class ActiveStorage::Analyzer::VideoAnalyzer
Extracts the following from a video blob:
-
Width (pixels)
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Height (pixels)
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Duration (seconds)
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Angle (degrees)
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Display aspect ratio
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Audio (true if file has an audio channel, false if not)
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Video (true if file has an video channel, false if not)
Example:
ActiveStorage::Analyzer::VideoAnalyzer.new(blob).metadata # => { 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 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.
Public Class Methods
# File activestorage/lib/active_storage/analyzer/video_analyzer.rb, line 23 def self.accept?(blob) blob.video? end
Public Instance Methods
# File activestorage/lib/active_storage/analyzer/video_analyzer.rb, line 27 def metadata { width: width, height: height, duration: duration, angle: angle, display_aspect_ratio: display_aspect_ratio, audio: audio?, video: video? }.compact end
© 2004–2021 David Heinemeier Hansson
Licensed under the MIT License.