diff options
Diffstat (limited to 'activestorage/lib/active_storage/analyzer')
| -rw-r--r-- | activestorage/lib/active_storage/analyzer/image_analyzer.rb | 3 | ||||
| -rw-r--r-- | activestorage/lib/active_storage/analyzer/video_analyzer.rb | 65 |
2 files changed, 47 insertions, 21 deletions
diff --git a/activestorage/lib/active_storage/analyzer/image_analyzer.rb b/activestorage/lib/active_storage/analyzer/image_analyzer.rb index 25e0251e6e..5231168a7c 100644 --- a/activestorage/lib/active_storage/analyzer/image_analyzer.rb +++ b/activestorage/lib/active_storage/analyzer/image_analyzer.rb @@ -9,8 +9,7 @@ module ActiveStorage # # => { width: 4104, height: 2736 } # # This analyzer relies on the third-party {MiniMagick}[https://github.com/minimagick/minimagick] gem. MiniMagick requires - # the {ImageMagick}[http://www.imagemagick.org] system library. These libraries are not provided by Rails; you must - # install them yourself to use this analyzer. + # the {ImageMagick}[http://www.imagemagick.org] system library. class Analyzer::ImageAnalyzer < Analyzer def self.accept?(blob) blob.image? diff --git a/activestorage/lib/active_storage/analyzer/video_analyzer.rb b/activestorage/lib/active_storage/analyzer/video_analyzer.rb index 1c144baa37..656e362187 100644 --- a/activestorage/lib/active_storage/analyzer/video_analyzer.rb +++ b/activestorage/lib/active_storage/analyzer/video_analyzer.rb @@ -9,41 +9,40 @@ module ActiveStorage # * Height (pixels) # * Duration (seconds) # * Angle (degrees) - # * Aspect ratio + # * Display aspect ratio # # Example: # # ActiveStorage::VideoAnalyzer.new(blob).metadata - # # => { width: 640, height: 480, duration: 5.0, angle: 0, aspect_ratio: [4, 3] } + # # => { width: 640.0, height: 480.0, duration: 5.0, angle: 0, display_aspect_ratio: [4, 3] } # - # This analyzer requires the {ffmpeg}[https://www.ffmpeg.org] system library, which is not provided by Rails. You must - # install ffmpeg yourself to use this analyzer. + # When a video's angle is 90 or 270 degrees, its width and height are automatically swapped for convenience. + # + # This analyzer requires the {ffmpeg}[https://www.ffmpeg.org] system library, which is not provided by Rails. class Analyzer::VideoAnalyzer < Analyzer - class_attribute :ffprobe_path, default: "ffprobe" - def self.accept?(blob) blob.video? end def metadata - { width: width, height: height, duration: duration, angle: angle, aspect_ratio: aspect_ratio }.compact + { width: width, height: height, duration: duration, angle: angle, display_aspect_ratio: display_aspect_ratio }.compact end private def width - rotated? ? raw_height : raw_width + if rotated? + computed_height || encoded_height + else + encoded_width + end end def height - rotated? ? raw_width : raw_height - end - - def raw_width - Integer(video_stream["width"]) if video_stream["width"] - end - - def raw_height - Integer(video_stream["height"]) if video_stream["height"] + if rotated? + encoded_width + else + computed_height || encoded_height + end end def duration @@ -54,16 +53,40 @@ module ActiveStorage Integer(tags["rotate"]) if tags["rotate"] end - def aspect_ratio + def display_aspect_ratio if descriptor = video_stream["display_aspect_ratio"] - descriptor.split(":", 2).collect(&:to_i) + if terms = descriptor.split(":", 2) + numerator = Integer(terms[0]) + denominator = Integer(terms[1]) + + [numerator, denominator] unless numerator == 0 + end end end + def rotated? angle == 90 || angle == 270 end + def computed_height + if encoded_width && display_height_scale + encoded_width * display_height_scale + end + end + + def encoded_width + @encoded_width ||= Float(video_stream["width"]) if video_stream["width"] + end + + def encoded_height + @encoded_height ||= Float(video_stream["height"]) if video_stream["height"] + end + + def display_height_scale + @display_height_scale ||= Float(display_aspect_ratio.last) / display_aspect_ratio.first if display_aspect_ratio + end + def tags @tags ||= video_stream["tags"] || {} @@ -89,5 +112,9 @@ module ActiveStorage logger.info "Skipping video analysis because ffmpeg isn't installed" {} end + + def ffprobe_path + ActiveStorage.paths[:ffprobe] || "ffprobe" + end end end |