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• How to overwrite file with ffmpeg when opened with pygame.mixer.music

  11 février 2015, par Lewistrick

  I have this interesting situation in which I want to convert a lot of audio fragments using ffmpeg via subprocess.check_call() and then play them using pygame.mixer.music.play().
  But because there would be a lot of small files when converting all of them, I want to overwrite the file every time, calling it tmp.wav.

  Converting goes as follows :

  outfilename = "tmp.wav"
  
  proc_args  = ["ffmpeg"]
  
  proc_args += ["-ss", str(begin / 1000)]
  
  proc_args += ["-i", os.path.join(audiodir, infilename)]
  
  proc_args += ["-to", str(duration / 1000)]
  
  proc_args += ["-ar", str(AUDIORATE)] # sample frequency (audio rate)
  
  proc_args += ["-y"]
  
  proc_args += [outfilename]
  
  DEVNULL = open(os.devnull, 'wb')
  
  try:
  
      subprocess.check_call(proc_args, stdout = DEVNULL, stderr = DEVNULL)
  
      # print "Converting audio succeeded."
  
  except subprocess.CalledProcessError as e:
  
      print "Converting audio failed."
  
      return 0.

  Playing goes as follows :

  pygame.mixer.music.load(outfilename)
  
  pygame.mixer.music.play()

  Now, a problem arises. The first file is converted and played correctly. But when skipping to the next file, tmp.wav can’t be overwritten. I think this is due to the fact that the file is still opened in the music module, but that doesn’t say how to close the file. I already tried pygame.mixer.music.stop(), pygame.mixer.quit() and pygame.mixer.stop() before converting the new file, but none of them works.

  How do I solve this problem ?

• discord.py and ffmpeg : Play a sound effect while playing music

  26 juin 2022, par JPhusion

  I would like to play a sound effect while playing music in a vc using discord.py and ffmpeg. I know you cannot play more than one audio source at a time, so instead I am trying to pause the music, play the sound effect and continue the music.

  


  This is what I've come up with so far, but because I am playing the sound effect, the resume() method no longer works after the pause().

  


  @commands.command()
    async def sfx(self, ctx):
        try:
            voice = await ctx.author.voice.channel.connect()
        except:
            voice = ctx.guild.voice_client
        try:
            voice.pause()
            # voice.play(discord.FFmpegPCMAudio('./media/sfx/notification.mp3'))
        except:
            voice.pause()
            # voice.play(discord.FFmpegPCMAudio(executable=r"C:\Users\josh\Programming\Discord\ffmpeg\bin\ffmpeg.exe", source='./media/sfx/notification.mp3'))
        guild = self.client.get_guild(752756902525403156)
        member = guild.get_member(876292773639233596)
        print(member.activities[0].name)
        await asyncio.sleep(1)
        voice.resume()
        if member.activities[0].name == "Not playing music":
            await voice.disconnect()


  


• Adding background music that fades out with ffmpeg

  15 septembre 2019, par malbolge

  I have a piece of video that is 30fps and simply want to add overlay faint background music starting at 10 seconds. Then I want it to fade out during the last 15 seconds. I can’t find any good examples of this other than weird hacks.

  ffmpeg -i main.mp4 -i outro.mp3 -t 10 \
  
    -filter_complex "[a0][1:a]acrossfade=d=15[a];weight1:0.5" \
  
    -map '[v]' -map '[a]' out.mp4

  I get bad arguments in the filter_complex. Somethings off right there. in terms of the duration. Any help is greatly appreciated !!