reencoder-cli

Batch video reencode with ffmpeg and ffprobe. Project local configurations. Configurations variations. Glob support.

Installation

Globally as a cli

npm install -g reencoder-cli

Locally as a library

npm install -s reencoder-cli

Configuration

Add .reencoderrc.json to the execution directory or any of its parents. See examples in the 'examples/' directory.

{
  "description": "The example is for repeatedly converting and collating videos in nested subdirectories to a uniform format, 1080p, 720p or 480p.",
  "description": "It will skip files which exist in the output dir already and it will not clear the output folder.",
  "inputDir": "./",
  "outputDir": "./Converted",
  "clearOutputDir": false,
  "default": "720",
  "concurrency": 1,
  "parameters": [
    "-hwaccel", "auto",
    "-i", "@@inputDir/**/*@(.mp4|.mov|.avi|.wmv)",
    {
      "1080": [
        "-vf", "scale=trunc(oh*a/2)*2:1080",
        "-maxrate", "2M",
        "-preset", "fast",
        "-b:a", "128k",
        "-r", 24,
        "-profile:v", "high",
        "-tune", "film",
        "-level", "4.1",
        "-movflags", "+faststart",
        "-bufsize", "2M",
        "-ac", 2,
        "-ar", 44100,
        "@@outputDir/@@inputFileName.@@outputGroupName.mp4"
      ],
      "720": [
        "-vf", "scale=trunc(oh*a/2)*2:720",
        "-maxrate", "1.2M",
        "-preset", "fast",
        "-b:a", "128k",
        "-r", 24,
        "-profile:v", "high",
        "-tune", "film",
        "-level", "4.1",
        "-movflags", "+faststart",
        "-bufsize", "2M",
        "-ac", 2,
        "-ar", 44100,
        "@@outputDir/@@inputFileName.@@outputGroupName.mp4"
      ],
      "480": [
        "-vf", "scale=trunc(oh*a/2)*2:480",
        "-maxrate", "0.8M",
        "-preset", "fast",
        "-b:a", "128k",
        "-r", 24,
        "-profile:v", "high",
        "-tune", "film",
        "-level", "4.1",
        "-movflags", "+faststart",
        "-bufsize", "2M",
        "-ac", 2,
        "-ar", 44100,
        "@@outputDir/@@inputFileName.@@outputGroupName.mp4"
      ]
    }
  ]
}

Options

default : Defaults to ''. Specifies which named groups should run. If unspecified will run all groups. inputDir : Defaults to './'. outputDir : Defaults to './Converted'. concurrency : Defaults to 1. Specifies the number of encodes to run in parallel. clearOutputDir : Defaults to false.

Parameters

Irregular

-i : The standard input parameter for ffmpeg is a glob. -y : The absence of -y assumes -n, which instead of overwriting is to skip without prompt.

Reference: main options

Objects

Parameters included as named values of objects will be included in the ffmpeg execution parameters only when their name matches, (when a library) an entry in the outputGroupNames variable, or (when a cli) arguments in the terminal.

This allows for some simple configuration variations.

Objects can be nested.

String replacement

Available string replacement variables are declared here:

@@inputFile : Absolute input file path. @@inputFileBase : Full file name, including extension. @@inputFileBaseSanitized : Full file name, including extension, with special characters and spaces removed. @@inputFileBaseSanitizedLowerCase : Full file name, including extension, with special characters and spaces removed, lowercase. @@inputFileDir : Sub directory relative to inputDir. @@inputFileExt : File extension. @@inputFileName : Front part of the file name. @@inputFileNameSanitized : Front part of the file name, with special characters and spaces removed. @@inputFileNameSanitizedLowerCase : Front part of the file name, with special characters and spaces removed, lowercase. @@outputDir : Absolute output file path. @@outputGroupName : Nested configuration name.

Execution

With default output:

$ reencoder

With specified outputs:

$ reencoder 1080 720 480

As a library:

const { reencode, getConfig } = require('reencoder-cli')
const config = getConfig(); // Lookup .reencoderrc.json
const promise = reencode({
  config, // Config can be specified here, or it will be fetched from .reencoderrc.json through parent directories
  status = (state) => console.log( // Outputs to console: reencode 6.25% 1/3 18.75% nested/one.mp4
    state.mode,
    state.totalPercentComplete,
    `${state.currentItem}/${state.total}`,
    state.currentPercentComplete,
    state.currentInputFile
  )
})
await promise; // promise.kill() will prematurely terminate the reencoding