ActiveStorage::Previewer::VideoPreviewer < ActiveStorage::Previewer

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 6
      def accept?(blob)
        blob.video? && ffmpeg_exists?
      end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 10
      def ffmpeg_exists?
        return @ffmpeg_exists if defined?(@ffmpeg_exists)

        @ffmpeg_exists = system(ffmpeg_path, "-version", out: File::NULL, err: File::NULL)
      end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 16
      def ffmpeg_path
        ActiveStorage.paths[:ffmpeg] || "ffmpeg"
      end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 21
    def preview
      download_blob_to_tempfile do |input|
        draw_relevant_frame_from input do |output|
          yield io: output, filename: "#{blob.filename.base}.jpg", content_type: "image/jpeg"
        end
      end
    end