2119aadf0a
* Fix attachments getting processed despite failing content-type validation * Add a restrictive ImageMagick security policy tailored for Mastodon * Fix misdetection of MP3 files with large cover art * Reject unprocessable audio/video files instead of keeping them unchanged
113 lines
3.9 KiB
Ruby
113 lines
3.9 KiB
Ruby
# 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
|
|
@vfr_threshold = options[:vfr_frame_rate_threshold]
|
|
end
|
|
|
|
def make
|
|
metadata = VideoMetadataExtractor.new(@file.path)
|
|
|
|
raise Paperclip::Error, "Error while transcoding #{@file.path}: unsupported file" unless metadata.valid?
|
|
|
|
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'
|
|
|
|
if high_vfr?(metadata) && !eligible_to_passthrough?(metadata)
|
|
@output_options['vsync'] = 'vfr'
|
|
@output_options['r'] = @vfr_threshold
|
|
end
|
|
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 eligible_to_passthrough?(metadata)
|
|
|
|
@format = @passthrough_options[:options][:format] || @format
|
|
@time = @passthrough_options[:options][:time] || @time
|
|
@convert_options = @passthrough_options[:options][:convert_options].dup
|
|
end
|
|
|
|
def high_vfr?(metadata)
|
|
@vfr_threshold && metadata.r_frame_rate && metadata.r_frame_rate > @vfr_threshold
|
|
end
|
|
|
|
def eligible_to_passthrough?(metadata)
|
|
@passthrough_options && @passthrough_options[:video_codecs].include?(metadata.video_codec) && @passthrough_options[:audio_codecs].include?(metadata.audio_codec) && @passthrough_options[:colorspaces].include?(metadata.colorspace)
|
|
end
|
|
|
|
def update_attachment_type(metadata)
|
|
@attachment.instance.type = MediaAttachment.types[:gifv] unless metadata.audio_codec
|
|
end
|
|
end
|
|
end
|