instance method probe_from

# File activestorage/lib/active_storage/analyzer/video_analyzer.rb, line 110
      def probe_from(file)
        IO.popen([ ffprobe_path,
          "-print_format", "json",
          "-show_streams",
          "-show_format",
          "-v", "error",
          file.path
        ]) do |output|
          JSON.parse(output.read)
        end
      rescue Errno::ENOENT
        logger.info "Skipping video analysis because FFmpeg isn't installed"
        {}
      end