ffmpeg-on-progress

Utility for robustly reporting ffmpeg command progress with fluent-ffmpeg.

Some ffmpeg commands aren't capable fo producing progress events, such as when the input is a stream or when using multiple inputs. This simple utility allows you to accurately report progress in these cases by looking at the number of frames ffmpeg has processed with the caveat that you need to know the expected output's duration ahead of time.

In cases where fluent-ffmpeg produces a valid progress event, this module is a noop.

Install

1npm install --save ffmpeg-on-progress
2# or
3yarn add ffmpeg-on-progress

Usage

1const ffmpeg = require('fluent-ffmpeg')
2const ffmpegOnProgress = require('ffmpeg-on-progress')
3
4const logProgress = (progress, event) => {
5  // progress is a floating point number from 0 to 1
6  console.log('progress', (progress * 100).toFixed())
7}
8
9// estimated duration of output in milliseconds
10const durationEstimate = 4000
11
12const cmd = ffmpeg('input.avi')
13  .output('output.mp4')
14  .on('progress', ffmpegOnProgress(logProgress, durationEstimate))
15  .run()

Related

• fluent-ffmpeg

License

MIT © Travis Fischer