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Class: ActiveStorage::Analyzer::AudioAnalyzer

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveStorage::Analyzer
Instance Chain:
self, ::ActiveStorage::Analyzer
Inherits: ActiveStorage::Analyzer
Defined in: activestorage/lib/active_storage/analyzer/audio_analyzer.rb

Overview

Active Storage Audio Analyzer

Extracts duration (seconds), bit_rate (bits/s), sample_rate (hertz) and tags (internal metadata) from an audio blob.

Example:

ActiveStorage::Analyzer::AudioAnalyzer.new(blob).metadata
# => { duration: 5.0, bit_rate: 320340, sample_rate: 44100, tags: { encoder: "Lavc57.64", ... } }

This analyzer requires the FFmpeg system library, which is not provided by Rails.

Class Attribute Summary

::ActiveStorage::Analyzer - Inherited

.analyze_later?

Implement this method in concrete subclasses.

Class Method Summary

::ActiveStorage::Analyzer - Inherited

.accept?

Implement this method in a concrete subclass.
.new

Instance Attribute Summary

::ActiveStorage::Analyzer - Inherited

#blob

Instance Method Summary

::ActiveStorage::Analyzer - Inherited

#metadata

Override this method in a concrete subclass.
#download_blob_to_tempfile

Downloads the blob to a tempfile on disk.
#instrument, #logger, #tmpdir

Constructor Details

This class inherits a constructor from ActiveStorage::Analyzer

Class Method Details

.accept?(blob) ⇒ Boolean

[ GitHub ] 

  


# File 'activestorage/lib/active_storage/analyzer/audio_analyzer.rb', line 15



def self.accept?(blob)
  blob.audio?
end


  







Instance Method Details



  

    #metadata  
  

  [ GitHub ]


  

  


# File 'activestorage/lib/active_storage/analyzer/audio_analyzer.rb', line 19



def metadata
  { duration: duration, bit_rate: bit_rate, sample_rate: sample_rate, tags: tags }.compact
end