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• AAC encoder : make pe.min a local minimum

  29 novembre 2015, par Claudio Freire

  AAC encoder : make pe.min a local minimum
  As noted in a comment, pe.min in the reference encoder
  
  is centered around current pe. The bit reservoir algo
  
  needs pe.min to be a local minimum, because it can only
  
  account for local PE variations. If it’s set to a global
  
  minimum as was being done, bit reservoir logic doesn’t
  
  work as efficiently.
  This patch tries to forget old minimums and converge to
  
  a local minimum without losing the stability of the
  
  previous solution. Listening tests until now suggest this
  
  solves numerous RC issues.
  

  • [DH] libavcodec/aacpsy.c
  • [DH] tests/fate/aac.mak

• Encode multiple files from the same Folder with Google Colab & FFmpeg

  16 août 2021, par Ptibouc77

  i made a Google colab to encode my videos, but actually i can only do files on by one.
I want to encode all video files from the same folder.

  


  I tried this but didn't seem to works

  


      import os

DIRECTORY= '/content/drive/My Drive/Videos'
for filename in os.listdir(DIRECTORY):
    if (filename.endswith(".mov")): #or .avi, .mpeg, whatever.
        os.system("ffmpeg -i {0} -c:v libx265 -crf 26 -c:a aac -b:a 160k output%d.mp4".format(filename))
        print(filename)


  


  Edit : I edited the FFmpeg command but still not workings on Google Colab.
Edit 2 : Print command only return the name of the files with the extension like "MyMovie.mov" how do i put the full path to the ffmpeg command ? I also want to put the ouput files to a subfolder named x265

  


• discord.py - Playing the same audio stream in several voice channels

  13 juillet 2020, par Cyxo

  I made a Discord bot using the discord.py library which aims at playing a web radio in several voice channels. Basically it's the same audio stream for every channel.

  


  What I'm doing right now is :

  


  voice_channel.play(discord.FFmpegPCMAudio(stream_url))


  


  However every FFmpegPCMAudio uses about 10% of my CPU and there's one for each vc so eventually my bot crashed a lot when playing in 10 channels (which isn't a lot).

  


  Since it's the same stream, I tried the following :

  


  player = FFmpegPCMAudio(stream_url)
for voice_channel in vcs:
    voice_channel.play(player)


  


  But the sound was stuttering a lot (maybe it was playing the sound a bit to each sequentially like the way threading works)

  


  Can you think of any other way I could reduce the load on the CPU since it is the same audio stream playing ? Either a discord.py trick or a FFmpeg trick maybe, like manually running one FFmpeg and using it for each channel ?