Class: ActiveStorage::Analyzer::VideoAnalyzer

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

Overview

Extracts the following from a video blob:

Example:

ActiveStorage::VideoAnalyzer.new(blob).metadata
# => { width: 640.0, height: 480.0, duration: 5.0, angle: 0, display_aspect_ratio: [4, 3] }

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.

.accept?	Implement this method in a concrete subclass.
.new

#blob

#metadata	Override this method in a concrete subclass.
#logger

#download_blob_to	Efficiently downloads blob data into the given file.
#download_blob_to_tempfile	Opens a new tempfile in `#tempdir` and copies blob data into it.
#tempdir	Returns the directory in which tempfiles should be opened.

This class inherits a constructor from ActiveStorage::Analyzer

[ GitHub ]

# File 'activestorage/lib/active_storage/analyzer/video_analyzer.rb', line 23


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

[ GitHub ]

# 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 }.compact
end