Mac osx ffmpeg aac

最新推荐文章于 2023-06-21 17:56:41 发布

logcabin

最新推荐文章于 2023-06-21 17:56:41 发布

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  # using libfaac on Mac OS X 10.6.8
 
 
 
 
  
  # -vn : not copying video
 
 
 
 
  
  # -acodec : specify codec used in flv file
 
 
 
 
  
  # -ac : channels. 1 is for mono, 2 is for stereo
 
 
 
 
  
  # -ab : specify bitrate for output file (note that rate is not kbps but bps)
 
 
 
 
  
  # -ar : sampling frequency (Hz)
 
 
 
 
  
  # -threads: number of threads for encoding
 
 
 
 
  
  # "-strict experimental" is necessary to use libfaac
 
 
 
 
  
   
 
 
 
 
  
  ffmpeg -y -i xxxxxxxxxxx.flv -vn -acodec aac -ac 2 -ab 128000 -ar 44100 -threads 4 -strict experimental xxxxx.m4a
 
 
 
 
  
   
 
 
 
 
  
  # note that codec is 'libmp3lame'
 
 
 
 
  
  ffmpeg -i xxxxxxxxxx.m4a -vn -acodec libmp3lame -ac 2 -ab 128 -ar 44100 -threads 4 -f mp3 zzzzzzzzzzz.mp3
 
 
 
 
  
   
 
 
 
 
  
  # or you can directly convert audio track
 
 
 
 
  
  ffmpeg -i xxxxxxxxxxx.flv -vn -acodec libmp3lame -ac 2 -ab 128000 -ar 44100 -threads 4 -f mp3  xxxxx.mp3
 
 
 
 
  
   
 
 
 
 
  
  # for wav -acodec option is not necessary
 
 
 
 
  
  ffmpeg -i xxxxxxxxxx.flv -vn -threads 4 -ac 1 -ar 44100 xxxxxx.wav
 
 
 
 
  
   
 
 
 
 
  
  # for ogg
 
 
 
 
  
  ffmpeg -i xxxxxxxxxx.flv -vn -threads 4 -acodec libvorbis -ac 2 -ar 44100 xxxxxxx.ogg
 
 
 
 
  
   
 
 
 
 
  
  # 単純に音声をコピー
 
 
 
 
  
  ffmpeg -i xxxxxxxxxx -vn -threads 4 -acodec copy output.filename
 
 
 
 

 
 
 
 
  
  https://gist.github.com/ymotongpoo/1342656#file-gistfile1-sh-L1