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• "Cannot read property 'url' of undefined" even though it's already defined

  28 novembre 2020, par Levi Stancz

  I'm making a Discord music Bot and I'm having trouble with an error saying

  


  TypeError: Cannot read property 'url' of undefined


  


  I tried console logging it and it showed me the url, so I don't understand what is the problem with my code.

  


  Here's my code :

  


  //musicBOT
const Discord = require('discord.js');
const client = new Discord.Client();
const ytdl = require('ytdl-core');
const mcPrefix = '.';

const queue = new Map();

client.on('ready', () => console.log('Music bot ready!'));

client.on('message', async message => {
    if(message.author.bot) return;
    if(!message.content.startsWith(mcPrefix)) return;

    const args = message.content.substring(mcPrefix.length).split(" ");
    const serverQueue = queue.get(message.guild.id);

    if(message.content.startsWith(`${mcPrefix}play`)) {

        const voiceChannel = message.member.voice.channel;
        if(!voiceChannel) return message.channel.send("Hang-szobában kell lenned zenelejátszáshoz.");
        const permissions = voiceChannel.permissionsFor(message.client.user);
        if(!permissions.has('CONNECT')) return message.channel.send("Nincs jogosultságom csatlakozni a hangszobához.");
        if(!permissions.has('SPEAK')) return message.channel.send("Nincs jogosultságom megszólalni ebben a hangszobában.");

        const songInfo = await ytdl.getInfo(args[1])
        const song = {
            title: songInfo.title,
            url: songInfo.videoDetails.video_url
        }

        if(!serverQueue) {
            const queueConstruct = {
                textChannel: message.channel,
                voiceChannel: voiceChannel,
                connection: null,
                songs: [],
                volume: 5,
                playing: true
            }
            queue.set(message.guild.id, queueConstruct)

            queueConstruct.songs.push(song)

            try{
                var connection = await voiceChannel.join();
                message.channel.send(`${song.title} lejátszása.`)
                queueConstruct.connection = connection
                play(message.guild, queueConstruct.songs[0])
            }catch(e){
                console.log(`Hiba csatlakozás közben itt: ${e}`);
                queue.delete(message.guild.id)
                return message.channel.send(`Hiba volt a csatlakozás közben itt: ${e}`)
            }
        } else{
            serverQueue.songs.push(song)
            return message.channel.send(`**${song.title}** hozzáadva a lejátszási listához.`)
        }
        return undefined
        

        
    }else if (message.content.startsWith(`${mcPrefix}stop`)) {
        if(!message.member.voice.channel) return message.channel.send("Hang-szobában kell lenned ahhoz, hogy leállítsd a zenét.")
        if(!serverQueue) return message.channel.send("There is nothing playing")
        serverQueue.songs= []
        serverQueue.connection.dispatcher.end()
        message.channel.send("Sikeresen megálltottad a zenét.")
        return undefined
    }else if(message.content.startsWith(`${mcPrefix}skip`)){
        if(!message.member.voice.channel) return message.channel.send("Hang-szobában kell lenned a skip parancshoz.")
        if(!serverQueue) return message.channel.send("There is nothing playing")
        serverQueue.connection.dispatcher.end()
        message.channel.send("Zene továbbléptetve.")
        message.channel.send(`${song.title} játszása.`)
        
        return undefined
    }

    function play(guild, song) {
        const serverQueue = queue.get(guild.id)
    
        if(!serverQueue.songs){
            serverQueue.voiceChannel.leave()
            queue.delete(guild.id)
            return
        }
    
        const dispatcher = serverQueue.connection.play(ytdl(song.url))
            .on('finish', () => {
                serverQueue.songs.shift()
                play(guild, serverQueue.songs[0])
            })
            .on('error', error => {
                console.log(error)
            })
            dispatcher.setVolumeLogarithmic(serverQueue.volume / 5)
    }

})
//musicBOT


  


  and here is the full error :

  


  const dispatcher = serverQueue.connection.play(ytdl(songInfo.url))&#xA;                                                                     ^&#xA;TypeError: Cannot read property &#x27;url&#x27; of undefined&#xA;    at play (C:\Users\Levi\Desktop\Discord BOT Javascript\bot.js:97:70)&#xA;    at StreamDispatcher.<anonymous> (C:\Users\Levi\Desktop\Discord BOT Javascript\bot.js:100:17)&#xA;    at StreamDispatcher.emit (node:events:388:22)&#xA;    at finish (node:internal/streams/writable:734:10)&#xA;    at processTicksAndRejections (node:internal/process/task_queues:80:21)&#xA;</anonymous>

  


  I started searching on the internet but found nothing about it, I guess my basic javascript knowledge is just not enough.

  


• ffmpeg hangs when muxing longer videos

  11 août 2020, par 492357816

  I am using ffmpeg with Janus WebRTC server for muxing video conference recordings. For video conferences under approximaately 5 minutes duration, existing code works well. If the source files are longer than that the process appears to hang without returning either an error or a completed file.
Any advice/suggestions would be most welcome.

