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• How to debug "Error in pull function & Input buffer exhausted" ?

  15 septembre 2021, par user16909319

  Introduction :

  


  I'm working on a Discord Music Bot for personal use only. Basically, when I play a 2min song with the bot, it plays the song for 1min 30secs, then skips it and plays the next one in the queue. The error is shown below :

  


  


  Error in Pull Function
  
IO error : Error number -10054 occurred
  
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000018f86a6f4c0] Packet corrupt (stream = 0, dts = 11154432).
  
Input buffer exhausted before END element found
  
Invalid Data found when processing Input
  
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000018f86a6f4c0] stream 0, offset 0x3e805c : partial file

  


  


  The code block which I think is causing the problem :

  


  Search song method

  


      async def search_song(self, amount, song, get_url=False):
        info = await self.bot.loop.run_in_executor(None, lambda: youtube_dl.YoutubeDL(ytdl_format_options).extract_info(
            f"ytsearch{amount}:{song}", download=False, ie_key="YoutubeSearch"))
        if len(info["entries"]) == 0: return None

        return [entry["webpage_url"] for entry in info["entries"]] if get_url else info


  


  Play_song method

  


      async def play_song(self, ctx, song):
        url = pafy.new(song).getbestaudio().url
        ctx.voice_client.play(discord.PCMVolumeTransformer(discord.FFmpegPCMAudio(url, executable="C:/ffmpeg/bin/ffmpeg.exe")),
                              after=lambda error: self.bot.loop.create_task(self.check_queue(ctx)))
        ctx.voice_client.source.volume = 0.5


  


  Formatting Options I provided :

  


  ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': True,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0'
}


  


  Solutions that I've tried :

  


  

  • Running it on both Replit and locally.

  


  • Redownloading FFmpeg

  


  • Ensuring FFmpeg, pafy, and youtube_dl are all up to date.

  


  


  Things to Note :

  


  

  • Playing a 2mins song, it stops after 1min 30 seconds and displays the error above. (75% of the song)

  


  • Playing a 1hr song, it still continues after 10 minutes.

  


  


  I do not have much experience in this yet so I'm not entirely sure where in my code is actually causing this issue or other ways which I can use to test and fix the issue.

  


• C# console app to process FFMPEG jpg stream output

  15 septembre 2014, par Gabriel Barzola

  I am looking some tip or idea in order to process an stream of jpg files created by a fFMPEG command.

  There is a way to split the outpuStream to capture each jpg file ?

  Here is the command
  ffmpeg -i rtsp ://somertsp:554 -an -f image2pipe -vf fps=fps=5 -

  I execute that command using a C# application.

  Here is a example code

  class Program
  
  {
  
      private static BackgroundWorker worker;
  
      private static MemoryStream buffer = new MemoryStream();
  
      private static BinaryWriter bufferWriter = new BinaryWriter(buffer);
  
  
  
      static void Main(string[] args)
  
      {
  
          string file = @"C:\ffmpeg\bin\ffmpeg.exe";
  
          string arguments = @"-i rtsp://xxx:yyy@v5demo.wavestore.com:554/rtsp/00004 -an -f image2pipe -vf fps=fps=5 -qscale 0 -";
  
  
  
          var processStartInfo = new ProcessStartInfo(file, arguments);
  
          processStartInfo.CreateNoWindow = false;
  
          processStartInfo.RedirectStandardError = true;
  
          processStartInfo.RedirectStandardOutput = true;
  
          processStartInfo.UseShellExecute = false;
  
  
  
          worker = new BackgroundWorker();
  
          worker.DoWork += worker_DoWork;
  
          worker.WorkerReportsProgress = true;
  
          worker.ProgressChanged += worker_ProgressChanged;
  
  
  
          var process = new Process();
  
          process.StartInfo = processStartInfo;
  
          process.Start();
  
  
  
          worker.RunWorkerAsync(process);
  
          process.WaitForExit();
  
  
  
      }
  
  
  
      static void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
  
      {
  
          // save the image
  
      }
  
  
  
      static void worker_DoWork(object sender, DoWorkEventArgs e)
  
      {
  
          try
  
          {
  
  
  
              var internalWorker = sender as BackgroundWorker;
  
              Process p = e.Argument as Process;
  
              buffer = new MemoryStream();
  
              bufferWriter = new BinaryWriter(buffer);
  
              using (var reader = new BinaryReader(p.StandardOutput.BaseStream))
  
              {
  
                  while (true)
  
                  {
  
                     //get the jpg image
  
                  }
  
              }
  
  
  
          }
  
          catch (Exception ex)
  
          {
  
            // Log the error, continue processing the live stream
  
          }
  
      }        
  
  }

• cannot seek to frame 0 in opencv ?

