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• ffmpeg : overlay video on top of a cropped video, map the overlay audio, cut the base video to the overlays length

  14 mars 2023, par roku

  I'm trying to overlay a video on top of a base video which is cropped to a shorts video format (standing phone). The overlayed video should be centered on top of the base layer. The base video's length should be reduced to the overlay's length. And I want to save only the overlay's audio.

  


  I've tried a bunch of stuff without much success. The current state of my ffmpeg command is this :

  


  ffmpeg -i overlay.mp4 -ss 00:00:00 -to <insert base="base"> -i base.mp4 -map 1:v:0 -map 1:a -vf "crop=ih*(9/16):ih" -crf 21 output.mp4&#xA;</insert>

  


  But this only gives me the cropped version of the base video. So my questions are :

  


  

  1. How can I figure out the base video's length ?

  


  2. How can I actually overlay (not map) other video on top of the base video ?

  


  3. How can I map the overlay's audio ? Since -map 1:a the base's audio and -map 0:a says : "Stream map '0:a' matches no streams. To ignore this, add a trailing ' ?' to the map."

  


  


  Any help is appreciated.

  


• Discord.py - IndexError : list index out of range

  23 novembre 2020, par itsnexn

  Hello i start to learn python and i make bot for practie but i got this error

  


  Ignoring exception in command play:
Traceback (most recent call last):
  File "C:\Users\sinad\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "d:\Projects\discord\musicbot.py", line 147, in play
    player = await YTDLSource.from_url(queue[0], loop=client.loop)
IndexError: list index out of range


  


  and i use ffmpeg to convert audio
and i write this bot in youtube and discord.py documentation
itswork well without music commend but if i use that i got error and isnt working idk why ...
this is my first python project so this is happening and its normal
and this is my code :

  


  import discord
from discord.ext import commands, tasks
from discord.voice_client import VoiceClient

import youtube_dl

from random import choice

from youtube_dl.utils import lowercase_escape

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)


client = commands.Bot(command_prefix='.')

status = ['']
queue = []

#print on terminal when is bot ready
@client.event
async def on_ready():
    change_status.start()
    print('Bot is online!')

#Welcome message
@client.event
async def on_member_join(member):
    channel = discord.utils.get(member.guild.channels, name='general')
    await channel.send(f'Welcome {member.mention}!  Ready to jam out? See `.help` command for details!')

#ping
@client.command(name='ping', help='This command returns the latency')
async def ping(ctx):
    await ctx.send(f'**Ping!** Latency: {round(client.latency * 1000)}ms')

@client.event
async def on_message(message):

    if message.content in ['hello', 'Hello']:
        await message.channel.send("**wasaaaaaap**")

    await client.process_commands(message)


#join
@client.command(name='join', help='This command makes the bot join the voice channel')
async def join(ctx):
    if not ctx.message.author.voice:
        await ctx.send("You are not connected to a voice channel")
        return

    else:
        channel = ctx.message.author.voice.channel

    await channel.connect()

#queue
@client.command(name='queue', help='This command adds a song to the queue')
async def queue_(ctx, url):
    global queue

    queue.append(url)
    await ctx.send(f'`{url}` added to queue!')

#remove
@client.command(name='remove', help='This command removes an item from the list')
async def remove(ctx, number):
    global queue

    try:
        del(queue[int(number)])
        await ctx.send(f'Your queue is now `{queue}!`')

    except:
        await ctx.send('Your queue is either **empty** or the index is **out of range**')

#play
@client.command(name='play', help='This command plays songs')
async def play(ctx):
    global queue

    server = ctx.message.guild
    voice_channel = server.voice_client

    async with ctx.typing():
        player = await YTDLSource.from_url(queue[0], loop=client.loop)
        voice_channel.play(player, after=lambda e: print('Player error: %s' % e) if e else None)

    await ctx.send('**Now playing:** {}'.format(player.title))
    del(queue[0])

#pause
@client.command(name='pause', help='This command pauses the song')
async def pause(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.pause()

#resune
@client.command(name='resume', help='This command resumes the song!')
async def resume(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.resume()

#viow
@client.command(name='view', help='This command shows the queue')
async def view(ctx):
    await ctx.send(f'Your queue is now `{queue}!`')

#leave
@client.command(name='leave', help='This command stops makes the bot leave the voice channel')
async def leave(ctx):
    voice_client = ctx.message.guild.voice_client
    await voice_client.disconnect()

#stop
@client.command(name='stop', help='This command stops the song!')
async def stop(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.stop()

@tasks.loop(seconds=20)
async def change_status():
    await client.change_presence(activity=discord.Game(choice(status)))

client.run("my_secret")


  


• FFmpeg combine Stream Loop and Filter into one command

  5 juin 2022, par Ace

  I'm currently running two FFmpeg commends :

  


  [1] Looping a video for the entire duration of an audio file.

  


  ffmpeg  -stream_loop -1 -i 1min-loop.mp4 -i 2min-song.mp3 -shortest -map 0:v:0 -map 1:a:0 -y looped-video.mp4


  


  [2] Taking the resulting file add overlaying image files.

  


  ffmpeg -i looped-video.mp4 -i overlay.png -i art.jpeg -filter_complex "\
  [2:v]scale=400:400[resized-artwork];\
  [0][resized-artwork]overlay=100:100[vid-and-artwork];\
  [vid-and-artwork][1:v]overlay=0:0" final-video.mp4


  


  Is it possible to combine these into one command ? Thx