Module: FFMpeg::AudioOptions

Included in:
FFMpeg
Defined in:
lib/ffmpeg/audio_options.rb

Instance Method Summary collapse

Instance Method Details

#audio_bitrate(bitrate) ⇒ Object

Set the audio bitrate in bit/s (default = 64k).



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# File 'lib/ffmpeg/audio_options.rb', line 14

def audio_bitrate(bitrate)
  FFMpegCommand << "-ab #{bitrate}"
end

#audio_channels(number) ⇒ Object

Set the number of audio channels (default = 1).



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# File 'lib/ffmpeg/audio_options.rb', line 19

def audio_channels(number)
  FFMpegCommand << "-ac #{number}"
end

#audio_codec(codec) ⇒ Object

Force audio codec to codec. Use the copy special value to specify that the raw codec data must be copied as is.



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# File 'lib/ffmpeg/audio_options.rb', line 29

def audio_codec(codec)
  FFMpegCommand << "-acodec #{codec}"
end

#audio_frames(number) ⇒ Object

Set the number of audio frames to record.



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# File 'lib/ffmpeg/audio_options.rb', line 4

def audio_frames(number)
  FFMpegCommand << "-aframes #{number}"
end

#audio_language(code) ⇒ Object

Set the ISO 639 language code (3 letters) of the current audio stream.



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# File 'lib/ffmpeg/audio_options.rb', line 43

def audio_language(code)
  FFMpegCommand << "-alang #{code}"
end

#audio_sampling(frequency) ⇒ Object

Set the audio sampling frequency (default = 44100 Hz).



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# File 'lib/ffmpeg/audio_options.rb', line 9

def audio_sampling(frequency)
  FFMpegCommand << "-ar #{frequency}"
end

#disable_audio ⇒ Object

Disable audio recording.



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# File 'lib/ffmpeg/audio_options.rb', line 24

def disable_audio
  FFMpegCommand << "-an"
end

#new_audio ⇒ Object

Add a new audio track to the output file. If you want to specify parameters, do so before -newaudio (-acodec, -ab, etc..). Mapping will be done automatically, if the number of output streams is equal to the number of input streams, else it will pick the first one that matches. You can override the mapping using -map as usual. Example:

ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio



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# File 'lib/ffmpeg/audio_options.rb', line 38

def new_audio
  FFMpegCommand << "-newaudio"
end