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• Green artifact in WebM video

  29 août 2022, par AMDIvailo

  I'm recording a canvas with the MediaRecorder web api. The resulting WebM video looks good in most players (has artifacts in some), but if I convert it to mp4 with ffmpeg -i out.webm out.mp4, some strange green artifacts appear on the bottom of it (in every player). Anyone knows why this happens ?

  


  The WebM video : https://drive.google.com/file/d/1RQb_610nIN_s974ZRoquApr5ZUWzYJKk/view?usp=drivesdk

  


  The corrupted MP4 output :
https://drive.google.com/file/d/1RVWSOBwpo0FKTGKPmkbBcHdkXtbHbLVc/view?usp=drivesdk

  


  Thank you in advance

  


• Merge video clip

  18 septembre 2013, par Priyal

  I am trying concat two video clips of different bitrate like :

  ffmpeg -i 1.mp4 -sameq 1.mpg
  
  ffmpeg -i 2.mp4 -sameq 2.mpg
  
  cat 1.mpg 2.mpg | ffmpeg -f mpeg -i - -sameq -vcodec mpeg4 output.mp4

  But when I run output.mp4, audio is not properly synchronised.

  Audio gets either muted or overlapped.

  I also tried using mp4box with ffmpeg :

  ffmpeg -i D:\n.mp4 -c:v libx264 -vf scale=426:238 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts D:\1.ts
  
  
  
  ffmpeg -i D:\new.mp4 -c:v libx264 -vf scale=426:238 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts D:\2.ts
  
  
  
  mp4box -cat D:\1.mp4 -cat D:\2.mp4 D:\13.mp4

  But faced similar issue.

  I also tried tsMuxer to join video clip but audio and video was not synchronised. There was delay between them.

  Please suggest the solution (can be other than ffmpeg) to join video of different bitrate and resolution.

  Thanks in advance

• I need my music bot to play on multiple servers at the same time

  12 mars 2024, par Ondosh

  I'm writing my music bot in Python and I want it to be able to play music on multiple servers at once. Now the attempt to play on several servers looks like this : I start music on the first server, go to the second and start other music there, but the one that was requested on the first one is playing.
Know my code is :

  


  from nextcord.ext import commands
import nextcord, random
import yt_dlp
import datetime
import lazy_queue as lq

FFMPEG_OPTIONS = {
    "before_options": "-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5",
    'options': '-vn'}

YDL_OPTIONS = {
    'format': 'bestaudio/best',
    'extractaudio': True,
    'noplaylist': True,
    'keepvideo': False,
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '320'
    }]
}

bot.remove_command("help")
songs_queue = lq.Queue()
loop_flag = False

@bot.command()
async def add(ctx, *url):
    url = ' '.join(url)
    with yt_dlp.YoutubeDL(YDL_OPTIONS) as ydl:
        try:
            info = ydl.extract_info(url, download=False)
        except:
            info = ydl.extract_info(f"ytsearch:{url}",
                                    download=False)['entries'][0]
    URL = info['url']
    name = info['title']
    time = str(datetime.timedelta(seconds=info['duration']))
    songs_queue.q_add([name, time, URL])
    embed = nextcord.Embed(description=f'Записываю [{name}]({url}) в очередь 📝',
                           colour=nextcord.Colour.red())
    await ctx.message.reply(embed=embed)


def step_and_remove(voice_client):
    if loop_flag:
        songs_queue.q_add(songs_queue.get_value()[0])
    songs_queue.q_remove()
    audio_player_task(voice_client)


def audio_player_task(voice_client):
    if not voice_client.is_playing() and songs_queue.get_value():
        voice_client.play(nextcord.FFmpegPCMAudio(
            executable="ffmpeg\\bin\\ffmpeg.exe",
            source=songs_queue.get_value()[0][2],
            **FFMPEG_OPTIONS),
            after=lambda e: step_and_remove(voice_client))


@bot.command()
async def play(ctx, *url):
    await join(ctx)
    await add(ctx, ' '.join(url))
    await ctx.message.add_reaction(emoji='🎸')
    voice_client = ctx.guild.voice_client
    audio_player_task(voice_client)
async def queue(ctx):
    if len(songs_queue.get_value()) > 0:
        only_names_and_time_queue = []
        for i in songs_queue.get_value():
            name = i[0]
            if len(i[0]) > 30:
                name = i[0][:30] + '...'
            only_names_and_time_queue.append(f'📀 `{name:<33}   {i[1]:>20}`\n')
        c = 0
        queue_of_queues = []
        while c < len(only_names_and_time_queue):
            queue_of_queues.append(only_names_and_time_queue[c:c + 10])
            c += 10
        embed = nextcord.Embed(title=f'ОЧЕРЕДЬ [LOOP: {loop_flag}]',
                               description=''.join(queue_of_queues[0]),
                               colour=nextcord.Colour.red())
        await ctx.send(embed=embed)
        for i in range(1, len(queue_of_queues)):
            embed = nextcord.Embed(description=''.join(queue_of_queues[i]),
                                   colour=nextcord.Colour.red())
            await ctx.send(embed=embed)
    else:
        await ctx.send('Очередь пуста')


  


  As far as I understand, I need to create variables that will be associated with the server ID, but I do not know how to do this.