  


      var recordingsPath = exports.recordingsPath;
    var videoRecordingPath = `${recordingsPath}/${filename}-video.mjr`;
    var audioRecordingPath = `${recordingsPath}/${filename}-audio.mjr`;
    var videoOutputPath = `${recordingsPath}/${filename}-output1.mp4`;
    var audioOutputPath = `${recordingsPath}/${filename}-output1.wav`;
    var finalOutputPath = `${recordingsPath}/${filename}-final.mp4`;
    var rawConverterPath = "/opt/janus/bin/janus-pp-rec";
    var audioRecordingByteSize = exports.getFileSizeInBytes(audioRecordingPath);
    var audioIsValid = audioRecordingByteSize > 8;

    if (audioIsValid) {
        //turn audio and video mjr files into .wav and mp4 respectively
        exports.runBashSync([ rawConverterPath, videoRecordingPath, videoOutputPath]);
        exports.runBashSync([ rawConverterPath, audioRecordingPath, audioOutputPath]);
        return exports.mergeMp4AndWav(
            audioOutputPath, videoOutputPath, finalOutputPath
        ).then(function(result) {
            // remove source data for audio & video
            exports.runBashSync([ "rm", audioOutputPath]);
            exports.runBashSync([ "rm", videoOutputPath]);
            exports.runBashSync([ "rm", audioRecordingPath]);
            exports.runBashSync([ "rm", videoRecordingPath]);
        });
    } else {
        // handle cases where audio is not available
        feedback("no audio");
        return new Promise(function(resolve) {
            exports.runBashSync([ rawConverterPath, videoRecordingPath, finalOutputPath], true);
            if (Number.isInteger(audioRecordingByteSize)) {
                exports.runBashSync([ "rm", audioRecordingPath]);
            }
            exports.runBashSync([ "rm", videoRecordingPath]);
            resolve(true);
        });
    }
};

exports.joinMp4s = function(mp4Filenames, outputPath) {
    feedback("joining mp4s");
    if (mp4Filenames.length === 1) {
        feedback("single-stream case");
        exports.runBashSync(["mv", mp4Filenames[0], outputPath]);
        return new Promise(function(resolve) { resolve(true); });
    }
    feedback("multi-stream case");
    var joinCmd = ["ffmpeg"];
    mp4Filenames.forEach(function(filename) {
        joinCmd.push(`-i ${filename}`);
    });
    joinCmd.push("-strict -2");
    var totalHeight = 960;
    var totalWidth = 1280;

    joinCmd.push(`-filter_complex "color=size=${totalWidth}x${totalHeight}:c=Black [base];`);

    // var numStrms = mp4Filenames.length;
    var streamsPattern = exports.setStreamsPattern(mp4Filenames);
    var strmHeight = streamsPattern.height;
    var strmWidth = streamsPattern.width;
    var strmDmns = `${strmWidth}x${strmHeight}`;
    feedback("streamDimensions: " + strmDmns);

    var i;
    for (i = 0; i < mp4Filenames.length; i++) {
        joinCmd.push(`[${i}:v] setpts=PTS-STARTPTS, scale=${strmDmns} [temp${i}];`);
    }
    for (i = 0; i < mp4Filenames.length; i++) {
        var xCoord;
        var yCoord;
        if (i === 0) {
            xCoord = streamsPattern.coords[i].xCoord;
            yCoord = streamsPattern.coords[i].yCoord;
            joinCmd.push(`[base][temp${i}] overlay=shortest=1:x=${xCoord}:y=${yCoord} [tmp${i + 1}];`);
            // joinCmd.push(`[base][temp${i}] overlay=shortest=1 [tmp${i + 1}];`);
        } else {
            var cmd = `[tmp${i}][temp${i}] overlay=shortest=1`;
            xCoord = streamsPattern.coords[i].xCoord;
            yCoord = streamsPattern.coords[i].yCoord;

            if (xCoord) { cmd += ":x=" + xCoord; }
            if (yCoord) { cmd += ":y=" + yCoord; }

            if (i + 1 !== mp4Filenames.length) { cmd += ` [tmp${i + 1}];`; }
            joinCmd.push(cmd);
        }
    }

    joinCmd.push(`" ${outputPath}`);
    feedback("join command: " + joinCmd);
    return exports.runBashAsync(joinCmd).then(function(result) {

        mp4Filenames.forEach(function(filename) {
            feedback("removing: " + filename);
            exports.runBashSync(`rm ${filename}`);
        });
    });
};



  


• (Folderwide) Bulk conversion in ffmpeg to a H264 codec

  5 mars 2021, par Habboman

  So I was trying to get a hang of ffmpeg but I am not very good at it. I am trying to get all .mkv files converted to .m4v with a H264 codec. From another project I know that the h264_cuvid decoder worked perfectly well for my needs. I also checked via ffmpeg -decoders that I wrote it correctly. So the windows-batchfile (I frankenstein-ed together from other forums) looks like this :

  


  for %%a in ("*.mkv") do ffmpeg -i "%%a" -c:v h264_cuvid -preset fast -crf 20 -b:v 128k "newfiles\%%~na.m4v"
pause


  


  What I get is sadly only :

  


  


  unknown encoder 'h264_cuvid'

  


  


  How do I solve this ?

  


  If it is easier to start from scratch following is what I am trying to achieve

  


  I am pretty new to this whole conversion/coding thing. I got a raspberry pi as a homeserver for my video files. Sadly it can only direct stream correctly encoded files (H.264), otherwise the Pi is trying to encode the videos itself (what causes buffering). So I am trying to find a solution to throw my whole library into a folder and convert it to a usable format.