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• Best way to encode a jpg/png file ? [on hold]

  29 juin 2013, par Shirohige

  Assuming that I use a command like this :
  ffmpeg -i song.mp3 -loop 1 -i cover.jpg -r 1 -t 180 -acodec copy output.mp4

  I used an audio file with variable bitrate and everything took about 5 minutes for ffmpeg to encode it while with Camtasia Studio 8 it took 1 minute. In Camtasia I specified the following settings (using the mp4 container) : http://img197.imageshack.us/img197/1222/psrs.png
  and since Camtasia doesn't allow to put the audio directly into the container Camtasia converted the audio into an constant bitrate mp3. All together it took 1 minute for the encoding job (audio and video encoding) to be done but the result was a 3 times larger file (compared to the ffmpeg encode) with a visible quality deformation of the picture (again compared to the ffmpeg encode).

  I would like to know (since I just use one picture throughout the whole video), is there a way to encode it faster with ffmpeg (sacrificing a bit of the quality of the picture) ? I want to upload my videos to Youtube and as far as I know, Google's servers will encode every video anyway and that's why I don't encode the audio file but just put it into the mp4 container.

  EDIT :

  I am sorry, I will delete it when I am allowed to do so (it says after 2 days).

  EDIT 2 :

  ffmpeg log file : https://dl.dropboxusercontent.com/u/63836714/ffmpeg-20130628-234613.log

• After a while of being idle, my bot, hosted on CentOS 7, can no longer find ffmpeg and requires a restart

  14 août 2019, par Liam McMillen-Meyers

  So I have a discord bot running with discord.js on a CentOS 7 machine. After a while (I’m not exactly sure how long) it will start throwing errors when I try to play a song, saying it can’t find ffmpeg, except that ffmpeg is installed. After I quickly restart the bot it works fine again.

  I genuinely have no idea what causes this, I have a little experience with CentOS but I’m by no means an experienced user, is it something I did when it installed ? I have tried searching for answers online but I can’t find anything

  Error : FFMPEG not found
  at Function.selectFfmpegCommand (/user/DiscordBot/folder1/node_modules/prism-media/src/transcoders/ffmpeg/Ffmpeg.js:46:13)
  at new FfmpegTranscoder (/user/DiscordBot/folder1/node_modules/prism-media/src/transcoders/ffmpeg/Ffmpeg.js:7:37)
  at new MediaTranscoder (/user/DiscordBot/folder1/node_modules/prism-media/src/transcoders/MediaTranscoder.js:10:19)
  at new Prism (/user/DiscordBot/folder1/node_modules/prism-media/src/Prism.js:5:23)
  at new VoiceConnection (/user/DiscordBot/folder1/node_modules/discord.js/src/client/voice/VoiceConnection.js:46:18)
  at Promise (/user/DiscordBot/folder1/node_modules/discord.js/src/client/voice/ClientVoiceManager.js:63:22)
  at new Promise ()
  at ClientVoiceManager.joinChannel (/user/DiscordBot/folder1/node_modules/discord.js/src/client/voice/ClientVoiceManager.js:45:12)
  at VoiceChannel.join (/user/DiscordBot/folder1/node_modules/discord.js/src/structures/VoiceChannel.js:130:30)
  at execute (/user/DiscordBot/folder1/bot.js:467:40)

• Using ffmpeg to get a passthrough stream and create an audio resource for discordjs/voice ?

  5 novembre 2022, par Zer0

  I have access to an hls manifest file which i can use to download a song.
I use the following command to download it/pipe it to stdout :
ffmpeg -i 'https://api.someurl.com/1/2/3/stream.ismd/manifest.m3u8' -vn -sn -f flv -c copy -|ffmpeg -i - -b:a 192k -f mp3 -.

  


  I am successfully able to output a playable mp3 from this command.

  


  I am looking for a way to get the same kind of result in nodejs and get a readable stream from the final download and then pipe it to createAudioResource() to make it playable in a discord voice channel.

  


  There is a nodejs module called m3u8stream which i tried using with the code mentioned below but i couldnt get it to work as my knowledge of nodejs streams is limited and the documentation is confusing to understand.

  


  const stream = new PassThrough()
let resource
const stream = m3u8stream('https://api.someurl.com/1/2/3/stream.ismd/manifest.m3u8', {parser : 'm3u8',
requestOptions : {headers : {"content-type" : "video/mp4"}}
}).pipe(stream)
stream.on('data', d=>{resource = createAudioResource(d)})
player.play(resource)


  


  This code did not work and i am assuming this has something to do with m3u8stream itself because piping the stream to fs.createWriteStream('file.mp4') as shown in their example results in a zero kb mp4 file.

  


  I am sure there is be a better tool or a way to get a stream from the manifest and get it to play on discord and i would be happy to know about them as i am not bound to use ffmpeg for this.
Any help to make this work is appreciated. Thanks !