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mod.ts
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mod.ts
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/**
* Written & Maintained by only Christiaan 'MierenMans' van Boheemen
* Property of Christiaan van Boheemen
*/
import * as path from "https://deno.land/std@0.79.0/path/mod.ts";
import { EventEmitter } from "https://deno.land/x/event@0.2.0/mod.ts";
import { readLines } from "https://deno.land/std@0.79.0/io/mod.ts";
import { assert } from "https://deno.land/std@0.79.0/testing/asserts.ts"
type Events = {
progress: [Progress];
end: [Status];
error: [string]
}
interface Filters {
filterName: string;
options: Record<string, unknown>
}
// interface SpawnOptions {
// timeout: number,
// niceness: number,
// logger: string,
// stdoutLines: number
// }
interface Spawn {
ffmpegDir: string;
// options: SpawnOptions,
fatalError?: boolean
}
interface Status {
success: boolean;
code: number;
}
interface Progress {
ETA: Date;
percentage: number
}
export class ffmpeg extends EventEmitter<Events> {
#input: string = "";
#ffmpegDir: string = "";
#outputFile: string = "";
#vbitrate: Array<string> = [];
#abitrate: Array<string> = [];
#filters: Array<string> = [];
#vidCodec: Array<string> = [];
#audCodec: Array<string> = [];
#stderr: Array<string> = [];
#aBR: number = 0;
#vBR: number = 0;
#noAudio: boolean = false;
#noVideo: boolean = false;
#Process!: Deno.Process;
public constructor(...param: Array<string|Spawn>) {
super();
param.forEach(x => {
if (typeof x == "string") {
this.#input = x;
}
if (typeof x == "object") {
Object.entries(x).forEach(j => {
switch (j[0].toLowerCase()) {
case "source":
this.#input = j[1];
break;
case "ffmpegdir":
this.#ffmpegDir = path.resolve(j[1]);
}
})
}
})
return this;
}
public setFfmpegPath(ffmpegDir: string): this {
if (ffmpegDir) this.#ffmpegDir = path.resolve(ffmpegDir);
return this;
}
public inputFile(input: string): this {
this.#input = input;
return this;
}
public save(output: string): void {
this.#outputFile = output;
this.PRIVATE_METHOD_DONT_FUCKING_USE_run();
return;
}
public noAudio(): this {
this.#noAudio = true;
return this;
}
public noVideo(): this {
this.#noVideo = true;
return this;
}
public audioCodec(codec: string, options: Record<string, string>): this {
this.#audCodec = ["-c:a", codec];
if (codec == "" || codec == "null" || codec == "undefined") this.#audCodec = ["-c:a", "undefined"];
Object.entries(options).forEach(x => this.#audCodec.push("-" + x[0], x[1]));
return this;
}
public videoCodec(codec: string, options: Record<string, string>): this {
this.#vidCodec = ["-c:v", codec];
if (codec == "" || codec == "null" || codec == "undefined") this.#vidCodec = ["-c:v", "undefined"];
if (options) Object.entries(options).forEach(x => this.#vidCodec.push("-" + x[0], x[1]));
return this;
}
public audioBitrate(bitrate: number): this {
this.#aBR = bitrate;
this.#abitrate = ["-b:a", String(bitrate)];
return this;
}
public videoBitrate(bitrate: number|string, cbr = true): this {
const brString = String(bitrate);
this.#vBR = parseInt(brString);
let bitR: number;
switch (brString.charAt(brString.length-1).toLowerCase()) {
case "m":
bitR = parseInt(brString) * 1000000;
break;
case "k":
default:
bitR = parseInt(brString) * 1000;
break;
}
this.#vbitrate = ['-maxrate', String(bitR), '-minrate', String(bitR), "-b:v", String(bitR), '-bufsize', '3M'];
if (cbr == false) this.#vbitrate = ['-maxrate', String(bitR * 2), '-minrate', String(bitR / 4), "-b:v", String(bitR), '-bufsize', String(bitR * 5)];
return this;
}
public videoFilters(...Filters:Array<Filters>): this {
Filters.forEach(x => {
let temp: string = x.filterName + '="';
Object.entries(x.options).forEach((j, i) => {
if (i > 0) {temp += `: ${j[0]}='${j[1]}'`} else {temp += `${j[0]}='${j[1]}'`}
})
this.#filters.push(temp);
})
return this;
}
private PRIVATE_METHOD_DONT_FUCKING_USE_errorCheck(): void {
const error: Array<string> = [];
if (this.#audCodec.length > 0 && (this.#audCodec.join("").includes("undefined") || this.#audCodec.includes("null"))) {error.push("one or more audio codec options are undefined")}
if (this.#vidCodec.length > 0 && (this.#vidCodec.join("").includes("undefined") || this.#vidCodec.includes("null"))) {error.push("one or more video codec options are undefined")}
