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• How to install ffmpeg to Heroku ?

  11 mars 2020, par Gamer Fardin

  I am trying to build a discord bot using discord.py rewrite version, now the problem is I recently updated it to run audio from link and it works fine when I manually run the codes but once I have uploaded it to heroku it doesnt work because(I assume) ffmpeg is not in the right folder and I get the error : ffprobe/avprobe and ffmpeg/avconv not found. please install one. So does anyone how to properly install it to heroku ? Because the usual pip command isnt working...

  ’’’

      @client.command(aliases=["PlayMusic","playmusic","Playmusic","playMusic","PLAYMUSIC","playaudio"])
  
      async def play(ctx, url):
  
          song_there = os.path.isfile("song.mp3")
  
          try:
  
              if song_there:
  
                  os.remove("song.mp3")
  
          except PermissionError:
  
              await ctx.send("Wait for the current playing music end or use the 'stop' command")
  
              return
  
  
  
          voice = get(client.voice_clients, guild=ctx.guild)
  
          print(voice)
  
          ydl_opts = {
  
              'format': 'bestaudio/best',
  
              'postprocessors': [{
  
                  'key': 'FFmpegExtractAudio',
  
                  'preferredcodec': 'mp3',
  
                  'preferredquality': '192',
  
              }],
  
          }
  
          with youtube_dl.YoutubeDL(ydl_opts) as ydl:
  
              ydl.download([url])
  
          for file in os.listdir("./"):
  
              if file.endswith(".mp3"):
  
                  os.rename(file, 'song.mp3')
  
          voice.play(discord.FFmpegPCMAudio("song.mp3"))
  
          voice.volume = 100
  
          voice.is_playing()

  ’’’

• "MPEG audio header not found" error when opening with TagLib after converting with ffmpeg

  6 juillet 2015, par Avrohom Yisroel

  I converted a wma file simply by doing something like this...

  ffmpeg -i song.wma -f mp3 song.mp3

  I can then play the mp3 file in Windows Media player, so it looks like the conversion worked.

  However, if I try to open the file in TagLib, I get an error "MPEG audio header not found" on the following line...

  TagLib.File tf = TagLib.File.Create("song.mp3");

  I’ve tried this on a few wma files, so it’s not just that one that’s at fault.

  Anyone have any idea what I did wrong ? I find the docs for ffmpeg pretty overwhelming, and as a complete ignoramus in the field of audio encoding, I haven’t a clue what most of it means. Could be I’m missing something in the conversion, although that wouldn’t explain why WMP can play it but TagLib can’t open it.

• Using batch, how would you iterate through an array that you don't know how many values it may contain to run a function on each individual variable

  10 mai 2017, par Jay1995

  I have a batch file creating an array of variables it gets from a textfile, as follows :

  for /f "skip=1 tokens=9 delims= " %%a in (%findfile%) do set "_%%a=yes"
  
  set count = 0
  
  for /f "tokens=1* delims==#" %%b in ('set _') do (
  
      set /a count+=1
  
      set x=%%b
  
      set location[!count!]=!x:~1!
  
  )
  
  set %location%

  I’m trying to get each variable from the array to be looped into a function individually, but have no idea how to do it !!

  The location array storing all the variables has to be called into a for loop and the function I’m trying to get it to loop into is an FFMPEG function :

  for %%i in (%location%\*.mp4) do (if not exist "%%~ni\" MD "%%~ni"
  
  
  
      ffmpeg -i "%%i" -vframes 1 -f image2 -start_number 0 
  
      "%%~ni\%%~ni_Summary_%%3d.jpeg"
  
  
  
  )

  All HELP would be greatly appreciated