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• Why do my Windows filenames keep getting converted in Python ?

  13 avril 2024, par GeneralTully

  I'm running a script that walks through a large library of .flac music, making a mirror library with the same structure but converted to .opus. I'm doing this on Windows 11, so I believe the source filenames are all in UTF-16. The script calls FFMPEG to do the converting.

  


  For some reason, uncommon characters keep getting converted to different but similar characters when the script runs, for example :

  


  06 xXXi_wud_nvrstøp_ÜXXx.flac

  


  gets converted to :

  


  06 xXXi_wud_nvrstøp_ÜXXx.opus

  


  They look almost identical, but the Ü and I believe also the ø are technically slightly different characters before and after the conversion.

  


  The function which calls FFMPEG for the conversion looks like this :

  


  def convert_file(pool, top, file):
    fullPath = os.path.join(top, file)
    # Pass count=1 to str.replace() just in case .flac is in the song
    # title or something.
    newPath = fullPath.replace(src_dir, dest_dir, 1)
    newPath = newPath.replace(".flac", ".opus", 1)

    if os.path.isfile(newPath):
        return None
    else:
        print("{} does not exist".format(newPath))
   
        cvt = [
            "Ffmpeg", "-v", "debug", "-i", fullPath, "-c:a", "libopus", "-b:a", "96k", newPath]
        print(cvt)

        return (
            fullPath,
            pool.apply_async(subprocess.run, kwds={
                "args": cvt,
                "check": True,
                "stdin": subprocess.DEVNULL}))


  


  The arguments are being supplied by os.walk with no special parameters.

  


  Given that the script is comparing filenames to check if a conversion needs to happen, and the filenames keep getting changed, it keeps destroying and recreating the same files every time the script runs.

  


  Why might this be happening ?

  


• A Soundboard for Discord with Discord.py with already downloaded .mp3 files

  8 août 2019, par Kerberos Kev

  I’m setting up a discord bot with discord.py, and want to implement an soundboard.The soundboard should take already downloaded .mp3 files and play them in the discord. The bot already automatically joins and disconnects from a voice channel but does not play any of my sound files.

  I tried converting the mp3 file into an opus one and just play it without ffmpeg but this didn’t work either.

  import discord
  
  from discord.ext import commands
  
  from discord.utils import get
  
  from mutagen.mp3 import MP3
  
  import time
  
  import os
  
  
  
  client = commands.Bot(command_prefix='<')
  
  a = './'+'kurz-kacken.mp3'
  
  
  
  
  
  class Soundboard(commands.Cog):
  
  
  
      def __init__(self, client):
  
          self.client = self
  
  
  
      @commands.command(pass_context=True)
  
      async def soundboard(self, ctx, songname: str):
  
          channel = ctx.message.author.voice.channel
  
          voice = get(client.voice_clients, guild=ctx.guild)
  
  
  
          if voice and voice.is_connected():
  
              await voice.move_to(channel)
  
          else:
  
              voice = await channel.connect()
  
  
  
              print(f"The bot has connected to {channel}\n")
  
  
  
          # audio = MP3('./'+'kurz-kacken.mp3')
  
          # a = audio.info.length
  
          voice.play(discord.FFmpegPCMAudio('./'+'kurz-kacken.mp3'),
  
                     after=lambda e: print("Song done!"))
  
          voice.source = discord.PCMVolumeTransformer(voice.source)
  
          voice.source.volume = 0.07
  
          # time.sleep(a)
  
          await ctx.send(f'ended')
  
  
  
          if voice and voice.is_connected():
  
              await voice.disconnect()
  
  
  
  
  
  def setup(client):
  
      client.add_cog(Soundboard(client))

• avcodec/omx : Fix handling of fragmented buffers

  17 janvier 2019, par Dave Stevenson

  avcodec/omx : Fix handling of fragmented buffers
  See https://trac.ffmpeg.org/ticket/7687
  If an encoded frame is returned split over two or more
  
  IL buffers due to the size, then there is a race between
  
  whether get_buffer will fail, return NULL, and a truncated
  
  frame is passed on, or IL will return the remaining part
  
  of the encoded frame.
  
  If get_buffer returns NULL, part of the frame is left behind
  
  in the codec, and will be collected on the next call. That
  
  then leaves a frame stuck in the codec. Repeat enough times
  
  and the codec FIFO is full, and the pipeline stalls.
  A performance improvement in the Raspberry Pi firmware means
  
  that the timing has changed, and now frequently drops into the
  
  case where get_buffer returns NULL.
  Add code such that should a buffer be received without
  
  OMX_BUFFERFLAG_ENDOFFRAME that get_buffer is called with wait
  
  set, so we wait for the remainder of the frame.
  
  This code has been made conditional on the Pi build in case
  
  other IL implementations don't handle ENDOFFRAME correctly.
  Signed-off-by : Dave Stevenson <dave.stevenson@raspberrypi.org>
  
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/omx.c