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• Is ffmpeg's chromakey filter broken when matching black/white ?

  7 janvier 2023, par Taylor Brown

  I have a file, colors.png. It looks like this :

  



  Let's say I want to make the red square transparent. When I run ffmpeg -i colors.png -filter_complex "[0]chromakey=0xff0000:similarity=0.1:blend=0.0[out]" -map "[out]" colors-rm-red.png (notice I use similarity=0.1 to make this work), I get exactly that :

  



  How about making the blue square transparent ? ffmpeg -i colors.png -filter_complex "[0]chromakey=0x0000ff:similarity=0.1:blend=0.0[out]" -map "[out]" colors-rm-blue.png works too !

  



  But what about replacing black ? ffmpeg -i colors.png -filter_complex "[0]chromakey=0x000000:similarity=0.1:blend=0.0[out]" -map "[out]" colors-rm-black.png gives me this :

  



  And likewise, replacing white with ffmpeg -i colors.png -filter_complex "[0]chromakey=0xffffff:similarity=0.1:blend=0.0[out]" -map "[out]" colors-rm-white.png gives me the same result :

  



  Why is this ? Even if I use similarity=0.01, which according to the docs "matches only the exact key color", this still doesn't work when I'm trying to make black/white transparent. Is ffmpeg broken, or am I misunderstanding the chromakey filter ?

  


• ffmpeg / avconv error while using a discord bot slash cmd

  30 novembre 2022, par Ema R

  Code

  


  const {
    SlashCommandBuilder,
    PermissionFlagsBits,
    PermissionsBitField,
    EmbedBuilder,
  } = require("discord.js");

    const { generateDependencyReport, AudioPlayerStatus, joinVoiceChannel, createAudioPlayer, createAudioResource  } = require('@discordjs/voice'); 
  const googleTTS = require("google-tts-api");

module.exports = {
  data: new SlashCommandBuilder()
    .setName(`tts`)
    .setDescription(`Fai ripetere al bot un messaggio in un canale vocale`)
    .addStringOption((option) =>
        option
          .setName("messaggio")
          .setDescription("Scrivi il messaggio da far ripetere dal bot in vocale")
          .setRequired(true)
      )
    .addBooleanOption((option) =>
    option
      .setName("rallentatore")
      .setDescription("Vuoi che il messaggio sia mandato a rallentatore?")
      .setRequired(true)
  ),  
  async execute(interaction, client) {

    const testo = interaction.options.getString("messaggio");
    const slow = interaction.options.getBoolean("rallentatore");



     const url = googleTTS.getAudioUrl(testo, {
        lang: "it",
        slow: slow,
        host: 'https://translate.google.com',
      });

      


      const { generateDependencyReport, AudioPlayerStatus, joinVoiceChannel, createAudioPlayer, createAudioResource  } = require('@discordjs/voice');



      const voiceChannelId = interaction.member.voice.channel.id
        const voiceChannel = interaction.member.voice.channel
        const guildId = interaction.guild.id

        
        const player = createAudioPlayer();

    

        const resource = createAudioResource(url);
        player.play(resource);

        
        const connection = joinVoiceChannel({
            channelId: voiceChannelId,
            guildId: guildId,
            adapterCreator: voiceChannel.guild.voiceAdapterCreator,
        });    



        const subscription = connection.subscribe(player);


        if (subscription) {
            setTimeout(() => subscription.unsubscribe(), 30_000);
        }

 
    
  },
};



  


  Error

  


  Error: FFmpeg/avconv not found!&#xA;    at Function.getInfo (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\prism-media\src\core\FFmpeg.js:143:11)&#xA;    at Function.create (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\prism-media\src\core\FFmpeg.js:156:38)&#xA;    at new FFmpeg (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\prism-media\src\core\FFmpeg.js:45:27)&#xA;    at Object.transformer (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\@discordjs\voice\dist\index.js:1699:27)&#xA;    at C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\@discordjs\voice\dist\index.js:1855:58&#xA;    at Array.map (<anonymous>)&#xA;    at createAudioResource (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\node_modules\@discordjs\voice\dist\index.js:1855:39)&#xA;    at Object.execute (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\src\commands\tools\tts.js:56:26)&#xA;    at Object.execute (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\src\events\client\interactionCreate.js:13:23)&#xA;    at Client.<anonymous> (C:\Users\Casa\OneDrive\Desktop\Discord\eKicks\eKicks Bot v14\src\functions\handlers\handleEvents.js:20:23)&#xA;</anonymous></anonymous>

  


  i am making a command to play a message in a voice channel. Once this error was returned from the terminal I installed ffmpeg by creating an environment variable and installed python. I don't understand why it keeps giving this error. below I am attaching a picture of the npm list

  


  

  


  maybe I also have to install avconv but I don't know how to do it, could you please attach the link ? do i need to add avconv to the environment variables as well ?

  


• I thought adding double quotes if you have spaces in file or folder directories would work here, but it doesn't ?

  17 novembre 2022, par Newb Coder

  for %%f in ("F:\folder\another subfolder + name that has a space like this and (that also has these round brackets here somewhere) and [these square brackets]\folder 3\file1 [info in square brackets - [more, info in a nested square bracket]].mkv") 
    do ffmpeg -ss 00:18:22.000 -i "%%f" -ss 00:00:0.500 -t 00:03:5.000 -c copy "%%~nf+1.mkv"


  


  This is my batch script, that I um, stole from someone, (coz why reinvent the wheel when the wheel already exists and tested working by someone else, right ?) which has worked on many other single and multiple media files at once that don't have spaces in them or file directories that don't, but as soon as I add one that does like in the above example, the batch script refuses to work.

  


  Google'd a bit and read that you need to add quotes. Well I tried both double and single quotes and they don't work... So why doesn't quotes work in this instance...?