Module: FFMPEG::Transcoders::Autorotator

Included in:
FFMPEG::Transcoder
Defined in:
lib/ffmpeg/transcoders/autorotator.rb

Instance Method Summary collapse

Instance Method Details

#apply_autorotate ⇒ Object 



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# File 'lib/ffmpeg/transcoders/autorotator.rb', line 4

def apply_autorotate
  return unless autorotate?
  # remove the rotation information on the video stream so rotation-aware players don't rotate twice
  @raw_options[:metadata] = 's:v:0 rotate=0'
  filters = {
    90  => 'transpose=1',
    180 => 'hflip,vflip',
    270 => 'transpose=2'
  }
  @raw_options[:video_filter] = filters[@movie.rotation]
end

#autorotate? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ffmpeg/transcoders/autorotator.rb', line 21

def autorotate?
  @transcoder_options[:autorotate] && @movie.rotation && @movie.rotation != 0
end

#changes_orientation? ⇒ Boolean

we need to know if orientation changes when we scale

Returns:

  • (Boolean) 


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# File 'lib/ffmpeg/transcoders/autorotator.rb', line 17

def changes_orientation?
  autorotate? && [90, 270].include?(@movie.rotation)
end