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• Input FFMPEG subprocess to FFMPEG RTMP stream in python ?

  12 mai 2021, par Guiso

  I managed to stream frames of a video to the RTMP server but I also want to stream the audio - for that I can't use the rawvideo format and now I don't know how many bytes are required for the ffmpeg video to send to the ffmpeg stream.

  


  If there is an easier way to do this I would much prefer it, I tried my best in making comments so that the code is understandable.

  


  WIDTH = 1152
HEIGHT = 720
RTMP = ""
#Returns frame of a video
def read_frame(process1, width, height):
    frame_size = width * height * 3 #<--- I don't know how many bytes should I ask for.
    in_bytes = process1.stdout.read(frame_size)
    if len(in_bytes) == 0:
        return []
    else:
        assert len(in_bytes) == frame_size
        frame = (
            np
            .frombuffer(in_bytes, np.uint8)
            .reshape([height, width, 3])
        )
    return frame


def getVideoOutput(in_filename):
    args = (
        ffmpeg
        .input(in_filename # Path to file
        ,loglevel="quiet"#Don't show ffmpegs logs
        )
        .output('pipe:', format='flv')#Outputs a pipe
        .compile()
    )
    return subprocess.Popen(args, stdout=subprocess.PIPE)

#Start stream
def startStream(width, height):
    args = (
        ffmpeg
        .input('pipe:', #Sats to ffmpeg that the input is a stream
        format='flv'#Format of the video
        ,r="30"#Sets average fps
        ,s='{}x{}'.format(width, height)#Set the width and height of the input
        ,loglevel="quiet" #Don't show ffmpegs logs 
        )
        .output(RTMP,vcodec="libx264",preset="ultrafast",acodec="aac",format="flv")
        .overwrite_output()
        .compile()
    )
    return subprocess.Popen(args, stdin=subprocess.PIPE)

#Writes frame to the stream
def write_frame(process2, frame):
    process2.stdin.write(
        frame
        .astype(np.uint8)
        .tobytes()
    )

#Gets frames from multiple videos
def getBytes():
    for video in os.listdir(".\\Videos"):#Loops through videos in the videos folder 
    #while True:
        #video = os.listdir(".\\Videos")[0]
        videoPath = os.path.join(pathlib.Path().absolute(),"Videos",video)
        pipe = getVideoOutput(videoPath) #Get a stream of bytes from the video
        while True:
            frame = read_frame(pipe,WIDTH,HEIGHT)#Get a frame
            if frame == []:#If the video ends Go to the next one
                break
            yield frame#return the frame


stream = startStream(WIDTH,HEIGHT)#Starts stream to server and outputs a subprocess
FrameGenerator = getBytes()#Start generator

while True:
    write_frame(stream,next(FrameGenerator))#infinite loop writes to the stream a frame


  


• Discord bot stop playing music in random time of song

  25 janvier 2021, par Jusmejtr

  I have a discord to let me play a random song from the list.

  


  How bot works :
Bot IS connected to firestore Cloud (firebase) where i have economy data from my server. Price for playing random song is 75 coins.

  


  Everything worked as it should, but yesterday I used command, the bot started playing and after a while it stopped playing music and also no other commands worked, bot probably get freezed.

  


  I have no errors in the console until after a minute it showed me this error.

  


  https://pastebin.com/ay9gV75T

  


  The bot is hosted on Heroku and I also added this buildpack to ffmpeg in the settings.

