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• Downloading an HLS stream : ONLY in sync when downloading with ffmpeg. Possible explanations ? [closed]

  20 janvier 2024, par R.JEON

  I'm trying to download a livestream that is just a plain hls with no encryption.
I usually use streamlink, but this site I'm trying to use recently doesn't output a correct video/audio synced output when downloaded with streamlink/yt-dlp/nm3u8dl etc.

  


  The only option that produces the correct output with the audio and video in sync is ffmpeg, but ffmpeg is very user-unfriendly and lacks functionality related to retries when connection is lost, and etc.

  


  This is super weird cuz when I play the hls stream using VLC or any other livestream supported players, they are on sync. But what I do noticed is that when I play them on a player, the audio is mute for a second or two and then plays the audio correctly.

  


  Can anyone possibly explain the cause of this situation and probably a fix ? I would love to use streamlink instead of ffmpeg.

  


• Convert ogg to mp3 with fluent-ffmpeg [closed]

  19 octobre 2023, par Rougher

  I have the next code :

  


  ffmpeg(oggFileName)
    .format('ogg')
    .audioCodec('libopus')
.on("error", (err) => {
    log.error(`Failed to convert ${oggFileName} to mp3`, err);

    return;
}).on("end", async () => {
   //TODO: do something
}).save(mp3File);


  


  This code works perfectly on Windows, but on Ubuntu converted mp3 file contains silence only.

  


  My ffmpeg on Ubuntu :


  


  Another weird thing, if I run this code via Ubuntu terminal it also works properly :

  


  ffmpeg -i 1.ogg -c:a libopus 2.mp3


  


  Should I install any additional libraries for solving my issue ?

  


• FFmpeg - Can't redirect standard output stream

  4 janvier 2017, par Ryan Vancity Gosling

  I’m running FFmpeg throught my C# application to encode an video. To try an get the progress of the video, I’ve redirected the output but there seems to be no output. I tried the same with FFProbe and it worked perfectly. Just doesn’t work for FFmpeg.

   var FFmpeg = new Process
  
          {
  
              StartInfo = new ProcessStartInfo
  
              {
  
                  FileName = Directory.GetCurrentDirectory() + "\\FFmpeg\\ffmpeg.exe",
  
                  Arguments = CurrentArgs,
  
                  UseShellExecute = false,
  
                  RedirectStandardOutput = true,
  
                  CreateNoWindow = false
  
              }
  
          };
  
          FFmpeg.Start();
  
  
  
          string line;
  
          int i = 0;
  
          while (!FFmpeg.StandardOutput.EndOfStream)
  
          {
  
              i = i + 1;
  
          }

  And the weird thing is that I have the console window enabled on my WPF project and the output is shown although there isnt any code to write it to the console. And the loop is not iterating. The FFProbe output didn’t show up on console like this.

  Can someone help me. I need to get a percentage of the FFmpeg encoding process.