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<h1 class="page-title">Source: options/audio.js</h1>
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<pre class="prettyprint source linenums"><code>/*jshint node:true*/
'use strict';
var utils = require('../utils');
/*
*! Audio-related methods
*/
module.exports = function(proto) {
/**
* Disable audio in the output
*
* @method FfmpegCommand#noAudio
* @category Audio
* @aliases withNoAudio
* @return FfmpegCommand
*/
proto.withNoAudio =
proto.noAudio = function() {
this._currentOutput.audio.clear();
this._currentOutput.audioFilters.clear();
this._currentOutput.audio('-an');
return this;
};
/**
* Specify audio codec
*
* @method FfmpegCommand#audioCodec
* @category Audio
* @aliases withAudioCodec
*
* @param {String} codec audio codec name
* @return FfmpegCommand
*/
proto.withAudioCodec =
proto.audioCodec = function(codec) {
this._currentOutput.audio('-acodec', codec);
return this;
};
/**
* Specify audio bitrate
*
* @method FfmpegCommand#audioBitrate
* @category Audio
* @aliases withAudioBitrate
*
* @param {String|Number} bitrate audio bitrate in kbps (with an optional 'k' suffix)
* @return FfmpegCommand
*/
proto.withAudioBitrate =
proto.audioBitrate = function(bitrate) {
this._currentOutput.audio('-b:a', ('' + bitrate).replace(/k?$/, 'k'));
return this;
};
/**
* Specify audio channel count
*
* @method FfmpegCommand#audioChannels
* @category Audio
* @aliases withAudioChannels
*
* @param {Number} channels channel count
* @return FfmpegCommand
*/
proto.withAudioChannels =
proto.audioChannels = function(channels) {
this._currentOutput.audio('-ac', channels);
return this;
};
/**
* Specify audio frequency
*
* @method FfmpegCommand#audioFrequency
* @category Audio
* @aliases withAudioFrequency
*
* @param {Number} freq audio frequency in Hz
* @return FfmpegCommand
*/
proto.withAudioFrequency =
proto.audioFrequency = function(freq) {
this._currentOutput.audio('-ar', freq);
return this;
};
/**
* Specify audio quality
*
* @method FfmpegCommand#audioQuality
* @category Audio
* @aliases withAudioQuality
*
* @param {Number} quality audio quality factor
* @return FfmpegCommand
*/
proto.withAudioQuality =
proto.audioQuality = function(quality) {
this._currentOutput.audio('-aq', quality);
return this;
};
/**
* Specify custom audio filter(s)
*
* Can be called both with one or many filters, or a filter array.
*
* @example
* command.audioFilters('filter1');
*
* @example
* command.audioFilters('filter1', 'filter2=param1=value1:param2=value2');
*
* @example
* command.audioFilters(['filter1', 'filter2']);
*
* @example
* command.audioFilters([
* {
* filter: 'filter1'
* },
* {
* filter: 'filter2',
* options: 'param=value:param=value'
* }
* ]);
*
* @example
* command.audioFilters(
* {
* filter: 'filter1',
* options: ['value1', 'value2']
* },
* {
* filter: 'filter2',
* options: { param1: 'value1', param2: 'value2' }
* }
* );
*
* @method FfmpegCommand#audioFilters
* @aliases withAudioFilter,withAudioFilters,audioFilter
* @category Audio
*
* @param {...String|String[]|Object[]} filters audio filter strings, string array or
* filter specification array, each with the following properties:
* @param {String} filters.filter filter name
* @param {String|String[]|Object} [filters.options] filter option string, array, or object
* @return FfmpegCommand
*/
proto.withAudioFilter =
proto.withAudioFilters =
proto.audioFilter =
proto.audioFilters = function(filters) {
if (arguments.length > 1) {
filters = [].slice.call(arguments);
}
if (!Array.isArray(filters)) {
filters = [filters];
}
this._currentOutput.audioFilters(utils.makeFilterStrings(filters));
return this;
};
};
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