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• how to combine multiple ffmpeg commands into one command ?

  22 juin 2023, par sonam

  Right now, I am running separate commands to reduce volume, add fade in at start and fade out audio at end, add silence to start and end of audio. How do I combine all these single command into one ?

  


  ffmpeg -y -i /home/music/memories.mp3 -filter:a "volume=0.5" -write_xing 0 /home/music/memories-volume.mp3
ffmpeg -y -i /home/music/memories-volume.mp3 -af "afade=in:st=0:d=5,afade=t=out:st=5:d=5" -write_xing 0 /home/music/memories-fade.mp3
ffmpeg -y -i /home/music/memories-fade.mp3 -af areverse,apad=pad_dur=5s,areverse -write_xing 0 /home/music/memories-silence-front.mp3
ffmpeg -y -i /home/music/memories-silence-front.mp3  -af apad=pad_dur=5s -write_xing 0 /home/music/memories-silence-end.mp3


  


• Processing files and then re-uploading with fog and carrierwave fails on production

  2 mars 2015, par Laurie

  So I’m trying to get use carrierwave and fog to upload a file to my server, processing that file using ffmpeg to cut it into multiple small files, then upload those to s3.

  This works locally (no fog, just file storage), but breaks on production with this error :

  NoMethodError: undefined method 'to_file' for #CarrierWave::Storage::Fog::File:0x0000000639a458>

  And this trace :

  /var/deploy/webapp/web_head/shared/bundle/ruby/2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb 259:in `store'
  
  …gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb:  80:in `store!'
  
  …s/carrierwave-0.10.0/lib/carrierwave/uploader/store.rb:  59:in `block in store!'
  
  …rrierwave-0.10.0/lib/carrierwave/uploader/callbacks.rb:  17:in `with_callbacks'
  
  …s/carrierwave-0.10.0/lib/carrierwave/uploader/store.rb:  58:in `store!'
  
  …2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/mount.rb: 375:in `store!'
  
  …2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/mount.rb: 207:in `store_audio!'
  
  …/20150227144932/app/controllers/podcasts_controller.rb:  60:in `update'
  
  …2.0/gems/actionview-4.2.0/lib/action_view/rendering.rb:  30:in `process'
  
  …_language-2.0.5/lib/http_accept_language/middleware.rb:  14:in `call'
  
  …red/bundle/ruby/2.2.0/gems/rack-1.6.0/lib/rack/etag.rb:  24:in `call'
  
  …/ruby/2.2.0/gems/rack-1.6.0/lib/rack/conditionalget.rb:  38:in `call'
  
  …red/bundle/ruby/2.2.0/gems/rack-1.6.0/lib/rack/head.rb:  13:in `call'
  
  …/2.2.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb: 225:in `context'
  
  …/2.2.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb: 220:in `call'

  So, I have two uploaders. The uploader for the small chopped up audio files just sets the storage to fog, that’s it.

  After uploading the big audio file I run this processing function in the uploader (though the error doesn’t seem to come from here) :

  def split
  
    directory = File.dirname(current_path)
  
    tmpfile = File.join(directory,'tmpfile.mp3')
  
    File.rename(current_path,tmpfile)
  
    File.chmod(0644,tmpfile)
  
  
  
    sound = FFMPEG::Movie.new(tmpfile)
  
    @model.length = Mp3Info.open(tmpfile).length.round
  
  
  
  
  
    i=0
  
    number_of_lines= @model.ordered_lines.length
  
    lines = @model.ordered_lines
  
    while icode>

  Any ideas ?

• How to add album art with ffmpeg ?

  17 juillet 2016, par Adi Ricky k

  Everybody, I’ve stuck to add album art on mp3 files.

  I already research and Googling about this issue but not solution yet, on ffmpeg documentation to add image (album art) to mp3 use this script :

  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

  Source from : http://www.ffmpeg.org/ffmpeg-all.html#mp3

  But it’s doesn’t work on my console output is :

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

  I looking for another solution and I get from : http://trac.ffmpeg.org/ticket/2221 :

  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

  Also return same output, I already research why return :

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

  But there are no body have same problem.
  anybody can help me, please ?

  nb : I use ubuntu 12.04 and ffmpeg version 0.8.6-4:0.8.6-0.
  thanks