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<h1 class="page-title">Source: fluent-ffmpeg.js</h1>
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<pre class="prettyprint source linenums"><code>/*jshint node:true*/
'use strict';
var path = require('path');
var util = require('util');
var EventEmitter = require('events').EventEmitter;
var utils = require('./utils');
var ARGLISTS = ['_global', '_audio', '_audioFilters', '_video', '_videoFilters', '_sizeFilters', '_complexFilters'];
/**
* Create an ffmpeg command
*
* Can be called with or without the 'new' operator, and the 'input' parameter
* may be specified as 'options.source' instead (or passed later with the
* addInput method).
*
* @constructor
* @param {String|ReadableStream} [input] input file path or readable stream
* @param {Object} [options] command options
* @param {Object} [options.logger=<no logging>] logger object with 'error', 'warning', 'info' and 'debug' methods
* @param {Number} [options.niceness=0] ffmpeg process niceness, ignored on Windows
* @param {Number} [options.priority=0] alias for `niceness`
* @param {String} [options.presets="fluent-ffmpeg/lib/presets"] directory to load presets from
* @param {String} [options.preset="fluent-ffmpeg/lib/presets"] alias for `presets`
* @param {String} [options.stdoutLines=100] maximum lines of ffmpeg output to keep in memory, use 0 for unlimited
* @param {Number} [options.timeout=<no timeout>] ffmpeg processing timeout in seconds
* @param {String|ReadableStream} [options.source=<no input>] alias for the `input` parameter
*/
function FfmpegCommand(input, options) {
// Make 'new' optional
if (!(this instanceof FfmpegCommand)) {
return new FfmpegCommand(input, options);
}
EventEmitter.call(this);
if (typeof input === 'object' && !('readable' in input)) {
// Options object passed directly
options = input;
} else {
// Input passed first
options = options || {};
options.source = input;
}
// Add input if present
this._inputs = [];
if (options.source) {
this.input(options.source);
}
// Add target-less output for backwards compatibility
this._outputs = [];
this.output();
// Create argument lists
var self = this;
['_global', '_complexFilters'].forEach(function(prop) {
self[prop] = utils.args();
});
// Set default option values
options.stdoutLines = 'stdoutLines' in options ? options.stdoutLines : 100;
options.presets = options.presets || options.preset || path.join(__dirname, 'presets');
options.niceness = options.niceness || options.priority || 0;
// Save options
this.options = options;
// Setup logger
this.logger = options.logger || {
debug: function() {},
info: function() {},
warn: function() {},
error: function() {}
};
}
util.inherits(FfmpegCommand, EventEmitter);
module.exports = FfmpegCommand;
/**
* Clone an ffmpeg command
*
* This method is useful when you want to process the same input multiple times.
* It returns a new FfmpegCommand instance with the exact same options.
*
* All options set _after_ the clone() call will only be applied to the instance
* it has been called on.
*
* @example
* var command = ffmpeg('/path/to/source.avi')
* .audioCodec('libfaac')
* .videoCodec('libx264')
* .format('mp4');
*
* command.clone()
* .size('320x200')
* .save('/path/to/output-small.mp4');
*
* command.clone()
* .size('640x400')
* .save('/path/to/output-medium.mp4');
*
* command.save('/path/to/output-original-size.mp4');
*
* @method FfmpegCommand#clone
* @return FfmpegCommand
*/
FfmpegCommand.prototype.clone = function() {
var clone = new FfmpegCommand();
var self = this;
// Clone options and logger
clone.options = this.options;
clone.logger = this.logger;
// Clone inputs
clone._inputs = this._inputs.map(function(input) {
return {
source: input.source,
options: input.options.clone()
};
});
// Create first output
if ('target' in this._outputs[0]) {
// We have outputs set, don't clone them and create first output
clone._outputs = [];
clone.output();
} else {
// No outputs set, clone first output options
clone._outputs = [
clone._currentOutput = {
flags: {}
}
];
['audio', 'audioFilters', 'video', 'videoFilters', 'sizeFilters', 'options'].forEach(function(key) {
clone._currentOutput[key] = self._currentOutput[key].clone();
});
if (this._currentOutput.sizeData) {
clone._currentOutput.sizeData = {};
utils.copy(this._currentOutput.sizeData, clone._currentOutput.sizeData);
}
utils.copy(this._currentOutput.flags, clone._currentOutput.flags);
}
// Clone argument lists
['_global', '_complexFilters'].forEach(function(prop) {
clone[prop] = self[prop].clone();
});
return clone;
};
