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).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.

Methods

Class Public methods

accept?(blob)

# File activestorage/lib/active_storage/analyzer/video_analyzer.rb, line 23
def self.accept?(blob)
  blob.video?
end

Instance Public methods

metadata()

# 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