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• Best way to have 2 youtube-dl input with ffmpeg and php

  8 janvier 2021, par Baraque Obahamas

  I'm trying to find the best way to combine a youtube-dl link in mp4 format with another youtube-dl link in m4a format to get an mp4 file through ffmpeg & php and to have an output in stdout in order to download the file directly.

  


  With only one file to convert to another format, I managed to do it easily, for example from m4a to mp3 :

  


  $cmd = "youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4 | ffmpeg -i - -f mp3 -ab 192k -";


  


  But with 2 inputs, it doesn't work :

  


  $cmd = "cat <(youtube-dl -f bestvideo[ext=mp4] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) <(youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) > ffmpeg -i - -movflags frag_keyframe+empty_moov+faststart -frag_duration 3600 -c:v copy -c:a copy -f mp4 -";


  


  In this case I get a "said into stderr : "sh : 1 : Syntax error : "(" unexpected")" error.

  


  I guess there must be a better way to do it.
I notice another problem is that on the ffmpeg command there is only one input "-i -". Now there are 2 inputs, there should be I guess "pipe:3" in addition, but so far my tests have not been conclusive.

  


  Full code :

  


  <?php
header('Content-Description: File Transfer');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header("Content-Disposition: attachment; filename=\"ok.mp4\"");
header("Content-Type: application/octet-stream");

$cmd = "cat <(youtube-dl -f bestvideo[ext=mp4] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) <(youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) > ffmpeg -i - -movflags frag_keyframe+empty_moov+faststart -frag_duration 3600 -c:v copy -c:a copy -f mp4 -";
$cmd = passthru($cmd, $status);


  


• How to limit youtube-dl on video length when downloading a youtube stream

  26 novembre 2018, par M B

  Im trying to write a small script that records a live stream from youtube.
  when using youtube-dl.download function it just keeps on downloading until the stream ends, but i want to stop downloading after 20min or so.
  the problem is when i try killing it after a while the output is corrupted (im using mp4 format), and i tried fixing it with ffmpeg but a "moov atom not found" error occurs.

  How can i make youtube-dl (or any other tool) record a fixed length of a live stream ?

  Here’s a portion of the code :

  class recordingThread (threading.Thread):
  
  def __init__(self, threadID, output_location, name, yt_stream, start_time):
  
      threading.Thread.__init__(self)
  
  
  
      self.threadID = threadID
  
      self.output = os.path.abspath(output_location)
  
      self.name = name
  
      self.start_time = start_time
  
  
  
      self.ydl_opts = {'quiet': True,
  
                       'format': 'mp4',
  
                       'outtmpl': name+ '%(ext)s',
  
                       'sleep_interval': 2
  
                       }
  
      self.yt_stream = yt_stream.strip('\'"')
  
  
  
  def run(self):
  
      print "Starting %s Thread Recorder - %s" % (self.name, self.start_time)
  
  
  
      with youtube_dl.YoutubeDL(self.ydl_opts) as ydl:
  
          self.download_prc = ydl.download([self.yt_stream])

  Thanks.

• How to limit youtube-dl on video length when downloading a youtube stream

  3 août 2016, par user3682869

  Im trying to write a small script that records a live stream from youtube.
  when using youtube-dl.download function it just keeps on downloading until the stream ends, but i want to stop downloading after 20min or so.
  the problem is when i try killing it after a while the output is corrupted (im using mp4 format), and i tried fixing it with ffmpeg but a "moov atom not found" error occurs.

  How can i make youtube-dl (or any other tool) record a fixed length of a live stream ?

  Here’s a portion of the code :

  class recordingThread (threading.Thread):
  
  def __init__(self, threadID, output_location, name, yt_stream, start_time):
  
      threading.Thread.__init__(self)
  
  
  
      self.threadID = threadID
  
      self.output = os.path.abspath(output_location)
  
      self.name = name
  
      self.start_time = start_time
  
  
  
      self.ydl_opts = {'quiet': True,
  
                       'format': 'mp4',
  
                       'outtmpl': name+ '%(ext)s',
  
                       'sleep_interval': 2
  
                       }
  
      self.yt_stream = yt_stream.strip('\'"')
  
  
  
  def run(self):
  
      print "Starting %s Thread Recorder - %s" % (self.name, self.start_time)
  
  
  
      with youtube_dl.YoutubeDL(self.ydl_opts) as ydl:
  
          self.download_prc = ydl.download([self.yt_stream])

  Thanks.