mcopy/app/lib/ffmpeg/index.js

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'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
const path_1 = require("path");
const fs_extra_1 = require("fs-extra");
const exec_1 = require("exec");
/** @class FFMPEG **/
class FFMPEG {
/**
* @constructor
* Creates an ffmpeg class
*
* @param {object} sys System object to be used to get temp directory
**/
constructor(sys) {
this.id = 'ffmpeg';
this.bin = sys.deps.ffmpeg;
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this.convert = sys.deps.convert;
this.TMPDIR = path_1.join(sys.tmp, 'mcopy_digital');
this.init();
}
/**
* Async method to call async functions from constructor
**/
async init() {
const Log = require('log');
this.log = await Log({ label: this.id });
await this.checkDir();
}
/**
* Add padding to a number to 5 places. Return a string.
*
* @param {integer} i Integer to pad
*
* @returns {string} Padded string
**/
padded_frame(i) {
let len = (i + '').length;
let str = i + '';
for (let x = 0; x < 5 - len; x++) {
str = '0' + str;
}
return str;
}
/**
* Render a single frame from a video or image to a png.
*
* @param {object} state State object containing file data
* @param {object} light Object containing color information for frame
*
* @returns {string} Path of frame
**/
async frame(state, light) {
const frameNum = state.frame;
const video = state.path;
const w = state.info.width;
const h = state.info.height;
const padded = this.padded_frame(frameNum);
let ext = 'tif';
let rgb = light.color;
let tmpoutput;
let cmd;
let output;
let cmd2;
let output2;
let scale = '';
if (w && h) {
scale = `,scale=${w}:${h}`;
}
//console.dir(state)
//if (system.platform !== 'nix') {
ext = 'png';
//}
tmpoutput = path_1.join(this.TMPDIR, `export-${padded}.${ext}`);
rgb = rgb.map((e) => {
return parseInt(e);
});
//
cmd = `${this.bin} -y -i "${video}" -vf "select='gte(n\\,${frameNum})'${scale}" -vframes 1 -compression_algo raw -pix_fmt rgb24 "${tmpoutput}"`;
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cmd2 = `${this.convert} "${tmpoutput}" -resize ${w}x${h} -size ${w}x${h} xc:"rgb(${rgb[0]},${rgb[1]},${rgb[2]})" +swap -compose Darken -composite "${tmpoutput}"`;
//ffmpeg -i "${video}" -ss 00:00:07.000 -vframes 1 "export-${time}.jpg"
//ffmpeg -i "${video}" -compression_algo raw -pix_fmt rgb24 "export-%05d.tiff"
//-vf "select=gte(n\,${frame})" -compression_algo raw -pix_fmt rgb24 "export-${padded}.png"
try {
this.log.info(cmd);
output = await exec_1.exec(cmd);
}
catch (err) {
this.log.error(err);
}
if (output && output.stdout)
this.log.info(`"${output.stdout}"`);
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if (this.convert && (rgb[0] !== 255 || rgb[1] !== 255 || rgb[2] !== 255)) {
try {
this.log.info(cmd2);
output2 = await exec_1.exec(cmd2);
}
catch (err) {
this.log.error(err);
}
}
if (output2 && output2.stdout)
this.log.info(`"${output2.stdout}"`);
return tmpoutput;
}
/**
* Render all frames in a video to the temp directory.
* Not in use.
*
* @param {string} video Path to video
* @param {object} obj Not sure
*
* @returns {?}
**/
async frames(video, obj) {
const tmppath = this.TMPDIR;
let ext = 'tif';
let tmpoutput;
//if (system.platform !== 'nix') {
ext = 'png';
//}
tmpoutput = path_1.join(tmppath, `export-%05d.${ext}`);
try {
await fs_extra_1.mkdir(tmppath);
}
catch (err) {
this.log.error(err);
}
//ffmpeg -i "${video}" -compression_algo raw -pix_fmt rgb24 "${tmpoutput}"
}
/**
* Clears a specific frame from the tmp directory
*
* @param {integer} frame Integer of frame to clear
*
* @returns {boolean} True if successful, false if not
**/
async clear(frame) {
const padded = this.padded_frame(frame);
let ext = 'tif';
let tmppath;
let tmpoutput;
let cmd;
let fileExists;
//if (system.platform !== 'nix') {
ext = 'png';
//}
tmppath = path_1.join(this.TMPDIR, `export-${padded}.${ext}`);
try {
fileExists = await fs_extra_1.exists(tmppath);
}
catch (err) {
this.log.error(err);
}
if (!fs_extra_1.exists)
return false;
try {
await fs_extra_1.unlink(tmppath);
this.log.info(`Cleared frame ${tmppath}`);
}
catch (err) {
this.log.error(err);
}
return true;
}
/**
* Delete all frames in temp directory.
*
**/
async clearAll() {
const tmppath = this.TMPDIR;
let files;
try {
files = await fs_extra_1.readdir(tmppath);
}
catch (err) {
this.log.error(err);
}
if (files) {
files.forEach(async (file, index) => {
try {
await fs_extra_1.unlink(path_1.join(tmppath, file));
}
catch (err) {
this.log.error(err);
}
});
}
}
/**
* Checks if mcopy temp directory exists. If it doesn't,
* create it.
**/
async checkDir() {
let fileExists;
try {
fileExists = await fs_extra_1.exists(this.TMPDIR);
}
catch (err) {
this.log.error('Error checking for tmp dir', err);
}
if (!fileExists) {
try {
await fs_extra_1.mkdir(this.TMPDIR);
this.log.info(`Created tmpdir ${this.TMPDIR}`);
}
catch (err) {
this.log.error('Error creating tmp dir', err);
}
}
try {
await this.clearAll();
}
catch (err) {
this.log.error(err);
}
}
}
module.exports = (sys) => {
return new FFMPEG(sys);
};
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