Class: ActiveStorage::Analyzer::AudioAnalyzer

Inherits:
ActiveStorage::Analyzer show all
Defined in:
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.

Instance Attribute Summary

Attributes inherited from ActiveStorage::Analyzer

#blob

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ActiveStorage::Analyzer

analyze_later?, #initialize

Constructor Details

This class inherits a constructor from ActiveStorage::Analyzer

Class Method Details

.accept?(blob) ⇒ Boolean

Returns:

  • (Boolean) 


15
16
17
 
# File 'lib/active_storage/analyzer/audio_analyzer.rb', line 15

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

Instance Method Details

#metadata ⇒ Object 



19
20
21
 
# File '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