if (this.#vbitrate.length > 0 && (this.#vBR == 0 || Number.isNaN(this.#vBR) == true)) {error.push("video Bitrate is NaN")}
if (this.#abitrate.length > 0 && (this.#aBR == 0 || Number.isNaN(this.#aBR) == true)) {error.push("audio Bitrate is NaN")}
if (!this.#input) {error.push("No input specified!")}
if (!this.#outputFile || this.#outputFile == "") {error.push("No output specified!")}
if (!this.#ffmpegDir || this.#ffmpegDir == "") {error.push("No ffmpeg directory specified!")}
if (this.#filters.length > 0 && this.#filters.join("").includes("undefined")) {error.push("Filters were selected, but the field is incorrect or empty")}
if (error.join("") !== "") {
const errors: string = error.join("\r\n");
super.emit('error', errors);
}
return;
}
private PRIVATE_METHOD_DONT_FUCKING_USE_clear(input: string): void {
switch (input.toLowerCase()) {
case "audio":
this.#audCodec = [];
this.#aBR = 0;
this.#abitrate = [];
break;
case "video":
this.#vidCodec = [];
this.#vBR = 0;
this.#vbitrate = [];
this.#filters = [];
break;
default:
throw new Error("tried to clear input. But no input was specified!\r\nIf you see this. Something is probably fucked")
}
return;
}
private PRIVATE_METHOD_DONT_FUCKING_USE_formatting(): Array<string> {
const temp = [this.#ffmpegDir, "-hide_banner", "-nostats","-y", "-i", this.#input];
if (this.#noAudio) {
temp.push("-an")
this.PRIVATE_METHOD_DONT_FUCKING_USE_clear("audio");
}
if (this.#noVideo) {
temp.push("-vn");
this.PRIVATE_METHOD_DONT_FUCKING_USE_clear("video")
}
if (this.#audCodec.length > 0) this.#audCodec.forEach(x => temp.push(x)) // Push audio codec
if (this.#vidCodec.length > 0) this.#vidCodec.forEach(x => temp.push(x)) // Push video codec
if (this.#filters.length > 0) temp.push("-vf", this.#filters.join(",")) // Push all Filters
if (this.#abitrate.length > 0) this.#abitrate.forEach(x => temp.push(x)) // Push audio bitrate
if (this.#vbitrate.length > 0) this.#vbitrate.forEach(x => temp.push(x)) // Push video bitrate
temp.push("-progress", "pipe:2", this.#outputFile);
return temp;
}
private async PRIVATE_METHOD_DONT_FUCKING_USE_getStdout(): Promise<void> {
let i = 0;
let temp: Array<string> = [];
let stderrStart = true;
let timeS = NaN;
let bitrate = NaN;
let totalFrames = NaN;
for await (const line of readLines(this.#Process.stderr!)) {
if (line) {
if (stderrStart) this.#stderr.push(line);
if (stderrStart === true && i == 7) {
const dur: string = line.trim().replaceAll("Duration: ", "");
const timeArr: Array<string> = dur.substr(0, dur.indexOf(",")).split(":");
timeS = ((Number.parseFloat(timeArr[0]) * 60 + parseFloat(timeArr[1])) * 60 + parseFloat(timeArr[2]));
}
if (stderrStart === true && i == 8) {
const string: string = line.trim();
bitrate = Number.parseFloat(string.substr(string.indexOf('], '), string.indexOf('kb/s,') - string.indexOf('], ')).replaceAll("], ", "").trim());
totalFrames = timeS * Number.parseFloat(string.substr(string.indexOf('kb/s,'), string.indexOf('fps') - string.indexOf('kb/s,')).replaceAll("kb/s,", "").trim());
}
if (stderrStart === false && i < 13) temp.push(line)
if (stderrStart === true && i == 38) {i = 0;stderrStart = false;}
if (stderrStart === false && i == 12) {
if (temp[0] == "progress=end") return;
let frame: number = Number.parseInt(temp[0].replaceAll("frame=", "").trim());
let fps: number = Number.parseFloat(temp[1].replaceAll("fps=", "").trim()) + 0.01;
if (temp[0].includes("frame= ")) {
frame = Number.parseInt(temp[1].replaceAll("frame=", "").trim());
fps = Number.parseFloat(temp[2].replaceAll("fps=", "").trim()) + 0.01;
}
const progressOBJ: Progress = {
ETA: new Date(Date.now() + (totalFrames - frame) / fps * 1000),
percentage: Number.parseFloat((frame / totalFrames * 100).toFixed(2))
}
if (!Number.isNaN(fps) && !Number.isNaN(frame)) super.emit('progress', progressOBJ);
i = 0;
temp = [];
}
i++
}
}
}
private async PRIVATE_METHOD_DONT_FUCKING_USE_run(): Promise<void> {
await this.PRIVATE_METHOD_DONT_FUCKING_USE_errorCheck();
this.#Process = Deno.run({
cmd: await this.PRIVATE_METHOD_DONT_FUCKING_USE_formatting(),
stderr: "piped",
stdout: "piped"
});
this.PRIVATE_METHOD_DONT_FUCKING_USE_getStdout();
const status = await this.#Process.status()
await this.#Process.close();
if (status.success == false) super.emit('error', this.#stderr.join('\r\n'))
super.emit('end', status);
}
}