mcopy/src/ffmpeg/index.ts

411 lines
10 KiB
TypeScript

'use strict';
/** @module ffmpeg **/
import { join } from 'path';
import { exists, mkdir, readdir, unlink } from 'fs-extra';
import { exec } from 'exec';
import { spawn } from 'child_process';
import Frame from 'frame';
interface FilmoutState {
frame : number;
path : string;
hash : string;
info : any;
frames?: number;
}
interface StdErr {
frame : number;
fps : number;
time : string;
speed : number;
size : string;
remaining? : number;
progress? : number;
estimated? : number;
}
async function spawnAsync (bin : string, args : string[]) {
return new Promise((resolve : Function, reject : Function) => {
const child = spawn(bin, args);
let stdout = '';
let stderr = '';
child.on('exit', (code : number) => {
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 : string) => {
stdout += data;
});
child.stderr.on('data', (data : string) => {
stderr += data;
});
return child;
});
}
/** @class FFMPEG **/
class FFMPEG {
private bin : string;
private log : any;
private id : string = 'ffmpeg';
private TMPDIR : string;
private child : any;
public onProgress : Function = () => {};
/**
* @constructor
* Creates an ffmpeg class
*
* @param {object} sys System object to be used to get temp directory
**/
constructor (sys : any) {
this.bin = sys.deps.ffmpeg;
this.TMPDIR = 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
**/
private padded_frame (i : number) {
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
**/
private parseStderr (line : string) : StdErr {
//frame= 6416 fps= 30 q=31.0 size= 10251kB time=00:03:34.32 bitrate= 391.8kbits/s speed= 1x
let obj : any = {};
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
**/
public async frame (state : FilmoutState, light : any) {
const frameNum : number = state.frame;
const video : string = state.path;
const w : number = state.info.width;
const h : number = state.info.height;
const padded : string = this.padded_frame(frameNum);
let ext : string = 'png';
let rgb : any[] = light.color;
let rgba : any = {};
let tmpoutput : string;
let cmd : string;
let output : any;
let fileExists = false;
let scale : string = '';
if (w && h) {
scale = `,scale=${w}:${h}`;
}
tmpoutput = join(this.TMPDIR, `${state.hash}-export-${padded}.${ext}`);
try {
fileExists = await 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-${padded}.png"
try {
this.log.info(cmd);
output = await exec(cmd);
} catch (err) {
this.log.error(err);
}
if (output && output.stdout) this.log.info(`"${output.stdout.trim()}"`);
if ( rgb[0] !== 255 || rgb[1] !== 255 || rgb[2] !== 255 ) {
rgb = rgb.map((e : string) => {
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 {?}
**/
public async frames (state : FilmoutState) {
const video : string = state.path;
const w : number = state.info.width;
const h : number = state.info.height;
const tmppath : string = this.TMPDIR;
let ext : string = 'png';
let tmpoutput : string = join(tmppath, `${state.hash}-export-%08d.${ext}`);
let args : string[];
let output : any;
let estimated : number = -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 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 : Function, reject : Function) => {
let stdout = '';
let stderr = '';
this.log.info(`${this.bin} ${args.join(' ')}`);
this.child = spawn(this.bin, args);
this.child.on('exit', (code : number) => {
//console.log('GOT TO EXIT');
if (code === 0) {
console.log(stderr);
console.log(stdout);
return resolve(true);
} else {
console.error(`Process exited with code: ${code}`);
console.error(stderr);
return reject(stderr + stdout);
}
});
this.child.stdout.on('data', (data : any) => {
const line : string = data.toString();
stdout += line;
});
this.child.stderr.on('data', (data : any) => {
const line : string = data.toString();
const obj : StdErr = this.parseStderr(line);
if (obj.frame && state.frames) {
obj.progress = obj.frame / state.frames;
}
if (obj.frame && obj.speed && state.frames && state.info.fps) {
//scale by speed
obj.remaining = ((state.frames - obj.frame) / state.info.fps) / obj.speed;
obj.estimated = state.info.seconds / obj.speed;
if (obj.estimated > estimated) {
estimated = obj.estimated;
}
}
if (obj.frame) {
//log.info(`${input.name} ${obj.frame}/${input.frames} ${Math.round(obj.progress * 1000) / 10}% ${Math.round(obj.remaining)} seconds remaining of ${Math.round(obj.estimated)}`);
this.onProgress(obj);
}
});
});
}
public cancel () {
if (this.child) {
this.child.kill();
this.log.info(`Stopped exporting sequence with ffmpeg`);
}
}
/**
* Clears a specific frame from the tmp directory
*
* @param {integer} frame Integer of frame to clear
*
* @returns {boolean} True if successful, false if not
**/
public async clear (state : any) {
const padded : string = this.padded_frame(state.frame);
let ext : string = 'png';
let tmppath : string;
let fileExists : boolean;
tmppath = join(this.TMPDIR, `${state.hash}-export-${padded}.${ext}`);
try {
fileExists = await exists(tmppath);
} catch (err) {
this.log.error(err);
}
if (!fileExists) return false;
try {
await unlink(tmppath);
this.log.info(`Cleared frame ${tmppath}`);
} catch (err) {
this.log.error(err);
}
return true;
}
/**
* Deletes all frames in temp directory.
*
**/
public async clearAll () {
const tmppath : string = this.TMPDIR;
let files : any;
try {
files = await readdir(tmppath);
} catch (err) {
this.log.error(err);
}
files = files.filter((file : string) => {
if (file.indexOf('-export-') !== -1) {
return true;
}
return false;
});
if (files) {
files.forEach(async (file : string, index : any) => {
try {
await unlink(join(tmppath, file));
} catch (err) {
this.log.error(err);
}
});
}
}
/**
* Checks if mcopy temp directory exists. If it doesn't,
* creates it.
**/
private async checkDir () {
let fileExists : boolean;
try {
fileExists = await exists(this.TMPDIR);
} catch (err) {
this.log.error('Error checking for tmp dir', err);
}
if (!fileExists) {
try {
await 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 : any) => {
return new FFMPEG(sys);
}