html - youtube-dl 不适用于所有 youtube 视频

Question

我使用Youtube API 收集数据，然后我使用node.js影片下载。
最后，我在经典 html5 上使用视频 <video>标签。
由于某些原因，有些视频效果很好，有些则不行。
我在服务器部分使用这个包 - >
https://www.npmjs.com/package/youtube-dl

    if (request.url.search(/.nidza|.dzoni/g) != -1) {

        // file.serveFile('bad.html', 402, {}, request, response);
        const localVid = request.url.split("?vid=")
        console.log("videoID => ", localVid[1])
        console.log("Vule bule request.url., ", request.url)
        const addressLink = 'http://www.youtube.com/watch?v=' + localVid[1]
        const checkvideo = '../dist/videos/vule' + localVid[1] + '.mp4'

        try {
          if (fs.existsSync(checkvideo)) {
            // file exists
            console.log("skip...")
            response.writeHead(200, {'Content-Type': 'text/plain'});
            response.end('[video-exist]');
             return;
          }
        } catch(err) {
          console.error(err)
        }

        const myPromise = new Promise((resolve, reject) => {

          var test = youtubedl(addressLink, ['--format=18'], { cwd: __dirname })
          try{
            resolve(test)
          } catch(err) {
            reject(err)
          }

        }).then((video) => {

          video.on('info', function(info) {
            console.log('Download started')
            console.log('filename: ' + info._filename)
            console.log('size: ' + info.size)
          })

          const videoName = '../dist/videos/vule' + localVid[1] + '.mp4';
          video.pipe(fs.createWriteStream(videoName, {
            flag: "w+"
          }))

        }).catch(function(err) {
          reject().than(()=>{
            console.log("Error in promise youtubedl => ", err)
          })
        });

        response.writeHead(200, {'Content-Type': 'text/plain'})
        response.end(`VuleTube service version 0.3.1 \n
                      https://maximumroulette.com:3000 `)

      }

Link for server node.js
错误登录服务器端:

f an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)  
(node:23569) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Request contains invalid range header:  [ '0', '' ]
Error: Range request present but invalid, might serve whole file instead
    at Server.respondNoGzip (/var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:297:23)
    at Server.respond (/var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:350:14)
    at /var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:146:22
    at FSReqWrap.oncomplete (fs.js:166:5)
Range request exceeds file boundaries, goes until byte no 524287 against file size of 1312 bytes
Error: Range request present but invalid, might serve whole file instead
    at Server.respondNoGzip (/var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:297:23)
    at Server.respond (/var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:350:14)
    at /var/www/html/applications/vue-project/vue-typescript-starter/vue-ts-starter/server/node_modules/node-static/lib/node-static.js:64:22
    at FSReqWrap.oncomplete (fs.js:166:5)

有什么建议。

Answer 1

某些视频不起作用，因为 Youtube 并不总是在请求时公开其视频的网址。
Youtube-DL 向 http://www.youtube.com/get_video_info?video_id=XXXX 发出请求(其中 XXXX 是视频 ID)，这将返回一个 JSON 文本文件，其中包含与请求的视频上传相关联的 MP4/webM/M4A、OGG 等的文件 URL 列表。
例如:
(1) 正在工作:您可以找到 googlevideo.com JSON 中提到的链接(MP4 等)
匹诺曹(预告片):http://www.youtube.com/get_video_info?video_id=y8UDuUVwUzg
(2) 不工作:您找不到 googlevideo.com此 JSON 中的链接(没有可下载的视频链接)
Mirage(全片):http://www.youtube.com/get_video_info?video_id=FTY-L-l3KN8