bilibili download
// ==UserScript==
// @name bilibili download
// @name:zh bilibili 视频下载
// @namespace http://tampermonkey.net/
// @version 0.3.2
// @description bilibili视频下载 可以切换是否合并音视频 显示下载进度
// @author You
// @match https://www.bilibili.com/video/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=bilibili.com
// @require https://cdn.jsdelivr.net/npm/@ffmpeg/ffmpeg@0.11.6/dist/ffmpeg.min.js
// @grant none
// @license MIT
// ==/UserScript==
(function () {
"use strict";
// Your code here...
const CONFIG = "tampermonkey_config";
const changeDownloadMode = (userConfig = { merge: true }) => {
let config = getStorageItem(CONFIG) || {};
localStorage.setItem(
CONFIG,
JSON.stringify({
...config,
...userConfig,
})
);
};
const getStorageItem = (key) => {
let item = localStorage.getItem(key);
if (item) {
try {
item = JSON.parse(item);
} catch (error) {
item = null;
console.log(error);
}
}
return item;
};
const getPlayInfo = async () => {
const res = await fetch(window.location.href);
const str = await res.text();
return JSON.parse(str.match(/window.__playinfo__=([\d\D]+?)<\/script>/)[1]);
};
const initFFmpeg = () => {
const { createFFmpeg } = FFmpeg;
let ffmpeg = null;
if (ffmpeg === null) {
ffmpeg = createFFmpeg({ log: false });
}
if (!ffmpeg.isLoaded()) {
ffmpeg.load();
}
return ffmpeg;
};
const fetchFile = async (url) => {
const res = await fetch(url);
const reader = res.body.getReader();
const contentLength = +res.headers.get("Content-Length");
if (!contentLength) {
const data = await res.arrayBuffer();
return new Uint8Array(data);
}
let receivedLength = 0;
let chunks = [];
while (true) {
const { done, value } = await reader.read();
if (done) {
break;
}
chunks.push(value);
receivedLength += value.length;
console.log(
document.title = (receivedLength / contentLength * 100).toFixed(2) + "%"
);
}
document.title = '下载完成！';
const config = getStorageItem(CONFIG);
if (config?.merge === false) {
return new Blob(chunks);
}
let chunksAll = new Uint8Array(receivedLength);
let position = 0;
for (let chunk of chunks) {
chunksAll.set(chunk, position);
position += chunk.length;
}
return chunksAll;
};
const transcode = async (video, audio) => {
if (!ffmpeg.isLoaded()) {
await ffmpeg.load();
}
ffmpeg.FS("writeFile", "video.mp4", video);
ffmpeg.FS("writeFile", "audio.mp3", audio);
// ffmpeg -i video.mp4 -i audio.mp3 -c copy -map 0:v:0 -map 1:a:0 output.mp4
await ffmpeg.run(
...`-i video.mp4 -i audio.mp3 -c copy -map 0:v:0 -map 1:a:0 output.mp4`.split(
" "
)
);
const data = ffmpeg.FS("readFile", "output.mp4");
return new Blob([data.buffer], { type: "video/mp4" });
};
const download = async (data, fileName = "download.mp4") => {
const link = window.URL.createObjectURL(data);
const a = document.createElement("a");
a.href = link;
a.download = fileName;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
window.URL.revokeObjectURL(link);
};
const startDownload = async (videoUrl, audioUrl, fileName) => {
const config = getStorageItem(CONFIG);
const audio = await fetchFile(audioUrl);
const video = await fetchFile(videoUrl);
if (config?.merge === false) {
download(audio, `audio_${fileName}`);
download(video, `video_${fileName}`);
} else {
console.log(
`%c merge audio and video, if you do not want to merge, just need download single audio and video, please use { changeDownloadMode({merge: false}) } to change`,
"background: #222; color: #bada55"
);
const data = await transcode(video, audio);
download(data, fileName);
}
};
const addDownloadBtn = () => {
document
.querySelectorAll(
".bpx-player-ctrl-quality-menu .bpx-player-ctrl-quality-menu-item"
)
?.forEach((ele) => {
if (ele.children?.length === 1) {
const div = document.createElement("div");
div.textContent = "下载";
div.className =
"bpx-player-ctrl-quality-badge bpx-player-ctrl-quality-badge-bigvip";
div.addEventListener("click", async (e) => {
e.stopPropagation();
const fileName =
document.querySelector(".video-title.tit")?.textContent;
const playinfo = await getPlayInfo();
const dash = playinfo.data.dash;
const quality = ele.textContent;
const video =
dash.video.find((i) => quality.includes(i.height)) ||
dash.video.sort((a, b) => b.height - a.height)[0];
const audio = dash.audio[0];
startDownload(
video.baseUrl,
audio.baseUrl,
`${fileName}_${Date.now()}.mp4`
);
});
ele.appendChild(div);
}
});
};
window.changeDownloadMode = changeDownloadMode;
const ffmpeg = initFFmpeg();
document.querySelector("video").addEventListener("play", addDownloadBtn);
})();