822f72387e
Bug: if ExifTool exited with status 1 because it thought the file was corrupt, then we didn't record any of the metadata, even though it was able to read most of it. It turns out there are thousands of posts with minorly corrupt metadata that ExifTool is still able to read, but will complain about. Fix: ignore the exit code of ExifTool and always save whatever metadata ExifTool is able to return. It will return an `ExifTool:Error` tag in the event of errors. Note that there are some (many?) files that are considered corrupt by ExifTool but not by Vips, and vice versa. Probably because ExifTool only parses the metadata while Vips only parses the image data.
35 lines
989 B
Ruby
35 lines
989 B
Ruby
require "shellwords"
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# A wrapper for the exiftool command.
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class ExifTool
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extend Memoist
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# @see https://exiftool.org/exiftool_pod.html#OPTIONS
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DEFAULT_OPTIONS = %q(
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-G1 -duplicates -unknown -struct --binary
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-x 'System:*' -x ExifToolVersion -x FileType -x FileTypeExtension
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-x MIMEType -x ImageWidth -x ImageHeight -x ImageSize -x MegaPixels
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).squish
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attr_reader :file
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# Open a file with ExifTool.
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# @param file [File, String] an image or video file
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def initialize(file)
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@file = file.is_a?(String) ? File.open(file) : file
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end
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# Get the file's metadata.
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# @see https://exiftool.org/TagNames/index.html
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# @param options [String] the options to pass to exiftool
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# @return [Hash] the file's metadata
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def metadata(options: DEFAULT_OPTIONS)
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output = %x(exiftool #{options} -json #{file.path.shellescape})
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json = JSON.parse(output).first
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json = json.except("SourceFile")
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json.with_indifferent_access
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end
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memoize :metadata
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end
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