  12 décembre 2017, par Wang

  For some video I cannot seek to frame <11 with cap.set(cv2.CAP_PROP_POS_FRAMES, x). Any x <11 will result in seek to frame 11th. any x<=0 will result in seek to frame 10th.
  Why does this happen ? How can I fix this ?

  def check_frame_seek(fname, frames, x, msec=False, seek=True):
  
      cap = cv2.VideoCapture(fname)
  
      _info = "start frame: {:d}; seek to {}".format(
  
          int(cap.get(cv2.CAP_PROP_POS_FRAMES)),
  
          x
  
      )
  
      if seek:
  
          if msec:
  
              _ret = cap.set(cv2.CAP_PROP_POS_MSEC, x)
  
              _info +="ms;"
  
          else:
  
              _ret = cap.set(cv2.CAP_PROP_POS_FRAMES, x)
  
              _info +="frame;"
  
          _info += "support seek?({});".format(_ret)
  
      _ret, framenow = cap.read()
  
  
  
      if _ret:
  
          for _i, _frame in enumerate(frames):
  
              if not _frame is None:
  
                  if (np.all(framenow == _frame)):
  
                      _info +="loaded=={}.".format(_i)
  
      else:
  
          _info += "cannot read."
  
      cap.release()
  
      print(_info)
  
  
  
  
  
  def load_all_frames(fname):
  
      cap = cv2.VideoCapture(fname)
  
      frames = []
  
      _ret, _frame = cap.read()
  
      while (_ret):
  
          print(
  
              "frame: {:d}".format(
  
                  int(cap.get(cv2.CAP_PROP_POS_FRAMES))
  
              )
  
          )
  
          frames.append(_frame)
  
          _ret, _frame = cap.read()
  
      print(
  
          "total frame number: {}; cap.get = {}".format(
  
              len(frames),
  
              cap.get(cv2.CAP_PROP_FRAME_COUNT)
  
          )
  
      )
  
      return frames
  
  
  
  def main():
  
      fname = "video"
  
      frames  = load_all_frames(fname)
  
  
  
      check_frame_seek(fname, frames, 0)
  
      check_frame_seek(fname, frames, -1)
  
      check_frame_seek(fname, frames, 49)
  
      check_frame_seek(fname, frames, 50)
  
      check_frame_seek(fname, frames, 51)
  
      check_frame_seek(fname, frames, 1)
  
      check_frame_seek(fname, frames, 10)
  
      check_frame_seek(fname, frames, 11)
  
      check_frame_seek(fname, frames, 12)
  
      check_frame_seek(fname, frames, 30)

  The out put is :

  total frame number: 50; cap.get = 49.0
  
  
  
  [h264 @ 0x55aabd321540] Missing reference picture
  
  [h264 @ 0x55aabd321540] decode_slice_header error
  
  [h264 @ 0x55aabd350120] Missing reference picture
  
  [h264 @ 0x55aabd3505e0] Missing reference picture
  
  [h264 @ 0x55aabd350aa0] reference picture missing during reorder
  
  [h264 @ 0x55aabd350aa0] reference picture missing during reorder
  
  [h264 @ 0x55aabd350aa0] reference picture missing during reorder
  
  [h264 @ 0x55aabd350aa0] Missing reference picture
  
  [h264 @ 0x55aabd350aa0] Missing reference picture
  
  [h264 @ 0x55aabd350aa0] Missing reference picture
  
  [h264 @ 0x55aabd321540] Missing reference picture
  
  [h264 @ 0x55aabd350120] mmco: unref short failure
  
  [h264 @ 0x55aabd350aa0] reference picture missing during reorder
  
  [h264 @ 0x55aabd350aa0] Missing reference picture
  
  start frame: 0; seek to 0frame;support seek?(True);loaded==10.
  
  start frame: 0; seek to -1frame;support seek?(True);loaded==10.
  
  start frame: 0; seek to 49frame;support seek?(True);loaded==49.
  
  start frame: 0; seek to 50frame;support seek?(True);loaded==49.
  
  start frame: 0; seek to 51frame;support seek?(True);loaded==49.
  
  start frame: 0; seek to 1frame;support seek?(True);loaded==11.
  
  start frame: 0; seek to 10frame;support seek?(True);loaded==11.
  
  start frame: 0; seek to 11frame;support seek?(True);loaded==11.
  
  start frame: 0; seek to 12frame;support seek?(True);loaded==12.
  
  start frame: 0; seek to 30frame;support seek?(True);loaded==30.

  The ffprobe result of the problematic videos :

  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1920x1080 [SAR 16:15 DAR 256:135], 50 fps, 50 tbr, 90k tbn, 100 tbc

  The ffmpeg :

  ffmpeg version 3.3.3 
  
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --disable-ffserver --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libtheora --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc --enable-libzimg
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100