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• C# - Discord.Net - Trying to read audio from soundcloud and transmit it to discord

  28 mars 2022, par Bruno Braga

  I am currently working on a discord bot that is able to play a song using soundcloud.
Unfortunately, I can't seem to figure out how to get it to read from the url and stream it !
The bot it made in C#, and uses Discord.net library and ffmpeg for the audio.
Would love to hear some suggestions !

  


  These are the three functions involved :

  


  [Command("teste", RunMode = RunMode.Async)]
public async Task Play(IVoiceChannel channel = null)
{
    var audioClient = await JoinChannel(channel);
    var url = "https://soundcloud.com/campatechlive/campatech-live-feat- 
        matheus-moussa-arabian-system-vol-2-psy-trance-150-original-mix";

    var ffmpeg = new Ffmpeg(audioClient);
    await ffmpeg.SendAsync(url);
}

public async Task SendAsync(string path)
{
    using (var ffmpeg = CreateStream(path))
    using (var output = ffmpeg.StandardOutput.BaseStream)
    using (var discord = _client.CreatePCMStream(AudioApplication.Mixed))
    {
        try { await output.CopyToAsync(discord); }
        finally { await discord.FlushAsync(); }
    }
}

private Process? CreateStream(string path)
{
    return Process.Start(new ProcessStartInfo
    {
        FileName = "ffmpeg",
        Arguments = $"-hide_banner -loglevel panic -i \"{path}\" -ac 2 -f 
        s16le -ar 48000 pipe:1",
        UseShellExecute = false,
        RedirectStandardOutput = true,
    });
}


  


  I'm guessing it's something on the ffmpeg arguments, but can't kind of figure out what.

  


  I've tried a bunch of different arguments on ffmpeg, but none of them worked.
Anyone can lend me a hand ?

  


• FFMPEG make adjustment on first frame

  30 avril 2022, par iDeveloper

  I am using FFMPEG library to convert images to video file in my software program.

  


  Here frameRate is 1 or 5. So, I need a dynamic image based on time for first 5 seconds. So, in the images folder if there is more than 10 images then I set frameRate as 5 for else frame rate is 1

  


  Algorithm :

  


  let startNumber: Int
let blackFrame  = self.sourceURL.appendingPathComponent("TIME_STAMP.jpg", isDirectory: false)
    
    if FileManager.default.fileExists(atPath: blackFrame.path){
       
        let data = try! Data(contentsOf: blackFrame)
        
        try? FileManager.default.removeItem(at: blackFrame)

        if frameRate == "1"{
            
            startNumber = 20
            
            for i in 20...24{
                
                let url = sourceURL.appendingPathComponent("img\(i).jpg", isDirectory: false)
                try? data.write(to: url)
            }
            
        }else{
            
            startNumber = 0
            for i in 0...24{
                
                let url = sourceURL.appendingPathComponent("img\(i).jpg", isDirectory: false)
                try? data.write(to: url)
            }
        }
        
    }else{
        
        startNumber = 25
    }
 
    let arguments: [String] = [
        "-y",
        "-framerate", frameRate,
        "-start_number",  "\(startNumber)",
        "-i", "\(sourceURL.path)/img%0d.jpg",
        "-c:v", "libx264",
        "-crf", "28",
        outputURL.path
    ]


  


  This is how I am constructing the arguments. It's working perfect on fast systems. but for slow systems the creation of custom time image takes time than the FFMPEG execution. So, the output video file is mixed of various frames instead of 1....N ;

  


  So, I don't want to create the 5 or 25 images each time. Instead can am I able to set frame rate for first image only ? or is there any alternative ?

  


  Thank you !

  


• FFMPEG Queue input backward in time

  2 avril 2022, par Spartan 117

  I am trying to combine two audio files, and delaying the second one. Here's my command

  


  ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka


  


  Here is the output that i'm getting, and it's causing an issue where the second audio is delayed by 5 hours and 45 minutes rather than 3 hours and 45 minutes

  


   ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka
ffmpeg version n5.0-4-g911d7f167c-20220311 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librist --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220311
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
Input #0, matroska,webm, from 'RTb295d0534191e1acb22a45bb971a12e6.mka':
  Metadata:
    encoder         : GStreamer matroskamux version 1.16.2
    creation_time   : 2022-03-23T21:20:27.000000Z
  Duration: 03:45:00.47, start: 0.291000, bitrate: 19 kb/s
  Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      title           : Audio
Input #1, matroska,webm, from 'RT103bfe5f4b129860f69cd8e820f3a10b.mka':
  Metadata:
    encoder         : GStreamer matroskamux version 1.16.2
    creation_time   : 2022-03-24T01:05:30.000000Z
  Duration: 02:45:03.51, start: 13502.587000, bitrate: 5 kb/s
  Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      title           : Audio
Stream mapping:
  Stream #0:0 (opus) -> amix
  Stream #1:0 (opus) -> adelay:default
  amix:default -> Stream #0:0 (libvorbis)
Press [q] to stop, [?] for help
Output #0, matroska, to 'combined_audio.mka':
  Metadata:
    encoder         : Lavf59.16.100
  Stream #0:0: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp
    Metadata:
      encoder         : Lavc59.18.100 libvorbis
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time231x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time184x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time189x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time223x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time275x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time245x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time213x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time209x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time208x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time204x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time199x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time193x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time185x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time181x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time178x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time177x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time176x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time169x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time167x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time163x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time146x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time139x
size=   75141kB time=06:07:52.57 bitrate=  27.9kbits/s speed= 130x
video:0kB audio:70470kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 6.628071%


  


  The audio files being mixed together - https://www.easyupload.io/m/durisk

  


  How can i resolve this issue ?