadata might include the following fields:
"artist"
: artist name"album"
: album name"title"
: song title"track"
: place in the album (e.g."5/8"
)"disc"
: for multidisc albums"label"
: record label"date"
: arbitrary, but usually year (e.g."2002"
)
See FFmpeg Metadata for details.
API
ffmetadata.read(file, [options], callback)
The callback
function is called (callback(err, data)
) with an error
or an object containing metadata from file
.
If options.dryRun
is truthy, the ffmpeg
process is not actually
invoked and instead an array of the arguments that would have been
used to invoke ffmpeg is returned synchronously. The callback
argument is not used in this case.
options.coverPath
: Option to provide a path, where ffmpeg
will save cover image. Unfortunately, ffmpeg
will always convert resulted image, based on extension in provided coverPath
.
ffmetadata.write(file, data, [options], callback)
Write metadata to file
and optionally append additional attachments
(e.g., artwork image).
The data
object should contain metadata fields supported by FFmpeg.
See the metadata section above for more information.
The options
object may be provided with any of the following fields:
options.attachments
: An array of files that should be appended as additional streams to the output. This can be used to e.g., attach artwork images; see the artwork section above for more information.options["id3v1"]
: If this property is truthy, id3 v1 will also be included. This is useful if compatibility with Windows Explorer is desired.options["id3v2.3"]
: If this property is truthy, id3 v2.3 will be used (instead of the default of v2.4). This is useful if compatibility with Windows Explorer is desired (see #8).options.dryRun
: If this property is truthy, theffmpeg
process is not actually invoked and instead an array of the arguments that would have been used to invoke ffmpeg is returned synchronously. Thecallback
argument is not used in this case.
callback(err)
is called when finished, with an error if one occurred.
Path to FFmpeg
By default, the module looks for the ffmpeg executable either in the FFMPEG_PATH
and PATH
environmental variables. You may also set this path in the code by
calling the ffmetadata.setFfmpegPath("path/to/ffmpeg")
function.
Installation
Dependency: FFmpeg or libav must be installed on the system.
This module uses the ffmpeg
command-line tool. Version: 0.10.
npm install ffmetadata