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• How to add album art with ffmpeg ?

  8 février 2024, par Adi Ricky k

  I've been stuck in adding album art to mp3 files.

  


  I've already researched and Googled this issue but haven't found a solution yet. The ffmpeg documentation recommends this script to add image (album art) to mp3 :

  


  ffmpeg -i input.mp3 -i cover.png -c copy -map 0 -map 1 -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3


  


  But it doesn't work. My console output is :

  


  Unrecognized option 'c'
Failed to set value 'copy' for option 'c'


  


  I looked for another solution and got this :

  


  ffmpeg -i input.mp3 -i cover.png -map 0:0 -map 1:0 -c copy -id3v2_version 3 -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3


  


  This returns the same output :

  


  Unrecognized option 'c'
Failed to set value 'copy' for option 'c'


  


  Anybody can help me, please ?

  


  I am using ubuntu 12.04 and ffmpeg version 0.8.6-4:0.8.6-0.

  


  Thanks.

  


• mp4 to hls ffmpeg during upload to Google storage

  13 février 2018, par Sofiia Vynnytska

  I have an API written on Java, which is used for uploading mp4 videos on front-end. We store those videos on google cloud and our application is running in google cloud. For Android clients, we need to convert uploaded videos to hls. Unfortunately, Google cloud does not have transcoder for videos and I need to convert video in another way. I found that ffmpeg can do this. But I cannot find a good solution for this and I need an advice.
  One of ideas is to deploy cloud function on google cloud, which will convert mp4 to hls after uploading video. Can I need to upload this m3u8 and ts videos to storage ? Will be this approach okay ? Is there any other possible solution ?

• installed ffmpeg not detected. Can't convert audio (python 2.7, mac os x)

  18 novembre 2017, par trezcast

  General information :

  I have a project in python that deals with audio classification ; the backend is complete but I’m suffering with the front-end. The backend requirement (that I can’t change) is that the audio file must be in wav format but I want users to be able to upload mp3 files as well. My front-end is a web server using python 2.7 and flask.

  So, I basically want to convert mp3 to wav, but keep on getting errors.
  (The complete code is at the bottom in case it is needed to understand the problem more clearly)

  My attempts :
  1- I used pydub library

  I installed homebrew, libav, and ffmpeg
  libav installation method : brew install libav —with-libvorbis —with-sdl —with-theora
  ffmpeg installation method : brew install ffmpeg —with-libvorbis —with-ffplay —with-theora

  Method1

  sound = AudioSegment.from_file(filename[i], format="mp3") #filename[i]=nameOfFile
  
  sound.export("input.wav", format="wav")

  Method2

  AudioSegment.from_file(filename[i], format="mp3").export("input.wav", format="wav")

  => Kept getting "file not found" and "cannot detect ffmpeg or avconv" runtime warning even though I installed ffmpeg and libav
  => Got same error above ("file not found") when I used "from_mp3" instead of "from_file"
  => Tried using "raw" instead of "mp3" and got "key error : sample_width" (couldn’t find what this error meant)
  Note : I made sure I’m in the right directory

  2- Used subprocess

  import subprocess
  
  subprocess.call(["ffmpeg", "-i",filename[i],"inputAudio.wav"])

  => Got "OSError : No such file or directory"

  I hope you can help me understand what the problem is and how to solve it...

  Complete Code :
  I have this at the top

  app = Flask(__name__)
  
  APP_ROOT = os.path.dirname(os.path.abspath(__file__))
  
  os.chdir(APP_ROOT)

  Inside the function that deals with the audio files

  data = request.files.getlist('file') #get all uploaded audio files
  
  fsize = len(data) #number of audio files
  
  i = 0 #index counter
  
  
  
  filename = ["" for x in range(fsize)] #LIST TO STORE EACH FILE'S NAME
  
  audiofile = ["" for x in range(fsize)] #LIST TO STORE CLASSIFICATION RESULTS OF EACH FILE
  
  
  
  
  
  #LOOP THROUGH EACH UPLOADED FILE
  
  for file in data:
  
      filename[i] = file.filename #ADD FILENAME TO LIST ABOVE
  
      destination = str(APP_ROOT)

  Problematic Part :

      if file.filename.endswith(".mp3"):
  
          from pydub import AudioSegment
  
          t = destination + "/" + filename[i]
  
          file.save(t) #SAVE UPLOADED MP3 FILE TO EXTRACT IT USING PYDUB
  
  
  
          sound = AudioSegment.from_file(filename[i], format="mp3")
  
          sound.export("input.wav", format="wav")
  
          os.remove(t) #DELETE MP3 FILE, WE ONLY WANT WAV
  
          destination +=  "/inputAudio.wav"

  Code Continuation :

  #STORE AUDIO FILE TO PREPARE FOR PROCESSING (CLASSIFICATION)
  
      else:
  
          destination +=  "/inputAudio.wav"
  
          file.save(destination)
  
  
  
  #FINAL STEP
  
      audiofile[i]=Raudio.start() #AUDIO PROCESSING (CLASSIFICATION)
  
      os.remove(destination) #DELETE AUDIO FILE TO PREVENT CLUTTERING OF FILES
  
      i += 1 #INCREMENT FILE INDEX