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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 { EventEmitter } from "https://deno.land/x/event@0.2.0/mod.ts";
import { readLines } from "https://deno.land/std@0.80.0/io/mod.ts";
type Events = {
progress: [Progress];
end: [Status];
error: [string];
data:[string];
warn: [string];
test: [string];
};
interface Filters {
filterName: string;
options: Record<string, number>
}
interface Spawn {
ffmpegDir?: string;
niceness?: number;
fatalError?: boolean;
source?: string;
}
interface Status {
success: boolean;
code: number;
}
interface Progress {
ETA: Date;
percentage: number
}
export class FfmpegClass extends EventEmitter<Events> {
#input = "";
#ffmpegDir = "";
#outputFile = "";
#niceness = "";
#vbitrate: Array<string> = [];
#abitrate: Array<string> = [];
#filters: Array<string> = [];
#vidCodec: Array<string> = [];
#audCodec: Array<string> = [];
#stderr: Array<string> = [];
#aBR = 0;
#vBR = 0;
#noAudio = false;
#noVideo = false;
#outputPipe = false;
#inputIsURL = false;
#fatalError = true;
#Process!: Deno.Process;
public constructor(options?:Spawn) {
super();
if (options) {
Object.entries(options).forEach((j: Array<string>) => {
switch (j[0].toLowerCase()) {
case "fatalerror":
this.#fatalError = Boolean(j[1]);
break;
case "ffmpegdir":
this.#ffmpegDir = j[1];
break;
case "niceness":
if (Deno.build.os !== "windows") this.#niceness = j[1];
break;
case "source":
if (j[1].includes('http')) this.#inputIsURL = true;
this.#input = j[1];
break;
default:
throw 'Option "' + j[0] + '" not found! Please remove';
}
})
}
return this;
}
public setFfmpegPath(ffmpegDir: string): this {
if (ffmpegDir) this.#ffmpegDir = ffmpegDir;
return this;
}
public inputFile(input: string): this {
if (input) this.#input = input;
return this;
}
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"];
if (options) 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;
}
public pipe(): void {
this.#outputPipe = true;
this.PRIVATE_METHOD_DONT_FUCKING_USE_run();
return;
}
public save(output: string): void {
this.#outputFile = output;
this.PRIVATE_METHOD_DONT_FUCKING_USE_run();
return;
}
private async PRIVATE_METHOD_DONT_FUCKING_USE_getPipingData(): Promise<void> {
for await (const line of readLines(this.#Process.stdout!)) {
if (line) super.emit('data', line);
}
}
private async PRIVATE_METHOD_DONT_FUCKING_USE_getProgress(): Promise<void> {
let i = 1;
let temp: Array<string> = [];
let stderrStart = true;
let timeS = NaN;
let bitrate = NaN;
let totalFrames = NaN;
let encFound = 0;
for await (const line of readLines(this.#Process.stderr!)) {
if (line) {
if (line.includes('encoder')) encFound++;
if (stderrStart === true) {
this.#stderr.push(line);
if ((i == 8 && !this.#inputIsURL) || (i == 7 && this.#inputIsURL)) {
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 ((i == 9 && !this.#inputIsURL) || (i == 8 && this.#inputIsURL)) {
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 (line.includes("encoder") && (encFound > 3 || i >= 49)) {i = 0;stderrStart = false;}
} else {
if (i < 13) temp.push(line);
if (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 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:
if (this.#fatalError) throw new Error("tried to clear input. But no input was specified!\r\nIf you see this. Something is probably fucked");
console.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];
if (this.#niceness !== "") temp.push("-n", this.#niceness);
temp.push("-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));
if (this.#vidCodec.length > 0) this.#vidCodec.forEach(x => temp.push(x));
if (this.#filters.length > 0) temp.push("-vf", this.#filters.join(","));
if (this.#abitrate.length > 0) this.#abitrate.forEach(x => temp.push(x));
if (this.#vbitrate.length > 0) this.#vbitrate.forEach(x => temp.push(x));
temp.push("-progress", "pipe:2");
if (this.#outputPipe) {
temp.push("-f", "h264", "pipe:1");
} else {
temp.push(this.#outputFile);
}
return temp;
}
private PRIVATE_METHOD_DONT_FUCKING_USE_errorCheck(): void {
const errors: Array<string> = [];
if (this.#audCodec.length > 0 && (this.#audCodec.join("").includes("undefined") || this.#audCodec.includes("null"))) {errors.push("one or more audio codec options are undefined")}
if (this.#vidCodec.length > 0 && (this.#vidCodec.join("").includes("undefined") || this.#vidCodec.includes("null"))) {errors.push("one or more video codec options are undefined")}
if (this.#vbitrate.length > 0 && (this.#vBR == 0 || Number.isNaN(this.#vBR) == true)) {errors.push("video Bitrate is NaN")}
if (this.#abitrate.length > 0 && (this.#aBR == 0 || Number.isNaN(this.#aBR) == true)) {errors.push("audio Bitrate is NaN")}
if (!this.#input) {errors.push("No input specified!")}
if ((!this.#outputFile || this.#outputFile == "") && !this.#outputPipe) {errors.push("No output specified!")}
if (!this.#ffmpegDir || this.#ffmpegDir == "") {errors.push("No ffmpeg directory specified!")}
if (this.#filters.length > 0 && this.#filters.join("").includes("undefined")) {errors.push("Filters were selected, but the field is incorrect or empty")}
if (errors.length > 0) {
const errorList: string = errors.join("\r\n");
super.emit('error', errorList);
if (this.#fatalError) throw new Error(errorList);
}
return;
}
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"
});
if (this.#outputPipe) this.PRIVATE_METHOD_DONT_FUCKING_USE_getPipingData();
this.PRIVATE_METHOD_DONT_FUCKING_USE_getProgress();
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);
return;
}
}
export default function ffmpeg(options?: Spawn): FfmpegClass {
return new FfmpegClass(options);
}