ffmpeg-extract-audio
v1.0.2
Published
Extracts an audio stream from a media file.
Downloads
1,604
Readme
ffmpeg-extract-audio
Extracts an audio stream from a media file using fluent-ffmpeg.
Install
npm install --save ffmpeg-extract-audio
# or
yarn add ffmpeg-extract-audio
Usage
const extractAudio = require('ffmpeg-extract-audio')
await extractAudio({
input: 'media/1.mp4',
output: 'test.mp3'
})
API
extractAudio(options)
Extracts an audio stream from a media file. Returns a Promise
for when the operation is complete.
options
input
Type: String
Path or URL to a media file.
output
Type: String
Path to write the output file to. If output
is not specified, the result will be a ReadableStream
.
format
Type: String
Audio container format to use.
Note: you may either specify output
or format
. If format
is not specified, it will be inferred from the output
file extension. If no format
or output
file is specified, the result will default to an mp3
stream.
channel
Type: Number
Default: 0
Which audio channel to extract in the case of multiple audio channels.
transform
Type: Function
Default: noop
Optional function to make changes to the underlying fluent-ffmpeg command. You may, for instance, change the audio bitrate or add custom audio filters.
Example:
// extract audio at 50% volume (result is an mp3 stream)
const mp3Stream = await extractAudio({
input: 'media/1.mp4',
format: 'mp3',
transform: (cmd) => {
cmd.audioFilters([
{
filter: 'volume',
options: '0.5'
}
])
}
})
log
Type: Function
Default: noop
Optional function to log the underlying ffmpeg command. You may, for example, use console.log
Related
- fluent-ffmpeg
- awesome-ffmpeg - A curated list of awesome ffmpeg resources with a focus on JavaScript.
License
MIT © Travis Fischer