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• What ffmpeg arguments will approximate Zoom recording quality [closed]

  25 octobre 2020, par Stan Ivanov

  I've been recording screen sharing presentations using Quicktime on my Mac and it uses x264 format with 60fps. The produced video file is with type MOV and around 2.2GB for 1 hour of presentation. I want to compress it using ffmpeg and I've been doing so using x264 as well. Here are my arguments :

  


  ffmpeg -i '$inputFile' -vcodec "libx264" -crf 32 -vf 'scale=${width}:-2,fps=24' -c:a aac -b:a 128k -preset veryslow -profile:v high -tune stillimage -f mp4 '$outputFile'


  


  I rescale my video to 1600px width to save on space and I also convert the recording to 24fps as I see no need to have the full 60fps available. It's mostly static images as I talk over my screen. This results in about 100MB file using the -profile:v high argument. Otherwise it is around 160MB.

  


  On the other hand Zoom recording for much larger resolutions (4k etc) are around 80MB per 1 hour. Does anyone know what options we can use to approximate this file size and quality ? I know they are using lower quality audio which might explain some of the difference.

  


  But if I increase the -crf 32 argument it starts to degrade quality too much. I am not sure how Zoom achieves it's video quality with high resolutions such as 1080p and 4k with a file size of 80MB while I can't match it using 1600px width.

  


  Edit : I had an idea that I probably don't need all 24 fps in a screen sharing of static content. So I reduced it to 5 fps and that seems to work well for my use case. I wonder if this is what Zoom does ?

  


• What ffmpeg arguments will approximate Zoom recording quality [closed]

  25 octobre 2020, par Stan Ivanov

  I've been recording screen sharing presentations using Quicktime on my Mac and it uses x264 format with 60fps. The produced video file is with type MOV and around 2.2GB for 1 hour of presentation. I want to compress it using ffmpeg and I've been doing so using x264 as well. Here are my arguments :

  


  ffmpeg -i '$inputFile' -vcodec "libx264" -crf 32 -vf 'scale=${width}:-2,fps=24' -c:a aac -b:a 128k -preset veryslow -profile:v high -tune stillimage -f mp4 '$outputFile'


  


  I rescale my video to 1600px width to save on space and I also convert the recording to 24fps as I see no need to have the full 60fps available. It's mostly static images as I talk over my screen. This results in about 100MB file using the -profile:v high argument. Otherwise it is around 160MB.

  


  On the other hand Zoom recording for much larger resolutions (4k etc) are around 80MB per 1 hour. Does anyone know what options we can use to approximate this file size and quality ? I know they are using lower quality audio which might explain some of the difference.

  


  But if I increase the -crf 32 argument it starts to degrade quality too much. I am not sure how Zoom achieves it's video quality with high resolutions such as 1080p and 4k with a file size of 80MB while I can't match it using 1600px width.

  


  Edit : I had an idea that I probably don't need all 24 fps in a screen sharing of static content. So I reduced it to 5 fps and that seems to work well for my use case. I wonder if this is what Zoom does ?

  


• Youtube-dl and Ffmpeg

  25 juin 2022, par Joksy

  i have made a music bot with discord.py, but i get this info thing and it doesnt work anymore error [youtube] QxYdBvB8sOY: Downloading webpage 985104597242773505 [2022-06-25 07:45:51] [INFO    ] discord.player: Preparing to terminate ffmpeg process 37580. [2022-06-25 07:45:51] [INFO    ] discord.player: ffmpeg process 37580 has not terminated. Waiting to terminate... [2022-06-25 07:45:51] [INFO    ] discord.player: ffmpeg process 37580 should have terminated with a return code of 1. this is my code

  


  import discord
import os
import asyncio
import youtube_dl
from discord import *

token = "token is here"
prefix = "j!"
blocked_words = ["blocked words are here"]

voice_clients = {}

yt_dl_opts = {'format': 'bestaudio/best'}
ytdl = youtube_dl.YoutubeDL(yt_dl_opts)

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

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

client = discord.Client(intents=intents)


programmer_role = "987018590152699964"
            


@client.event
async def on_ready():
    print(f"Bot logged in as {client.user}")

@client.event
async def on_message(msg):
    if msg.author != client.user:
        if msg.content.lower().startswith(f"{prefix}info"):
            await msg.channel.send(f"Hi, Im JoksysBot Made By Joksy!")

        for text in blocked_words:
            if text in str(msg.content.lower()):
                await msg.delete()
                await msg.channel.send("Hey, Dont Say That!")
                return
        if msg.content.startswith(f"{prefix}play"):

            try:
                voice_client = await msg.author.voice.channel.connect()
                voice_clients[voice_client.guild.id] = voice_client
            except:
                print("error")

            try:
                url = msg.content.split()[1]

                loop = asyncio.get_event_loop()
                data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=False))

                song = data['url']
                player = discord.FFmpegPCMAudio(song, **ffmpeg_options, executable="C:\\Users\\jonas\\Documents\\ffmpeg-2022-06-16-git-5242ede48d-full_build\\ffmpeg-2022-06-16-git-5242ede48d-full_build\\bin\\ffmpeg.exe")

                voice_clients[msg.guild.id].play(player)

            except Exception as err:
                print(err)

        if msg.content.startswith(f"{prefix}pause"):
            try:
                voice_clients[msg.guild.id].pause()
            except Exception as err:
                print(err)

        if msg.content.startswith(f"{prefix}resume"):
            try:
                voice_clients[msg.guild.id].resume()
            except Exception as err:
                print(err)

        if msg.content.startswith(f"{prefix}stop"):
            try:
                voice_clients[msg.guild.id].stop()
                await voice_clients[msg.guild.id].disconnect()
            except Exception as err:
                print(err)

client.run(token)



  


  its weird since all the other code in my bot works fine like the !info command, so it must be an error with either youtube-dl or ffmpeg. But then again it doesnt join the voice call in the first place so that might be the error. i added ffmpeg to path but i still wrote the path to it here player = discord.FFmpegPCMAudio(song, **ffmpeg_options, executable="C:\\Users\\jonas\\Documents\\ffmpeg-2022-06-16-git-5242ede48d-full_build\\ffmpeg-2022-06-16-git-5242ede48d-full_build\\bin\\ffmpeg.exe"). i followed this tutorial for the bot https://www.youtube.com/watch?v=Q8wxin72h50&t=1040s i did everything he did but it didnt work. My discord.py version is 2.0.0 my Python version is 3.10.5 and my youtube_dl version is 2021.12.17 my ffmpeg download is ffmpeg-2022-06-16-git-5242ede48d-full_build. I tested it on discord.py 1.73 and it worked fine. This was in intellij though whilst my main program is in Visual Studio Code but i couldnt see it making any big difference so it could be the intents that makes the program not work.I couldnt see any mistakes in the code but im new to discord.py, youtube_dl and ffmpeg stuff so unless visual studio code showed me what i did wrong, i wouldnt notice. But what did i do wrong and how can i fix it ?