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• 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.

• unwanted bitrate reduction in MOD to mp4 conversion with ffmpeg

  18 juillet 2014, par Brian

  My Panasonic camcorder records video to a .MOD file.
  On Windows... (my linux box currently has network issues :)

  ffmpeg -i file.MOD

  yields

  bitrate: 9579 kb/s
  
  video: mpeg2video yuv 420p 704x480 [SAR 10:11 DAR 4:3] 
  
  29:97 fps, 29.97 tbr, 90k tbn, 59.94 tbc

  I tried

  ffmpeg -loglevel verbose -i file.MOD file.mp4
  
  ffmpeg -loglevel verbose -i file.MOD -qscale 0 file.mp4
  
  ffmpeg -loglevel verbose -i file.MOD -qscale 1 file.mp4

  Each of these yields the same bitrate of 2604 and a video codec of h264 (High).
  My original file was 22,786 KB and the new files are each 6,217 KB.

  My goal/purpose is for lossless conversion of the .MOD files for video editing, probably using blender.

  So my big question is "How do I do lossless video conversion of .MOD files using ffmpeg to a format that blender and other common video editing tools can work with ?"

  But for educational purposes (and posterity) I am also curious why the bitrate is being reduced by the conversions above and why there is no difference when using the -qscale argument.