mcopy/app/lib/ffmpeg/index.js

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'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
/** @module ffmpeg **/
const path_1 = require("path");
const fs_extra_1 = require("fs-extra");
const exec_1 = require("exec");
const child_process_1 = require("child_process");
async function spawnAsync(bin, args) {
return new Promise((resolve, reject) => {
const child = child_process_1.spawn(bin, args);
let stdout = '';
let stderr = '';
child.on('exit', (code) => {
if (code === 0) {
return resolve({ stdout, stderr });
}
else {
console.error(`Process exited with code: ${code}`);
console.error(stderr);
return reject(stderr);
}
});
child.stdout.on('data', (data) => {
stdout += data;
});
child.stderr.on('data', (data) => {
stderr += data;
});
return child;
});
}
/** @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.onProgress = () => { };
this.bin = sys.deps.ffmpeg;
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 < 8 - len; x++) {
str = '0' + str;
}
return str;
}
/**
* Parse the stderr output of ffmpeg
*
* @param {string} line Stderr line
**/
parseStderr(line) {
//frame= 6416 fps= 30 q=31.0 size= 10251kB time=00:03:34.32 bitrate= 391.8kbits/s speed= 1x
let obj = {};
if (line.substring(0, 'frame='.length) === 'frame=') {
try {
obj.frame = line.split('frame=')[1].split('fps=')[0];
obj.frame = parseInt(obj.frame);
obj.fps = line.split('fps=')[1].split('q=')[0];
obj.fps = parseFloat(obj.fps);
obj.time = line.split('time=')[1].split('bitrate=')[0];
obj.speed = line.split('speed=')[1].trim().replace('x', '');
obj.speed = parseFloat(obj.speed);
obj.size = line.split('size=')[1].split('time=')[0].trim();
}
catch (err) {
console.error(err);
console.log(line);
process.exit();
}
}
else {
}
return obj;
}
/**
* 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 = 'png';
let rgb = light.color;
let rgba = {};
let tmpoutput;
let cmd;
let output;
let fileExists = false;
let scale = '';
if (w && h) {
scale = `,scale=${w}:${h}`;
}
tmpoutput = path_1.join(this.TMPDIR, `${state.hash}-export-${padded}.${ext}`);
try {
fileExists = await fs_extra_1.exists(tmpoutput);
}
catch (err) {
//
}
if (fileExists) {
this.log.info(`File ${tmpoutput} exists`);
return tmpoutput;
}
//
cmd = `${this.bin} -y -i "${video}" -vf "select='gte(n\\,${frameNum})'${scale}" -vframes 1 -compression_algo raw -pix_fmt rgb24 -crf 0 "${tmpoutput}"`;
//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.trim()}"`);
if (rgb[0] !== 255 || rgb[1] !== 255 || rgb[2] !== 255) {
rgb = rgb.map((e) => {
return parseInt(e);
});
rgba = { r: rgb[0], g: rgb[1], b: rgb[2], a: 255 };
try {
//await Frame.blend(tmpoutput, rgba, tmpoutput);
}
catch (err) {
this.log.error(err);
}
}
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(state) {
const video = state.path;
const w = state.info.width;
const h = state.info.height;
const tmppath = this.TMPDIR;
let ext = 'png';
let tmpoutput = path_1.join(tmppath, `${state.hash}-export-%08d.${ext}`);
let args;
let output;
let estimated = -1;
//cmd = `${this.bin} -y -i "${video}" -vf "${scale}" -compression_algo raw -pix_fmt rgb24 -crf 0 "${tmpoutput}"`;
args = [
'-y',
'-i', video
];
if (w && h) {
args.push('-vf');
args.push(`scale=${w}:${h}`);
}
args = args.concat([
'-compression_algo', 'raw',
'-pix_fmt', 'rgb24',
'-crf', '0',
tmpoutput
]);
//console.dir(args)
//console.dir(state)
try {
await fs_extra_1.mkdir(tmppath);
}
catch (err) {
if (err.code && err.code === 'EEXIST') {
//directory exists
}
else {
this.log.error(err);
}
}
//ffmpeg -i "${video}" -compression_algo raw -pix_fmt rgb24 "${tmpoutput}"
return new Promise((resolve, reject) => {
let stdout = '';
let stderr = '';
this.log.info(`${this.bin} ${args.join(' ')}`);
this.child = child_process_1.spawn(this.bin, args);
this.child.on('exit', (code) => {
//console.log('GOT TO EXIT');
if (code === 0) {
console.log(stderr);
console.log(stdout);
return resolve(true);
}
else {
console.error(`Process exited with code: ${code}`);
console.error(stderr);
return reject(stderr + stdout);
}
});
this.child.stdout.on('data', (data) => {
const line = data.toString();
stdout += line;
});
this.child.stderr.on('data', (data) => {
const line = data.toString();
const obj = this.parseStderr(line);
if (obj.frame && state.frames) {
obj.progress = obj.frame / state.frames;
}
if (obj.frame && obj.speed && state.frames && state.info.fps) {
//scale by speed
obj.remaining = ((state.frames - obj.frame) / state.info.fps) / obj.speed;
obj.estimated = state.info.seconds / obj.speed;
if (obj.estimated > estimated) {
estimated = obj.estimated;
}
}
if (obj.frame) {
//log.info(`${input.name} ${obj.frame}/${input.frames} ${Math.round(obj.progress * 1000) / 10}% ${Math.round(obj.remaining)} seconds remaining of ${Math.round(obj.estimated)}`);
this.onProgress(obj);
}
});
});
}
cancel() {
if (this.child) {
this.child.kill();
this.log.info(`Stopped exporting sequence with ffmpeg`);
}
}
/**
* Clears a specific frame from the tmp directory
*
* @param {integer} frame Integer of frame to clear
*
* @returns {boolean} True if successful, false if not
**/
async clear(state) {
const padded = this.padded_frame(state.frame);
let ext = 'png';
let tmppath;
let fileExists;
tmppath = path_1.join(this.TMPDIR, `${state.hash}-export-${padded}.${ext}`);
try {
fileExists = await fs_extra_1.exists(tmppath);
}
catch (err) {
this.log.error(err);
}
if (!fileExists)
return false;
try {
await fs_extra_1.unlink(tmppath);
this.log.info(`Cleared frame ${tmppath}`);
}
catch (err) {
this.log.error(err);
}
return true;
}
/**
* Deletes 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);
}
files = files.filter((file) => {
if (file.indexOf('-export-') !== -1) {
return true;
}
return false;
});
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,
* creates 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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