Recherche avancée

Sur d’autres sites (4457)

• Nodejs youtube-dl ffmpeg audio stream

  19 septembre 2015, par Majster

  I have an issue with streaming video from YouTube. I have a http server which attempts to grab the raw video url, pull out the audio, convert it to mp3 and stream it to clients. The issue is that I’m not getting any audio on my client. Code is below (it’s all work in progress so there’s a lot of hardcoded stuff in there).

  // The obvious stuff
  
  var exec = require('child_process').exec;
  
  var spawn = require('child_process').spawn;
  
  var request = require('request');
  
  var http = require('http');
  
  
  
  //Listen for requests
  
  var server = http.createServer(function(req, response) {
  
     //This command runs youtube-dl and gets the video url
  
     var command = './node_modules/youtube-dl/bin/youtube-dl --simulate --get-url http://www.youtube.com/watch?v=5qF_qbaWt3Q';
  
     var exc = exec(command, function(error, stdout, stderr) {
  
        var downloadUrl = stdout.toString(); //Convert the buffer to string
  
        downloadUrl = downloadUrl.substring(0, downloadUrl.length - 1); //And strip the '\n' sign at the end
  
        console.log("This thing is: '" + downloadUrl + "'");
  
        response.writeHead(200, {
  
           'Content-Type': 'audio/mpeg'
  
        }); //When this is mpeg3 browser will download a blank .mp3 file now it tries to stream it
  
  
  
        //Spawn the ffmpeg child process
  
        var child = spawn('ffmpeg', ['-i', 'pipe:0', '-acodec', 'libmp3lame','-f', 'mp3', '-']);
  
        child.stdout.pipe(response); //Pipe it so it writes to our response
  
  
  
        // fs.createReadStream(filePath).pipe(child.stdin); - this is a testing thing ---> fs is filesystem and filePath is a link to a file - works
  
        request({url: downloadUrl, headers: {'Youtubedl-no-compression': 'True'}}).pipe(child.stdin); //Request the data and pipe it to ffmpeg for processing
  
     });
  
  });

  I can provide any additional info if needed. But the thing works if I try to use a file instead of request call so there is no problem with ffmpeg and other settings. Is it possible that YouTube has a protection against downloading videos this way ? I tried to paste the URL of console.log into my browser and nothing happens - no video. How can I fix this ?

• Download a part of youtube video using a powershell script

  26 octobre 2024, par Nguyễn Đức Minh

  I'm writing this Powershell script :

  


  $URL = "https://www.youtube.com/watch?v=KbuwueqEJL0"
$from = 00:06:15
$to = 00:09:17

$cmdOutput = (youtube-dl --get-url $URL) 

ffmpeg -ss $from -to $to -i  -ss $from -to $to -i  output.mkv


  


  This script's purpose is to download a part of a Youtube video. I've set the variable $URL to specify the Youtube URL, while $from and $to is the start and end time of the part I want to download.

  


  $cmdOutput is used to output the stream URL. The output would have two lines : the first one is the URL for the video stream, while the second one is the audio stream URL.

  


  Currently, I don't know how to use the output as a variable and specify the line number of $cmdOutput to put it into the correct stream. I guess and would be replaced by something like $cmdOutput[line 1], and $cmdOutput[line 2], though I know that those are incorrect.

  


  I've consulted this answer, and it is handy for me to write this script. I've also read Boris Lipschitz's answer on how to do the same thing with Python, but his answer does not work.

  


  In that script, the -ss flag inputs the seeking point, and the -t <duration></duration> flag tells FFmpeg to stop encoding after the specified duration. For example, if the start time is 00:02:00 and the duration is 00:03:00, FFmpeg would download from 00:02:00 to 00:05:00, which is not the expected outcome. For some reason, his Python script skips the first 5 seconds of output, even if I replace the -t flag with -to . I've tried to edit his script, but it does not work unless you explicitly specify the time for both video and audio stream, as well as their respective stream URL.

  


• Capture Thumbnail Whilte Downloading Youtube Video

  31 décembre 2012, par Minime

  I want to capture a thumbnail of Youtube video on certain timeline. (e.g. 3.2sec)
  I used ytdl and fluent-ffmpeg with node.js to implement it.
  It was possible to capture a thumbnail when the downloading has finished.

  var fs = require('fs');
  
  var ytdl = require('ytdl');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var videostream = fs.createWriteStream('video.flv');
  
  var myytdl = ytdl('http://www.youtube.com/watch?v=A02s8omM_hI');
  
  myytdl.pipe(videostream);
  
  videostream.on('close',function() {
  
    console.log('Downloading complete...');
  
    var proc = new ffmpeg({ source: 'video.flv', nolog: true })
  
    .withSize('150x100')
  
    .takeScreenshots(1, '/home/test', function(err) {
  
      console.log(err || 'Screenshots were saved');
  
    });
  
  });

  However, I couldn't implement to capture a thumbnail while downloading. Basic idea of what I want to do is as below.

  1. Download Youtube video starting at X sec. (Worked)
  2. Pipe it to Readable/Writable(Duplex) Memory Stream (Need Advise)
  3. During downloading, check if stream has enough data to capture the first frame, which is at X sec. (Need Advise)
  4. Capture the first frame, then stop downloading

  For 2, I've realized that node.js will have Duplex Stream on coming v0.9.x, but it seems not working properly. Anyone who has good idea to implement bullet 2,3 ?