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- # frozen_string_literal: true
-
- module Paperclip
- # This transcoder is only to be used for the MediaAttachment model
- # to check when uploaded videos are actually gifv's
- class Transcoder < Paperclip::Processor
- def initialize(file, options = {}, attachment = nil)
- super
-
- @current_format = File.extname(@file.path)
- @basename = File.basename(@file.path, @current_format)
- @format = options[:format]
- @time = options[:time] || 3
- @passthrough_options = options[:passthrough_options]
- @convert_options = options[:convert_options].dup
- end
-
- def make
- metadata = VideoMetadataExtractor.new(@file.path)
-
- unless metadata.valid?
- Paperclip.log("Unsupported file #{@file.path}")
- return File.open(@file.path)
- end
-
- update_attachment_type(metadata)
- update_options_from_metadata(metadata)
-
- destination = Tempfile.new([@basename, @format ? ".#{@format}" : ''])
- destination.binmode
-
- @output_options = @convert_options[:output]&.dup || {}
- @input_options = @convert_options[:input]&.dup || {}
-
- case @format.to_s
- when /jpg$/, /jpeg$/, /png$/, /gif$/
- @input_options['ss'] = @time
-
- @output_options['f'] = 'image2'
- @output_options['vframes'] = 1
- when 'mp4'
- @output_options['acodec'] = 'aac'
- @output_options['strict'] = 'experimental'
- end
-
- command_arguments, interpolations = prepare_command(destination)
-
- begin
- command = Terrapin::CommandLine.new('ffmpeg', command_arguments.join(' '), logger: Paperclip.logger)
- command.run(interpolations)
- rescue Terrapin::ExitStatusError => e
- raise Paperclip::Error, "Error while transcoding #{@basename}: #{e}"
- rescue Terrapin::CommandNotFoundError
- raise Paperclip::Errors::CommandNotFoundError, 'Could not run the `ffmpeg` command. Please install ffmpeg.'
- end
-
- destination
- end
-
- private
-
- def prepare_command(destination)
- command_arguments = ['-nostdin']
- interpolations = {}
- interpolation_keys = 0
-
- @input_options.each_pair do |key, value|
- interpolation_key = interpolation_keys
- command_arguments << "-#{key} :#{interpolation_key}"
- interpolations[interpolation_key] = value
- interpolation_keys += 1
- end
-
- command_arguments << '-i :source'
- interpolations[:source] = @file.path
-
- @output_options.each_pair do |key, value|
- interpolation_key = interpolation_keys
- command_arguments << "-#{key} :#{interpolation_key}"
- interpolations[interpolation_key] = value
- interpolation_keys += 1
- end
-
- command_arguments << '-y :destination'
- interpolations[:destination] = destination.path
-
- [command_arguments, interpolations]
- end
-
- def update_options_from_metadata(metadata)
- return unless @passthrough_options && @passthrough_options[:video_codecs].include?(metadata.video_codec) && @passthrough_options[:audio_codecs].include?(metadata.audio_codec) && @passthrough_options[:colorspaces].include?(metadata.colorspace)
-
- @format = @passthrough_options[:options][:format] || @format
- @time = @passthrough_options[:options][:time] || @time
- @convert_options = @passthrough_options[:options][:convert_options].dup
- end
-
- def update_attachment_type(metadata)
- @attachment.instance.type = MediaAttachment.types[:gifv] unless metadata.audio_codec
- end
- end
- end
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