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• How to create a queue system with a discord.py bot

  20 août 2024, par Zamv

  I'm trying to create a bot with discord.py.

  


  Also, I'm a beginner, so I'll be interested in what I can improve and any errors there are.

  


  I've been stuck on trying to create this queue system for songs, the bot was working perfectly fine and played some urls before I implemented the play_next function. Now it doesn't even play the first song, even if it sends confirmation messages both in the terminal that in the discord channel. I know that the code might be a little confusing.

  


  I wrote two main functions : "play_next" to play the next song in the queue and "play", the main command. Here is my play_next function :

  


  async def play_next(self,ctx):
        if not ctx.voice_client.is_playing: #(don't know if this is correct as I also check if the bot isn't                     playing anything in the play function)
            
            if self.song.queue: 
                next_song = self.song_queue.pop(0) #deleting the first element of the queue, so if we have (song_0, song_1 and song_2) the bot should delete (song_0) making in fact song_1 the "next" song_0
                try:
                    ctx.voice_client.play(discord.FFmpegPCMAudio(next_song), 
                                          after=lambda e: self.bot.loop.create_task(self.play_next(ctx))) #Not gonna lie here, i asked chat gpt for this line, it should make the bot automatically play the next song one after another, correct me if I am wrong

#this is not important
                    embed = discord.Embed(
                        title="Song",
                        description=f"Now playing {next_song}",
                        color = 0x1DB954
                    )
                    await ctx.send(embed=embed)
                except Exception as e:
                    print(f"Error playing the next song: {e}")

            else:
                await ctx.voice_client.disconnect()  # disconnecting from the voice channel if the queue is empty
                print("Disconnected from the voice channel as the queue is empty.")


  


  I think that the main problem of my bot is the play_next function, but here it is my "play" function :

  


      @commands.command(pass_context=True)
    async def play(self, ctx, url: str):  
        if ctx.author.voice:  # first checking if the user is in a voice channel
            if not ctx.voice_client: #then checking if the bot is already connected to a voice channel
                channel = ctx.message.author.voice.channel 
                try:
                    await channel.connect()  #then joining
                    print("I joined the voice channel!")
                except Exception as e:
                    print(f"Failed to connect to the voice channel: {e}")
                    return

            song_path = f"song_{self.song_index}.mp3" #note, im using cogs, i declared self.song_index with the value of 0 
            self.song_index += 1 #i thought that this was the easiest way of creating a new file for each song

            ydl_opts = {
                'format': 'bestaudio/best',
                'postprocesors': [{
                    'key': 'FFmpegExtractAudio',
                    'preferredcodec': 'mp3',
                    'preferredquality': '192',
                }],
                'outtmpl': song_path
            }
            try:
                with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                    print("Starting download...")
                    ydl.download([url]) #this is where it should download the song provided by the url
                    print("Download finished.")
            except Exception as e:
                await ctx.send(f"Failed to download the song: {e}")
                return

#i think that the next two if statements are the main threats
            if os.path.exists(song_path): #if there is atleast 1 song in the queue
                self.song_queue.append(song_path) #append the next one
                embed = discord.Embed(
                    title="Added to Queue!",
                    description = f"{url} has been added to the queue.",
                    color=0x33ff33
                )
                await ctx.send(embed=embed)


                if not ctx.voice_client.is_playing(): #checking if the bot is already playing something, don't know if i should put this if statement here
                    print("Starting playback...")
                    await self.play_next(ctx) #if nothing is playing, then the bot should play the next song



            else:
                await ctx.send("Failed to download or find the audio file.")

        else:
            embed = discord.Embed(
                title="❌You must be in a voice channel",
                color=0xff6666
            )
            await ctx.send(embed=embed)


  


• Create a channel system using FFMPEG and FFserver

  27 mars 2014, par Dnaso

  I have been looking all over the internet but cannot find the answer, am I able to create a channeling system with FFMPEG and ffserver ? what I want to do is give users the ability to dynamically add their ip address and start restreaming their cameras (from a predefined list). Would I have to open different instances or can I dynamically add feeds to ffserver, or is this not a viable option ?

  Any help is appreciated,
  Thank you.

• Running pulseaudio inside docker container to record system audio

  20 mars 2023, par XXLuigiMario

  I'm trying to set up a Docker container with Selenium that takes a recording of the browser with system audio using ffmpeg. I've got video working using Xvfb. Unfortunately, on the audio side, it seems to be more tricky.

  


  I thought I would set up a virtual pulseaudio sink inside the container, which would allow me to record its monitor :

  


  pacmd load-module module-null-sink sink_name=loopback
pacmd set-default-sink loopback
ffmpeg -f pulse -i loopback.monitor test.wav


  


  This works on my host operating system, but when trying to start the pulseaudio daemon in a container, it fails with the following message :

  


  E: [pulseaudio] module-console-kit.c: Unable to contact D-Bus system bus: org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory


  


  This would seem to be related to a freedesktop service called dbus. I've tried installing it and starting its daemon, but I couldn't seem to get it to work properly.
I couldn't find much information on how to proceed from here. What am I missing for pulseaudio ? Perhaps there's an easier way to record the system audio inside a container ?

  


  My goal is not to record it from the host operating system, but to play the audio inside the browser and record it all inside the same container.