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• Naudio produces wierd noise with ffmpeg

  7 décembre 2020, par Sfue

  Hi there I was trying to make a music player in c# using the windows form and I ended up something like this -

  


  var ffmpeg = Process.Start(new ProcessStartInfo
            {
                FileName = "ffmpeg",
                Arguments = $@"-loglevel panic -i ""path/to/my-music.mp3"" -ac 2 -f s16le -ar 44100 pipe:1",
                UseShellExecute = false,
                CreateNoWindow = true,
                RedirectStandardOutput = true
            }); 
            var p = new RawSourceWaveStream(ffmpeg.StandardOutput.BaseStream,new WaveFormat(44100 , 16, 1));
waveOutDevice.Init(p);
waveOutDevice.Play();


  


  But it seems to produce some weird cracking noises , I have been trying it out since 2 days but couldn't get a fix, Any help ?

  


• Node.js - I keep getting the following error : Error : ffmpeg stream : write EPIPE

  14 août 2020, par Kyky

  I'm currently programming a Discord bot using discord.js, and I'm using ytdl-core to play music. Here is the program I'm using to play music :

  



  const {google} = require('googleapis');
const ytdl = require('ytdl-core');
// Initialise Google API
const youtube = google.youtube({
    version: 'v3',
    auth: MyAuth
});
musicQueue = [] // Queue for playing music
dispatcher = null; // Transmits voice packets from stream

module.exports = {
    name: "play",

    async execute(msg, args) { // msg is a Discord Message
        // Play music and music queued after
        async function playAndQueue(stream) {

            // Join voice channel
            voiceChannel = client.channels.cache.find(channel => channel.type === "voice" && channel.name === "music-channel");
            voiceConnection = voiceChannel.join();

            dispatcher = await voiceConnection.play(stream, {volume: 0.3}); // Decrease volume to prevent clipping

            // When music stops
            dispatcher.on("finish", async reason => {
                if (musicQueue[0]) { // Still have music queued
                    const nextVideoLink = musicQueue[0]; // Next video to play
                    const stream = ytdl(nextVideoLink, {filter: 'audioonly'});

                    playAndQueue(stream);
                    dispatcherInfo = await ytdl.getInfo(nextVideoLink);
                    musicQueue.shift();
                } else { // No music to play
                    dispatcher = null;
                    dispatcherInfo = null;
                }
            });

            dispatcher.on("error", console.log);
            dispatcher.on("debug", console.log);

        }

        // Search Youtube using args
        const youtubeSearchResult = await youtube.search.list({
            part: 'snippet',
            type: 'video', // We do not want channels or playlists
            q: args.join(' '),
            maxResults: 1 // We only need first search result
        });
        const youtubeVideo = youtubeSearchResult.data.items[0];
        if (! youtubeVideo) {
            msg.channel.send("Error: Could not find any music matching search.");
            return;
        }

        const videoLink = `https://www.youtube.com/watch?v=${youtubeVideo.id.videoId}`; // Link to video

        const stream = ytdl(videoLink, {filter: 'audioonly'});
        const videoInfo = await ytdl.getInfo(videoLink);


        if (dispatcher) { // Currently playing music
            musicQueue.push(videoLink);
            msg.channel.send(`**${videoInfo.title}** has been added into the queue!`);
        } else {
            playAndQueue(stream);
            dispatcherInfo = videoInfo;
            msg.channel.send(`Currently playing **${videoInfo.title}**!`);
        }
    }
}


  



  However, when I try to run the program on Heroku, I get this error :

  



  ffmpeg stream: write EPIPE
    at WriteWrap.onWriteComplete [as oncomplete (internal/stream_base_commons.js:92:16) {
  errno: 'EPIPE',
  code: 'EPIPE',
  syscall: 'write'
}


  



  What can I do ?

  


• Efficient way to create variant playlists from mp4 for HLS

  3 mars 2021, par nnaj20

  I am totally new to video encoding and options, and just learned about Apple's HLS requirements.

  


  So far, I've been able to get something working for my iOS app. However, I find the entire process to be very slow and manual. Now, having to repeat this for several more locales (video translations), I can't imagine there isn't a better way.

  


  Controlling bitrate

  


  To have control over the bitrate, I use HandBrake to create a new .mp4 file with the appropriate video encoder setting, for each bitrate I want (192k, 400k, 1m, etc.). THEN, I move onto creating the playlists. This alone takes several minutes—is there a better way ? tsrecompressor seemed close, but it just streams to a local port and doesn't save any playlists.

  


  Creating playlists from MP4

  


  Then I use Apple's suite of command-line tools (mediafilesegmenter, variantplaylistcreator, mediastreamvalidator, hlsreport) to generate the playlists, combine into a master playlist, validate, etc. I suppose this part could be somewhat automated with a script. I've seen others use FFMPEG, but I think the latter 3 Apple tools would still need to be sequentially applied.

  


  Do you see anything that can be obviously optimized ?