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• Alternate ways to play music on discord bot

  29 mars 2021, par Sathvik K S

  I am currently using youtube-dl along with ffmpeg to play songs from my discord bot. However, searching for the song, downloading the video and extracting the audio takes a long time.

  


  So I wanted to know if there is any way to speed up the process so the music can be played almost instantaneously.

  


• Faster way to write image to Process.StandardInput.BaseStream

  4 septembre 2012, par Hasibii

  Im trying to send a lot of desktop captured images to an encoders (FFmpeg) stdin.

  The following code example works.

  the CaptureScreen() function provides an image in 5-10 ms.

  If I save the image in a MemoryStream it takes almost no time.

  But I can only save 1 image every 45 ms to
  proc.StandardInput.BaseStream.

  public void Start(string bitrate, string buffer, string fps, string rtmp, string resolution, string preset)
  
  {
  
      proc.StartInfo.FileName = myPath + "\\ffmpeg.exe";
  
      proc.StartInfo.Arguments = "-f image2pipe -i pipe:.bmp -vcodec libx264 -preset " + preset + " -maxrate " + bitrate + "k -bufsize " +
  
      buffer + "k -bt 10 -r " + fps + " -an -y test.avi"; //+ rtmp;
  
      proc.StartInfo.UseShellExecute = false;
  
      proc.StartInfo.RedirectStandardInput = true;
  
      proc.StartInfo.RedirectStandardOutput = true;
  
  
  
      proc.Start();
  
  
  
      Stopwatch st = new Stopwatch();
  
      BinaryWriter writer = new BinaryWriter(proc.StandardInput.BaseStream);
  
      System.Drawing.Image img;
  
  
  
      st.Reset();
  
      st.Start();
  
  
  
      for (int z = 0; z < 100; z++)
  
      {
  
          img = ScrCap.CaptureScreen();
  
          img.Save(writer.BaseStream, System.Drawing.Imaging.ImageFormat.Bmp);
  
          img.Dispose();
  
      }
  
  
  
      st.Stop();
  
      System.Windows.Forms.MessageBox.Show(st.ElapsedMilliseconds.ToString());
  
  }

  The question is :

  Can I do the saving process faster ?

  I try to get stable 60 fps this way

• ffmpeg specify image start/end time by seconds in slideshow

  31 décembre 2022, par Martin

  I have an ffmpeg command that when ran on command prompt in win10, will combine 2 mp3 files and 1 image file into a low resolution .mkv video file.

  


  06:23 = 383 = song1.mp3 length
05:40 = 340 = song2.mp3 length
12:03 = 723 = estimated total video length
12:04 = 724 = actual video length


  


  Command that generates video file :

  


  ffmpeg -loop 1 -framerate 2 -i images/img1.png  -i "audio files/song1.mp3"  -i "audio files/song2.mp3"  -c:a pcm_s32le  -filter_complex concat=n=2:v=0:a=1  -vcodec libx264  -bufsize 3M  -filter:v "scale=w=640:h=638,pad=ceil(iw/2)*2:ceil(ih/2)*2"  -crf 18  -pix_fmt yuv420p  -shortest  -tune stillimage  -t 724 audioAndImageIntoVideo.mkv 


  


  The current command just uses -i images/img1.png as a static image for the entire video. But I want to have one image for the duration of the first song, and a second image for the duration of the second song. With a timeline like so :

  


  song1.mp3 and img1.png start at 00:00 and end at 06:23 ( 383 seconds )
song2.mp3 and img2.png start at 06:23 ( 383 seconds ) and end at 12:03 ( 723 seconds )


  


  is there any flag to specify the timeline of two images ? Right now I am just trying to get them in order in a video, and then I can change the individual img resolution / size / stretching details for how it fills the frame