/* Add methods from options submodules */
require('./options/inputs')(FfmpegCommand.prototype);
require('./options/audio')(FfmpegCommand.prototype);
require('./options/video')(FfmpegCommand.prototype);
require('./options/videosize')(FfmpegCommand.prototype);
require('./options/output')(FfmpegCommand.prototype);
require('./options/custom')(FfmpegCommand.prototype);
require('./options/misc')(FfmpegCommand.prototype);
/* Add processor methods */
require('./processor')(FfmpegCommand.prototype);
/* Add capabilities methods */
require('./capabilities')(FfmpegCommand.prototype);
FfmpegCommand.setFfmpegPath = function(path) {
(new FfmpegCommand()).setFfmpegPath(path);
};
FfmpegCommand.setFfprobePath = function(path) {
(new FfmpegCommand()).setFfprobePath(path);
};
FfmpegCommand.setFlvtoolPath = function(path) {
(new FfmpegCommand()).setFlvtoolPath(path);
};
FfmpegCommand.availableFilters =
FfmpegCommand.getAvailableFilters = function(callback) {
(new FfmpegCommand()).availableFilters(callback);
};
FfmpegCommand.availableCodecs =
FfmpegCommand.getAvailableCodecs = function(callback) {
(new FfmpegCommand()).availableCodecs(callback);
};
FfmpegCommand.availableFormats =
FfmpegCommand.getAvailableFormats = function(callback) {
(new FfmpegCommand()).availableFormats(callback);
};
/* Add ffprobe methods */
require('./ffprobe')(FfmpegCommand.prototype);
FfmpegCommand.ffprobe = function(file) {
var instance = new FfmpegCommand(file);
instance.ffprobe.apply(instance, Array.prototype.slice.call(arguments, 1));
};
/* Add processing recipes */
require('./recipes')(FfmpegCommand.prototype);
</code></pre>
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<h2><a href="index.html">Index</a></h2><ul><li><a href="index.html#installation">Installation</a></li><ul></ul><li><a href="index.html#usage">Usage</a></li><ul><li><a href="index.html#prerequisites">Prerequisites</a></li><li><a href="index.html#creating-an-ffmpeg-command">Creating an FFmpeg command</a></li><li><a href="index.html#specifying-inputs">Specifying inputs</a></li><li><a href="index.html#input-options">Input options</a></li><li><a href="index.html#audio-options">Audio options</a></li><li><a href="index.html#video-options">Video options</a></li><li><a href="index.html#video-frame-size-options">Video frame size options</a></li><li><a href="index.html#specifying-multiple-outputs">Specifying multiple outputs</a></li><li><a href="index.html#output-options">Output options</a></li><li><a href="index.html#miscellaneous-options">Miscellaneous options</a></li><li><a href="index.html#setting-event-handlers">Setting event handlers</a></li><li><a href="index.html#starting-ffmpeg-processing">Starting FFmpeg processing</a></li><li><a href="index.html#controlling-the-ffmpeg-process">Controlling the FFmpeg process</a></li><li><a href="index.html#reading-video-metadata">Reading video metadata</a></li><li><a href="index.html#querying-ffmpeg-capabilities">Querying ffmpeg capabilities</a></li><li><a href="index.html#cloning-an-ffmpegcommand">Cloning an FfmpegCommand</a></li></ul><li><a href="index.html#contributing">Contributing</a></li><ul><li><a href="index.html#code-contributions">Code contributions</a></li><li><a href="index.html#documentation-contributions">Documentation contributions</a></li><li><a href="index.html#updating-the-documentation">Updating the documentation</a></li><li><a href="index.html#running-tests">Running tests</a></li></ul><li><a href="index.html#main-contributors">Main contributors</a></li><ul></ul><li><a href="index.html#license">License</a></li><ul></ul></ul><h3>Classes</h3><ul><li><a href="FfmpegCommand.html">FfmpegCommand</a></li><ul><li> <a href="FfmpegCommand.html#audio-methods">Audio methods</a></li><li> <a href="FfmpegCommand.html#capabilities-methods">Capabilities methods</a></li><li> <a href="FfmpegCommand.html#custom-options-methods">Custom options methods</a></li><li> <a href="FfmpegCommand.html#input-methods">Input methods</a></li><li> <a href="FfmpegCommand.html#metadata-methods">Metadata methods</a></li><li> <a href="FfmpegCommand.html#miscellaneous-methods">Miscellaneous methods</a></li><li> <a href="FfmpegCommand.html#other-methods">Other methods</a></li><li> <a href="FfmpegCommand.html#output-methods">Output methods</a></li><li> <a href="FfmpegCommand.html#processing-methods">Processing methods</a></li><li> <a href="FfmpegCommand.html#video-methods">Video methods</a></li><li> <a href="FfmpegCommand.html#video-size-methods">Video size methods</a></li></ul></ul>
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