Class: ActiveStorage::Analyzer::VideoAnalyzer
- Inherits:
-
ActiveStorage::Analyzer
- Object
- ActiveStorage::Analyzer
- ActiveStorage::Analyzer::VideoAnalyzer
- Defined in:
- activestorage/lib/active_storage/analyzer/video_analyzer.rb
Overview
Active Storage Video Analyzer
Extracts the following from a video blob:
-
Width (pixels)
-
Height (pixels)
-
Duration (seconds)
-
Angle (degrees)
-
Display aspect ratio
-
Audio (true if file has an audio channel, false if not)
-
Video (true if file has an video channel, false if not)
Example:
ActiveStorage::Analyzer::VideoAnalyzer.new(blob).
# => { width: 640.0, height: 480.0, duration: 5.0, angle: 0, display_aspect_ratio: [4, 3], audio: true, video: true }
When a video’s angle is 90, -90, 270 or -270 degrees, its width and height are automatically swapped for convenience.
This analyzer requires the FFmpeg system library, which is not provided by Rails.
Instance Attribute Summary
Attributes inherited from ActiveStorage::Analyzer
Class Method Summary collapse
Instance Method Summary collapse
Methods inherited from ActiveStorage::Analyzer
Constructor Details
This class inherits a constructor from ActiveStorage::Analyzer
Class Method Details
.accept?(blob) ⇒ Boolean
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# File 'activestorage/lib/active_storage/analyzer/video_analyzer.rb', line 25 def self.accept?(blob) blob.video? end |
Instance Method Details
#metadata ⇒ Object
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# File 'activestorage/lib/active_storage/analyzer/video_analyzer.rb', line 29 def { width: width, height: height, duration: duration, angle: angle, display_aspect_ratio: display_aspect_ratio, audio: audio?, video: video? }.compact end |