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• When using MoviePy to resize a video how do I know what bitrate to use to maintain quality when writing the new video to disk

  4 juillet 2016, par Michael

  Expanding on this question How To Resize a Video Clip Python about using MoviePy to resize a video.

  When it comes time to write the resized video to disk
  How do I select a bitrate value so there is as little loss of quality as possible ?

  The original video is 4.8M on disk and is .mp4

  Bit rate set when writing to disk

      clip_resized.write_videofile(ResizedClip,bitrate="5000k")

  Gives a file of 8.3MB in size

  No bit rate set

      clip_resized.write_videofile(ResizedClip)

  Gives a file of 3.3MB

• lavc/videotoolboxenc : Speed/Quality prioriry setting

  1er mai 2022, par Simone Karin Lehmann

  lavc/videotoolboxenc : Speed/Quality prioriry setting
  Add options to h264, hevc and prores encoders to prioritize speed.
  
  Speeds up encoding by 50% - 70%
  Signed-off-by : Simone Karin Lehmann <simone@lisanet.de>
  
  Signed-off-by : Rick Kern <kernrj@gmail.com>
  

  • [DH] libavcodec/videotoolboxenc.c

• How to get best audio quality on music bot using discord.py ?

  9 mai 2021, par user28606

  I've built a discord music bot in discord.py but for some reason, it doesn't play music in as high quality as Fredboat or Rythm(so I don't think voice chat's bitrate is the problem). I've tried a couple of things online.

  


  The only thing that improved quality a little bit was downloading the song before playing it. But the quality was still far from anything like Fredboat's. It's also very impractical since downloading a 1h song takes a while and is space consuming.

  


  I'm interested in how to fix this and the explanation for why this is happening.

  


  This is the code we're currently using for the music bot :

  


  from discord import FFmpegPCMAudio
import discord
from apscheduler.schedulers.asyncio import AsyncIOScheduler
from apscheduler.triggers.cron import CronTrigger
from discord.ext import commands, tasks
from youtubesearchpython import VideosSearch

class cmd_music(commands.Cog, name="music_commands"):

    def __init__(self, bot):
        self.bot = bot
        self.music_queue = []
        self.scheduler = AsyncIOScheduler()
        self.scheduler.add_job(self.check_queue, CronTrigger(second="0,5,10,15,20,25,30,35,40,45,50,55"))
        self.scheduler.start()
    
    async def play_raw(self, voice_client):
        if not self.music_queue:
            return

        YDL_OPTIONS = {'format': 'bestaudio', 'noplaylist':'True'}
        FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 'options': '-vn'}
        if not voice_client.is_playing():
            with YoutubeDL(YDL_OPTIONS) as ydl:
                info = ydl.extract_info(self.music_queue.pop(0), download=False)
            URL = info['formats'][0]['url']
            voice_client.play(FFmpegPCMAudio(URL, **FFMPEG_OPTIONS))
            voice_client.is_playing()

    async def check_queue(self):
        if not self.bot.voice_clients: return
        
        client = self.bot.voice_clients[0]
        if not client.is_playing():
            if self.music_queue:
                await self.play_raw(client)
           
        
    @commands.command(brief="join")
    async def join(self, ctx):
        await ctx.author.voice.channel.connect()

    @commands.command(brief="leave")
    async def leave(self, ctx):
        await ctx.voice_client.disconnect()
        self.music_queue = []

    @commands.command(brief="play")
    async def play(self, ctx, *name):
        url = VideosSearch(" ".join(name[:]), 1).result().get("result")[0].get("link")
        self.music_queue.append(url)
        await ctx.send("Now playing: " + url)

    @commands.command(brief="skip")
    async def skip(self, ctx):
        await ctx.send("Skipped current song")
        ctx.voice_client.stop()
        if self.music_queue:
            await self.play_raw(ctx.voice_client)```