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• overlay audio volume histogram over static image

  10 décembre 2018, par Simone Sole

  I’m actually working to a project for music video generation using ffmpeg.
  I’d like to know if it’s possibile to use ffmpeg itself or a combination of command line component under windows environment to make a visualization of audio spectrum (ahistogram ?) over a static background image like the one I found on the web :

  

  Any ideas or coding tips ?

• Discord.py repository example : bot can join voice channel, shows voice activity (green ring), but no sound is produced ?

  19 juin 2023, par Jared Robertson

  I copied an example from the discord.py repository to test out a bot with music capabilities. Though the code enables YouTube playback, I am only concerned with local audio playback. See code here : https://github.com/Rapptz/discord.py/blob/v2.3.0/examples/basic_voice.py. I tested this code as is with only the Discord token portion updated (from constants.py). See code below :

  


  # This example requires the 'message_content' privileged intent to function.

#my constants.py with API keys, tokens, etc. stored
import constants

import asyncio

import discord
import youtube_dl

from discord.ext import commands

# Suppress noise about console usage from errors
youtube_dl.utils.bug_reports_message = lambda: ''


ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': False,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0',  # bind to ipv4 since ipv6 addresses cause issues sometimes
}

ffmpeg_options = {
    'options': '-vn',
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)


class YTDLSource(discord.PCMVolumeTransformer):
    def __init__(self, source, *, data, volume=0.5):
        super().__init__(source, volume)

        self.data = data

        self.title = data.get('title')
        self.url = data.get('url')

    @classmethod
    async def from_url(cls, url, *, loop=None, stream=False):
        loop = loop or asyncio.get_event_loop()
        data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))

        if 'entries' in data:
            # take first item from a playlist
            data = data['entries'][0]

        filename = data['url'] if stream else ytdl.prepare_filename(data)
        return cls(discord.FFmpegPCMAudio(filename, **ffmpeg_options), data=data)


class Music(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

    @commands.command()
    async def join(self, ctx, *, channel: discord.VoiceChannel):
        """Joins a voice channel"""

        if ctx.voice_client is not None:
            return await ctx.voice_client.move_to(channel)

        await channel.connect()

    @commands.command()
    async def play(self, ctx, *, query):
        """Plays a file from the local filesystem"""

        source = discord.PCMVolumeTransformer(discord.FFmpegPCMAudio(query))
        ctx.voice_client.play(source, after=lambda e: print(f'Player error: {e}') if e else None)

        await ctx.send(f'Now playing: {query}')

    @commands.command()
    async def yt(self, ctx, *, url):
        """Plays from a url (almost anything youtube_dl supports)"""

        async with ctx.typing():
            player = await YTDLSource.from_url(url, loop=self.bot.loop)
            ctx.voice_client.play(player, after=lambda e: print(f'Player error: {e}') if e else None)

        await ctx.send(f'Now playing: {player.title}')

    @commands.command()
    async def stream(self, ctx, *, url):
        """Streams from a url (same as yt, but doesn't predownload)"""

        async with ctx.typing():
            player = await YTDLSource.from_url(url, loop=self.bot.loop, stream=True)
            ctx.voice_client.play(player, after=lambda e: print(f'Player error: {e}') if e else None)

        await ctx.send(f'Now playing: {player.title}')

    @commands.command()
    async def volume(self, ctx, volume: int):
        """Changes the player's volume"""

        if ctx.voice_client is None:
            return await ctx.send("Not connected to a voice channel.")

        ctx.voice_client.source.volume = volume / 100
        await ctx.send(f"Changed volume to {volume}%")

    @commands.command()
    async def stop(self, ctx):
        """Stops and disconnects the bot from voice"""

        await ctx.voice_client.disconnect()

    @play.before_invoke
    @yt.before_invoke
    @stream.before_invoke
    async def ensure_voice(self, ctx):
        if ctx.voice_client is None:
            if ctx.author.voice:
                await ctx.author.voice.channel.connect()
            else:
                await ctx.send("You are not connected to a voice channel.")
                raise commands.CommandError("Author not connected to a voice channel.")
        elif ctx.voice_client.is_playing():
            ctx.voice_client.stop()


intents = discord.Intents.default()
intents.message_content = True

bot = commands.Bot(
    command_prefix=commands.when_mentioned_or("!"),
    description='Relatively simple music bot example',
    intents=intents,
)


@bot.event
async def on_ready():
    print(f'Logged in as {bot.user} (ID: {bot.user.id})')
    print('------')


async def main():
    async with bot:
        await bot.add_cog(Music(bot))
        #referenced my discord token in constants.py
        await bot.start(constants.discord_token)


asyncio.run(main())


  


  This code should cause the Discord bot to join the voice channel and play a local audio file when the message " !play query" is entered into the Discord text channel, with query in my case being "test.mp3." When " !play test.mp3" is entered, the bot does join the voice channel and appears to generate voice activity, however no sound is heard. No errors are thrown in the output. The bot simply continues on silently.

  


  Here's what I've checked and tried :

  


  


  1. I am in the Discord voice channel. The code will alert that user is not in the voice channel if a user attempts to summon the bot without being in a voice channel.

     


  


  2. FFmpeg is installed and added to PATH. I even stored a copy of the .exe in the project folder.

     


  


  3. I've tried specifying the full path of both FFmpeg (adding the "executable=" arg to the play function) and the audio file (stored at C :/test.mp3 and a copy in the project folder).

     


  


  4. All libraries up to date.

     


  


  5. Reviewed discord.py docs (https://discordpy.readthedocs.io/en/stable/api.html#voice-related) and played around with opuslib (docs say not necessary on Windows, which I'm on) and FFmpegOpusAudio, but results were the same.

     


  


  6. Referenced numerous StackOverflow threads, including every one suggested when I typed the title of this post. Tried each suggestion individually and in various combinations when possible. See a few below :
Discord.py music_cog, bot joins channel but plays no sound
Discord.py Music Bot doesn’t play music
Discord.py Bot Not Playing music

     


  


  7. Double checked my sound is on and volume turned up. My sound is working I can hear the Discord notification when the bot joins the voice channel.

     


  


  8. Issue is the same if I try to play a YouTube file with !yt command. Bot joins channel fine but no sound is produced.

     


  


  


  That's everything I can think of at the moment. There seem to be many posts regarding this exact topic and also variations of it. I've been unable to find a clear and consistent answer, nor one the works for me. I am willing to try anything at this point as it is obviously possible, but for whatever reason success eludes me. Thank you in advance for any assistance you are willing to offer.

  


• Discord.py bot randomly disconnects and reconnects while playing audio and being hosted on google cloud VM

  15 avril 2021, par Radush

  I recently made a music bot in Python and I've hosted it from my computer for a while for testing.

  


  When I run it on my computer it works flawlessly, however, when I run it from Google Cloud Compute Engine, I get random hiccups in which the bot leaves and rejoins the voice channel for a brief second every few minutes while playing audio. Sometimes it stops playing the audio entirely and sometimes it does its job like normal.

  


  I tried upgrading the CPU and RAM of the VM. Current specs :

  


  Machine type :
e2-standard-4 (4 vCPUs, 16 GB memory)

  


  I'm running the script within "screen" so I don't have to interact with the VM in any way, so this may be an issue.