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<h1 class="page-title">Source: options/custom.js</h1>
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<pre class="prettyprint source linenums"><code>/*jshint node:true*/
'use strict';
var utils = require('../utils');
/*
*! Custom options methods
*/
module.exports = function(proto) {
/**
* Add custom input option(s)
*
* When passing a single string or an array, each string containing two
* words is split (eg. inputOptions('-option value') is supported) for
* compatibility reasons. This is not the case when passing more than
* one argument.
*
* @example
* command.inputOptions('option1');
*
* @example
* command.inputOptions('option1', 'option2');
*
* @example
* command.inputOptions(['option1', 'option2']);
*
* @method FfmpegCommand#inputOptions
* @category Custom options
* @aliases addInputOption,addInputOptions,withInputOption,withInputOptions,inputOption
*
* @param {...String} options option string(s) or string array
* @return FfmpegCommand
*/
proto.addInputOption =
proto.addInputOptions =
proto.withInputOption =
proto.withInputOptions =
proto.inputOption =
proto.inputOptions = function(options) {
if (!this._currentInput) {
throw new Error('No input specified');
}
var doSplit = true;
if (arguments.length > 1) {
options = [].slice.call(arguments);
doSplit = false;
}
if (!Array.isArray(options)) {
options = [options];
}
this._currentInput.options(options.reduce(function(options, option) {
var split = String(option).split(' ');
if (doSplit && split.length === 2) {
options.push(split[0], split[1]);
} else {
options.push(option);
}
return options;
}, []));
return this;
};
/**
* Add custom output option(s)
*
* @example
* command.outputOptions('option1');
*
* @example
* command.outputOptions('option1', 'option2');
*
* @example
* command.outputOptions(['option1', 'option2']);
*
* @method FfmpegCommand#outputOptions
* @category Custom options
* @aliases addOutputOption,addOutputOptions,addOption,addOptions,withOutputOption,withOutputOptions,withOption,withOptions,outputOption
*
* @param {...String} options option string(s) or string array
* @return FfmpegCommand
*/
proto.addOutputOption =
proto.addOutputOptions =
proto.addOption =
proto.addOptions =
proto.withOutputOption =
proto.withOutputOptions =
proto.withOption =
proto.withOptions =
proto.outputOption =
proto.outputOptions = function(options) {
var doSplit = true;
if (arguments.length > 1) {
options = [].slice.call(arguments);
doSplit = false;
}
if (!Array.isArray(options)) {
options = [options];
}
this._currentOutput.options(options.reduce(function(options, option) {
var split = String(option).split(' ');
if (doSplit && split.length === 2) {
options.push(split[0], split[1]);
} else {
options.push(option);
}
return options;
}, []));
return this;
};
/**
* Specify a complex filtergraph
*
* Calling this method will override any previously set filtergraph, but you can set
* as many filters as needed in one call.
*
* @example <caption>Overlay an image over a video (using a filtergraph string)</caption>
* ffmpeg()
* .input('video.avi')
* .input('image.png')
* .complexFilter('[0:v][1:v]overlay[out]', ['out']);
*
* @example <caption>Overlay an image over a video (using a filter array)</caption>
* ffmpeg()
* .input('video.avi')
* .input('image.png')
* .complexFilter([{
* filter: 'overlay',
* inputs: ['0:v', '1:v'],
* outputs: ['out']
* }], ['out']);
*
* @example <caption>Split video into RGB channels and output a 3x1 video with channels side to side</caption>
* ffmpeg()
* .input('video.avi')
* .complexFilter([
* // Duplicate video stream 3 times into streams a, b, and c
* { filter: 'split', options: '3', outputs: ['a', 'b', 'c'] },
*
* // Create stream 'red' by cancelling green and blue channels from stream 'a'
* { filter: 'lutrgb', options: { g: 0, b: 0 }, inputs: 'a', outputs: 'red' },
*
* // Create stream 'green' by cancelling red and blue channels from stream 'b'
* { filter: 'lutrgb', options: { r: 0, b: 0 }, inputs: 'b', outputs: 'green' },
*
* // Create stream 'blue' by cancelling red and green channels from stream 'c'
* { filter: 'lutrgb', options: { r: 0, g: 0 }, inputs: 'c', outputs: 'blue' },
*
* // Pad stream 'red' to 3x width, keeping the video on the left, and name output 'padded'
* { filter: 'pad', options: { w: 'iw*3', h: 'ih' }, inputs: 'red', outputs: 'padded' },
*
* // Overlay 'green' onto 'padded', moving it to the center, and name output 'redgreen'
* { filter: 'overlay', options: { x: 'w', y: 0 }, inputs: ['padded', 'green'], outputs: 'redgreen'},
*
* // Overlay 'blue' onto 'redgreen', moving it to the right
* { filter: 'overlay', options: { x: '2*w', y: 0 }, inputs: ['redgreen', 'blue']},
* ]);
*
* @method FfmpegCommand#complexFilter
* @category Custom options
* @aliases filterGraph
*
* @param {String|Array} spec filtergraph string or array of filter specification
* objects, each having the following properties:
* @param {String} spec.filter filter name
* @param {String|Array} [spec.inputs] (array of) input stream specifier(s) for the filter,
* defaults to ffmpeg automatically choosing the first unused matching streams
* @param {String|Array} [spec.outputs] (array of) output stream specifier(s) for the filter,
* defaults to ffmpeg automatically assigning the output to the output file
* @param {Object|String|Array} [spec.options] filter options, can be omitted to not set any options
* @param {Array} [map] (array of) stream specifier(s) from the graph to include in
* ffmpeg output, defaults to ffmpeg automatically choosing the first matching streams.
* @return FfmpegCommand
*/
proto.filterGraph =
proto.complexFilter = function(spec, map) {
this._complexFilters.clear();
if (!Array.isArray(spec)) {
spec = [spec];
}
this._complexFilters('-filter_complex', utils.makeFilterStrings(spec).join(';'));
if (Array.isArray(map)) {
var self = this;
map.forEach(function(streamSpec) {
self._complexFilters('-map', streamSpec.replace(utils.streamRegexp, '[$1]'));
});
} else if (typeof map === 'string') {
this._complexFilters('-map', map.replace(utils.streamRegexp, '[$1]'));
}
return this;
};
};
</code></pre>
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