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aphasemeter.js
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const addFilter = require('./utils').addFilter;
const registerFilter = require('./utils').registerFilter;
/**
* Augment FfmpegCommand with the aphasemeter function.
*
*
* @example
* ffmpeg().aphasemeter()
* ... // call filter configuration functions
* .build() // end filter configuration
* ...
* .applyFilters() // called once all filters have been configured
*
* @param {FfmpegCommand} ffmpegCommand The fluent-ffmpeg constructor.
* @return {FfmpegCommand} The ffmpegCommand augmented with the aphasemeter function.
*/
function aphasemeter(ffmpegCommand) {
registerFilter(ffmpegCommand, 'aphasemeter', function() {
return new AphasemeterFilter(this);
});
return ffmpegCommand;
}
/**
* Class exposing methods to configure the vstack filter in a builder pattern way.
*
* See {@link http://ffmpeg.org/ffmpeg-filters.html#vstack} for a description
* of each configuration option.
*/
class AphasemeterFilter {
/**
* @param {FfmpegCommand} ffmpegCommand The fluent-ffmpeg constructor.
*/
constructor (ffmpeg) {
this.ffmpeg = ffmpeg;
AphasemeterFilter.prototype.withRate = this.rate;
AphasemeterFilter.prototype.withSize = this.size;
AphasemeterFilter.prototype.withRc = this.rc;
AphasemeterFilter.prototype.withGc = this.gc;
AphasemeterFilter.prototype.withBc = this.bc;
AphasemeterFilter.prototype.withMpc = this.mpc;
AphasemeterFilter.prototype.withVideo = this.video;
}
/**
* Set the output frame rate. Default value is 25.
*
*
* @param val
*/
rate(val) {
this._rate = val;
return this;
}
/**
* Set the video size for the output. For the syntax of this option, check the
* (ffmpeg-utils)"Video size" section in the ffmpeg-utils manual.
* Default value is 800x400.
*
*
* @param val
*/
size(val) {
this._size = val;
return this;
}
/**
* Specify the red, green, blue contrast. Default values are 2,
* 7 and 1.
* Allowed range is [0, 255].
*
*
* @param val
*/
rc(val) {
this._rc = val;
return this;
}
/**
* Specify the red, green, blue contrast. Default values are 2,
* 7 and 1.
* Allowed range is [0, 255].
*
*
* @param val
*/
gc(val) {
this._gc = val;
return this;
}
/**
* Specify the red, green, blue contrast. Default values are 2,
* 7 and 1.
* Allowed range is [0, 255].
*
*
* @param val
*/
bc(val) {
this._bc = val;
return this;
}
/**
* Set color which will be used for drawing median phase. If color is
* none which is default, no median phase value will be drawn.
*
*
* @param val
*/
mpc(val) {
this._mpc = val;
return this;
}
/**
* Enable video output. Default is enabled.
*
* @param val
*/
video(val) {
this._video = val;
return this;
}
/**
* Creates this filter configuration and registers it in the ffmpeg instance.
* @return {ffmpegCommand} The ffmpeg instance.
*/
build() {
let opt = {};
if (this._rate) {
opt['rate'] = this._rate;
}
if (this._size) {
opt['size'] = this._size;
}
if (this._rc) {
opt['rc'] = this._rc;
}
if (this._gc) {
opt['gc'] = this._gc;
}
if (this._bc) {
opt['bc'] = this._bc;
}
if (this._mpc) {
opt['mpc'] = this._mpc;
}
if (this._video) {
opt['video'] = this._video;
}
addFilter(this.ffmpeg, {
filter: 'aphasemeter',
options: opt
});
return this.ffmpeg;
}
}
module.exports.aphasemeter = aphasemeter;