FFMPEG Progress Wrapper

Wraps your ffmpeg raw command line with a nice progress interface

---

Installation

$ npm install ffmpeg-progress-wrapper $ yarn ffmpeg-progress-wrapper

Use cases

• Provides a progress status for your video without you having to guess the frame count
• Provides duration and bitrate of the file

---

Usage

Constructor

import {FFMpegProgress} from 'ffmpeg-progress-wrapper';
new FFMpegProgress(args, options);

• args: string[] - List of string arguments
• options?: object - optional
  • cmd?: string - path to ffmpeg (defaults to ffmpeg from PATH)
  • cwd?: string - working dir (defaults to current working dir)
  • env?: ProcessEnv - environment vars (defaults to process.env)
  • duration?: number - output duration in seconds (default is determined from file)
    useful when using complex filters and the input time differs from output
  • hideFFConfig?: boolean - hide ffmpeg config from stderr (default false)
  • maxMemory?: number - max amount of bytes allowed by the process to use before killing for OOM (default unset)

FFMpegProgress.on('progress')

• progressData: object
  • eta: number | null - time left to process in seconds
  • speed: number | null - processed output time / real time (2x - twice realtime, 0.5x - half realtime)
  • fps: number | null
  • time: number | null - current output time in seconds
  • frame: number | null - current output frame
  • progress: number | null - progress percentage (from 0 to 1)
  • drop: number - dropped frames
  • dup: number - duplicated frames
  • quality: number[][] - stream quality per frame, per stream
  • psnr: { y: number | null, u: number | null, v: number | null, all: number | null }[][] - stream psnr per file, per stream, per channel (enabled via -psnr ffmpeg arg)
  • size: number | null - output file size
  • bitrate: number | null - output file bitrate in bytes

FFMpegProgress.on('raw') - Fires whenever ffmpeg outputs text - very volatile

• raw: string

FFMpegProgress.on('details') - Fires once per command, at the beginning

• details: object
  • duration: number - video duration in seconds
  • bitrate: number - video bitrate in bytes
  • start: number - video's first frame time in seconds

---

Example

const {FFMpegProgress} = require('ffmpeg-progress-wrapper');
// or
import {FFMpegProgress} from 'ffmpeg-progress-wrapper';

(async () => {
  
    const process = new FFMpegProgress(['-i', 'test.mov' ,'test output.mp4']);
    
    process.on('raw', console.log);
    
    process.once('details', (details) => console.log(JSON.stringify(details)));
    
    process.on('progress', (progress) => console.log(JSON.stringify(progress)));
    
    process.once('end', console.log.bind(console, 'Conversion finished and exited with code'));
    
    process.done(console.log);
    
    await process.onDone();

})();
/**
{
  duration: 216,
  bitrate: 36864,
  start: 0,
  resolution: { width: 320, height: 240 },
  fps: 25
}
{
  drop: 0,
  dup: 0,
  frame: 1366,
  time: 52.480078,
  speed: 105,
  fps: 0,
  eta: 1.5573325904761905,
  progress: 0.24296332407407406,
  quality: [ [ 28 ] ],
  psnr: [ [ { y: NaN, u: NaN, v: NaN, all: NaN } ] ],
  size: 36,
  bitrate: 0
}
{
  drop: 0,
  dup: 0,
  frame: 2700,
  time: 105.840078,
  speed: 106,
  fps: 2696.44,
  eta: 1.0392445471698113,
  progress: 0.4900003611111111,
  quality: [ [ 28 ] ],
  psnr: [ [ { y: NaN, u: NaN, v: NaN, all: NaN } ] ],
  size: 262180,
  bitrate: 20275.2
}
{
  drop: 0,
  dup: 0,
  frame: 4138,
  time: 163.360078,
  speed: 109,
  fps: 2756.01,
  eta: 0.4829350642201836,
  progress: 0.7562966574074074,
  quality: [ [ 28 ] ],
  psnr: [ [ { y: NaN, u: NaN, v: NaN, all: NaN } ] ],
  size: 524324,
  bitrate: 26316.8
}
{
  drop: 0,
  dup: 0,
  frame: 5423,
  time: 216.800078,
  speed: 110,
  fps: 2747.61,
  eta: 0,
  progress: 1.0037040648148148,
  quality: [ [ -1 ] ],
  psnr: [ [ { y: Infinity, u: Infinity, v: Infinity, all: Infinity } ] ],
  size: 977469,
  bitrate: 36966.4
}
Conversion finished and exited with code 0 null
*/