初始化环境文件
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node_modules/fluent-ffmpeg/doc/fluent-ffmpeg.js.html
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node_modules/fluent-ffmpeg/doc/fluent-ffmpeg.js.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>JSDoc: Source: fluent-ffmpeg.js</title>
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<script src="scripts/prettify/prettify.js"> </script>
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<script src="scripts/prettify/lang-css.js"> </script>
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<!--[if lt IE 9]>
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<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<![endif]-->
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<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
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<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
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</head>
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<body>
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<div id="main">
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<h1 class="page-title">Source: fluent-ffmpeg.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>/*jshint node:true*/
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'use strict';
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var path = require('path');
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var util = require('util');
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var EventEmitter = require('events').EventEmitter;
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var utils = require('./utils');
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var ARGLISTS = ['_global', '_audio', '_audioFilters', '_video', '_videoFilters', '_sizeFilters', '_complexFilters'];
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/**
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* Create an ffmpeg command
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*
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* Can be called with or without the 'new' operator, and the 'input' parameter
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* may be specified as 'options.source' instead (or passed later with the
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* addInput method).
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*
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* @constructor
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* @param {String|ReadableStream} [input] input file path or readable stream
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* @param {Object} [options] command options
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* @param {Object} [options.logger=<no logging>] logger object with 'error', 'warning', 'info' and 'debug' methods
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* @param {Number} [options.niceness=0] ffmpeg process niceness, ignored on Windows
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* @param {Number} [options.priority=0] alias for `niceness`
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* @param {String} [options.presets="fluent-ffmpeg/lib/presets"] directory to load presets from
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* @param {String} [options.preset="fluent-ffmpeg/lib/presets"] alias for `presets`
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* @param {String} [options.stdoutLines=100] maximum lines of ffmpeg output to keep in memory, use 0 for unlimited
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* @param {Number} [options.timeout=<no timeout>] ffmpeg processing timeout in seconds
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* @param {String|ReadableStream} [options.source=<no input>] alias for the `input` parameter
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*/
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function FfmpegCommand(input, options) {
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// Make 'new' optional
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if (!(this instanceof FfmpegCommand)) {
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return new FfmpegCommand(input, options);
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}
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EventEmitter.call(this);
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if (typeof input === 'object' && !('readable' in input)) {
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// Options object passed directly
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options = input;
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} else {
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// Input passed first
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options = options || {};
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options.source = input;
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}
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// Add input if present
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this._inputs = [];
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if (options.source) {
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this.input(options.source);
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}
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// Add target-less output for backwards compatibility
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this._outputs = [];
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this.output();
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// Create argument lists
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var self = this;
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['_global', '_complexFilters'].forEach(function(prop) {
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self[prop] = utils.args();
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});
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// Set default option values
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options.stdoutLines = 'stdoutLines' in options ? options.stdoutLines : 100;
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options.presets = options.presets || options.preset || path.join(__dirname, 'presets');
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options.niceness = options.niceness || options.priority || 0;
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// Save options
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this.options = options;
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// Setup logger
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this.logger = options.logger || {
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debug: function() {},
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info: function() {},
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warn: function() {},
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error: function() {}
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};
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}
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util.inherits(FfmpegCommand, EventEmitter);
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module.exports = FfmpegCommand;
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/**
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* Clone an ffmpeg command
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*
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* This method is useful when you want to process the same input multiple times.
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* It returns a new FfmpegCommand instance with the exact same options.
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*
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* All options set _after_ the clone() call will only be applied to the instance
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* it has been called on.
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*
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* @example
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* var command = ffmpeg('/path/to/source.avi')
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* .audioCodec('libfaac')
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* .videoCodec('libx264')
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* .format('mp4');
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*
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* command.clone()
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* .size('320x200')
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* .save('/path/to/output-small.mp4');
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*
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* command.clone()
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* .size('640x400')
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* .save('/path/to/output-medium.mp4');
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*
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* command.save('/path/to/output-original-size.mp4');
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*
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* @method FfmpegCommand#clone
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* @return FfmpegCommand
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*/
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FfmpegCommand.prototype.clone = function() {
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var clone = new FfmpegCommand();
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var self = this;
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// Clone options and logger
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clone.options = this.options;
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clone.logger = this.logger;
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// Clone inputs
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clone._inputs = this._inputs.map(function(input) {
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return {
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source: input.source,
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options: input.options.clone()
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};
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});
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// Create first output
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if ('target' in this._outputs[0]) {
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// We have outputs set, don't clone them and create first output
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clone._outputs = [];
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clone.output();
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} else {
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// No outputs set, clone first output options
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clone._outputs = [
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clone._currentOutput = {
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flags: {}
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}
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];
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['audio', 'audioFilters', 'video', 'videoFilters', 'sizeFilters', 'options'].forEach(function(key) {
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clone._currentOutput[key] = self._currentOutput[key].clone();
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});
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if (this._currentOutput.sizeData) {
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clone._currentOutput.sizeData = {};
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utils.copy(this._currentOutput.sizeData, clone._currentOutput.sizeData);
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}
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utils.copy(this._currentOutput.flags, clone._currentOutput.flags);
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}
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// Clone argument lists
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['_global', '_complexFilters'].forEach(function(prop) {
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clone[prop] = self[prop].clone();
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});
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return clone;
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};
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/* Add methods from options submodules */
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require('./options/inputs')(FfmpegCommand.prototype);
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require('./options/audio')(FfmpegCommand.prototype);
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require('./options/video')(FfmpegCommand.prototype);
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require('./options/videosize')(FfmpegCommand.prototype);
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require('./options/output')(FfmpegCommand.prototype);
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require('./options/custom')(FfmpegCommand.prototype);
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require('./options/misc')(FfmpegCommand.prototype);
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/* Add processor methods */
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require('./processor')(FfmpegCommand.prototype);
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/* Add capabilities methods */
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require('./capabilities')(FfmpegCommand.prototype);
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FfmpegCommand.setFfmpegPath = function(path) {
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(new FfmpegCommand()).setFfmpegPath(path);
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};
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FfmpegCommand.setFfprobePath = function(path) {
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(new FfmpegCommand()).setFfprobePath(path);
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};
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FfmpegCommand.setFlvtoolPath = function(path) {
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(new FfmpegCommand()).setFlvtoolPath(path);
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};
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FfmpegCommand.availableFilters =
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FfmpegCommand.getAvailableFilters = function(callback) {
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(new FfmpegCommand()).availableFilters(callback);
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};
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FfmpegCommand.availableCodecs =
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FfmpegCommand.getAvailableCodecs = function(callback) {
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(new FfmpegCommand()).availableCodecs(callback);
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};
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FfmpegCommand.availableFormats =
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FfmpegCommand.getAvailableFormats = function(callback) {
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(new FfmpegCommand()).availableFormats(callback);
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};
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/* Add ffprobe methods */
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require('./ffprobe')(FfmpegCommand.prototype);
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FfmpegCommand.ffprobe = function(file) {
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var instance = new FfmpegCommand(file);
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instance.ffprobe.apply(instance, Array.prototype.slice.call(arguments, 1));
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};
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/* Add processing recipes */
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require('./recipes')(FfmpegCommand.prototype);
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</code></pre>
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</article>
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</section>
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</div>
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<nav>
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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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<footer>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.0</a> on Sun May 01 2016 12:10:37 GMT+0200 (CEST)
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