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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| import { Readable } from "node:stream"; | ||
| import fetch from "node-fetch"; | ||
|
|
||
| export enum AudioQuality { | ||
| Low = "AUDIO_QUALITY_LOW", | ||
| Medium = "AUDIO_QUALITY_MEDIUM", | ||
| High = "AUDIO_QUALITY_HIGH" | ||
| } | ||
|
|
||
| export interface VideoInfo { | ||
| streamingData: { | ||
| expiresInSeconds: string; | ||
| adaptiveFormats: { | ||
| url: string; | ||
| mimeType: string; | ||
| bitrate: number; | ||
| width?: number; | ||
| height?: number; | ||
| fps?: number; | ||
| quality: string; | ||
| audioQuality?: string; | ||
| qualityLabel?: string; | ||
| audioSampleRate?: string; | ||
| }[]; | ||
| }; | ||
| } | ||
|
|
||
| export async function getYTInfo(videoId: string): Promise<VideoInfo> { | ||
| // hard-coded from https://github.com/yt-dlp/yt-dlp/blob/master/yt_dlp/extractor/youtube.py | ||
| const apiKey = "AIzaSyB-63vPrdThhKuerbB2N_l7Kwwcxj6yUAc"; | ||
|
|
||
| const headers = { | ||
| "X-YouTube-Client-Name": "5", | ||
| "X-YouTube-Client-Version": "19.09.3", | ||
| Origin: "https://www.youtube.com", | ||
| "User-Agent": "com.google.ios.youtube/19.09.3 (iPhone14,3; U; CPU iOS 15_6 like Mac OS X)", | ||
| "content-type": "application/json" | ||
| }; | ||
|
|
||
| const b = { | ||
| context: { | ||
| client: { | ||
| clientName: "IOS", | ||
| clientVersion: "19.09.3", | ||
| deviceModel: "iPhone14,3", | ||
| userAgent: "com.google.ios.youtube/19.09.3 (iPhone14,3; U; CPU iOS 15_6 like Mac OS X)", | ||
| hl: "en", | ||
| timeZone: "UTC", | ||
| utcOffsetMinutes: 0 | ||
| } | ||
| }, | ||
| videoId, | ||
| playbackContext: { contentPlaybackContext: { html5Preference: "HTML5_PREF_WANTS" } }, | ||
| contentCheckOk: true, | ||
| racyCheckOk: true | ||
| }; | ||
|
|
||
| return fetch(`https://www.youtube.com/youtubei/v1/player?key${apiKey}&prettyPrint=false`, { method: "POST", body: JSON.stringify(b), headers }).then(r => r.json()); | ||
| } | ||
|
|
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| export async function streamYTAudio(videoId: string, quality: AudioQuality = AudioQuality.Medium) { | ||
| const info = await getYTInfo(videoId); | ||
| const audio = info.streamingData.adaptiveFormats.find(f => f.audioQuality === quality); | ||
|
|
||
| if (!audio) | ||
| throw new Error(`No audio found for quality ${quality}`); | ||
|
|
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| const { body } = await fetch(audio.url); | ||
|
|
||
| return Readable.from(body); | ||
| } |
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