  


  https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest

  


  This is my code :

  


  module.exports = {
    name: "buy-music",
    description: "buy a music",

    async execute(message, config, db){
        const PREFIX = (config.prefix);

        if(message.content === PREFIX + "buy music"){
            const ytdl = require("ytdl-core");
            message.delete();
            let uzivatel = message.author.tag;

            let voiceChannel = message.member.voice.channel;
            if(!voiceChannel) return message.reply("Musíš byť vo voice roomke");

            let cena = 75;
    
            db.collection('economy').doc(uzivatel).get().then(async (q) => {
                if(!q.exists) return message.reply("Nemáš vytvorený účet");
                var hodnota = q.data().money;
                if(hodnota < cena) return message.reply("Nemáš dostatok financií");

                db.collection('statusy').doc('music').get().then(async (asaj) => {
                    let stav = asaj.data().stav;
                    if(stav == "off"){
                        db.collection('statusy').doc('music').update({
                            "stav": "on",
                            "autor": message.author.tag,
                        });
                        hodnota -= cena;
                        db.collection('economy').doc(uzivatel).update({
                            'money': hodnota
                        });
                        function randomhraj(){
                            var pole = [
                     My YT links

                            ]
                            let rnd = Math.floor(Math.random() * pole.length);
                            let output = pole[rnd];
                            return output;
                        }
        
                        try{
                            var pripojenie = await voiceChannel.join();
                            message.reply(`Úspešne si si kúpil chuťovečku`);
                        }catch(error){
                            console.log(`Error pri pripajani do room (music join) ${error}`);
                        }
                        
                        const dispatcher = pripojenie.play(ytdl(randomhraj())).on("finish", async() => {
                            await voiceChannel.leave();
                            await db.collection('statusy').doc('music').update({
                                "stav": "off",
                                "autor": "nikto",
                            });
                        }).on("error", error => {
                            console.log(error)
                        })
                        dispatcher.setVolumeLogarithmic(5 / 5)
                    }else{
                        message.reply("Momentálne si hudbu kúpil niekto iný alebo ak si hudbu kúpil a chceš ju zastaviť použi príkaz *stop");
                    }
                    
                });
            });
    
        }else if(message.content === PREFIX + "stop"){
            message.delete();
            db.collection('statusy').doc('music').get().then((n) => {
                let kto = n.data().autor;
                let meno = message.author.tag;
                if(!message.member.voice.channel) return message.channel.send("Musíš byť vo voice roomke pre stopnutie hudby");
                if(kto == meno){
                    message.member.voice.channel.leave();
                    message.channel.send("Úspešne odpojený");
                    db.collection('statusy').doc('music').update({
                        "stav": "off",
                        "autor": "nikto",
                    });
                }else{
                    message.reply("Zastaviť hudbu môže len ten kto si ju kúpil");
                }
            });
        }
        
    }
}


  


• Getting error "WebAssembly.Memory() : could not allocate memory" when running ffmpeg.wasm on android chrome browser

  27 juin 2022, par Ravi Kundu

  Error in detail :

  


  WebAssembly.Memory(): could not allocate memory
at https://*******/ffmpeg-core.js:22:82
at https://*******/ffmpeg.min.js:1:6506
at f (https://*******/ffmpeg.min.js:1:11322)
at Generator._invoke (https://*******/ffmpeg.min.js:1:11110)
at Generator.next (https://*******/ffmpeg.min.js:1:11747)
at i (https://*******/ffmpeg.min.js:1:4295)
at c (https://*******/ffmpeg.min.js:1:4498)


  


  Code for ffmpeg :

  


  const downloadWithFFMPEG = async () =>{
  const sourceBuffer = await fetch(recordingURL).then(r => r.arrayBuffer());
  await ffmpeg.load();
  await ffmpeg.FS(
    "writeFile",
    "input.webm",
    new Uint8Array(sourceBuffer, 0, sourceBuffer.byteLength)
  );
  await ffmpeg.run("-i", "input.webm", "-c", "copy", "output.mp4")
  const output = ffmpeg.FS("readFile", "output.mp4");
  var link = document.createElement('a')
  link.href = URL.createObjectURL(new Blob([output.buffer], { type: 'video/mp4;codecs=H264' }));
  link.download = this.data;
  link.click();
  recording = false;
}


  


  Brief about problem :
The error only comes for android chrome browser. The same code works fine on pc/laptop chrome.
Have also enabled Webassembly-thread on chrome ://flags for android browser as someone suggested me to do it but still same error. Can someone help me ?