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• FFMpeg : audio resampling changes slightly the speed of the music [on hold]

  24 octobre 2018, par thenaoh

  In my Android app, I use the FFMpeg library to extract audio samples from an audio file on the fly, and also resample them (since my file is encoded in 44100 Hz, and my device expects 48000 Hz sound).

  The problem is : even if the sound quality is perfect, the speed is a little bit higher than the regular speed of the music.

  The difference is very small (small enough so you won’t hear it), but you can hear it when you play the same song at the same time on a regular player (like VLC for example).

  I think it comes from the resampling, but I don’t know how to fix it.

  Here is my code (I get my samples thanks to the getPcmFloat() function) : https://gist.github.com/mregnauld/2538d98308ad57eb75cfcd36aab5099a

  How can I correct the speed of the music ?

  Thanks for your help.

• Seekbar issue in FFMPEG

  25 décembre 2014, par user543

  I am using FFMPEG for playing audio files. But, seeking file for some audio files are inaccurate.Means, song is playing out of total duration also. This issue is coming while seeking the audio file. If I play continuously without seek, then there is no issue. I have used below code :

   int stream_index = av_find_default_stream_index(fmt_ctx);
  
   int64_t target = av_rescale(seekValue, audio_st->time_base.den,
  
              audio_st->time_base.num);
  
   if (avformat_seek_file(fmt_ctx, stream_index, INT64_MIN, target, INT64_MAX,  
  
   AVSEEK_FLAG_FRAME) < 0) {   
  
          av_log(NULL, AV_LOG_ERROR, "ERROR av_seek_frame");
  
      } else {
  
          av_log(NULL, AV_LOG_ERROR, "SUCCEEDED av_seek_frame");
  
          avcodec_flush_buffers(fmt_ctx->streams[stream_index]->codec);
  
      }

  Any help ?

• discord.py FFMPEG Option reconnect not found

  19 avril 2021, par Lukelele

  I'm working on a music bot using discord.py, I've looked online and found that I needed to pass in ffmpeg options into discord.FFmpegPCMAudio() for the bot to not stop half way through the song. However it returns an error "Option reconnect not found."

  


  vc = await ctx.message.author.voice.channel.connect()

ydl_opts = {
    'format': 'bestaudio/best',
    'outtmpl': 'C:/Luke/YoutubeDLAudio/audio.mp3',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192'
    }],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

ffmpeg_opts = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5','options': '-vn'}   # <---------------

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download([url])

vc.play(discord.FFmpegPCMAudio(executable="C:/Luke/ffmpeg/bin/ffmpeg.exe", source="C:/Luke/YoutubeDLAudio/audio.mp3", **ffmpeg_opts))    <--------------


  


  Does anyone know the problem ? Thanks for any help.