Grab an offset in seconds from a UTC timecode on a Unified Streaming Server. Takes it to account encoder reconnects / restarts. This is the Ruby version.

offset_from_timecode.rb

def offset_from_timecode (nokogiri_doc, start_pos_utc, in_point_utc)
      video_el = nokogiri_doc.search('video').first
      c_els = video_el.css('c')
      final_c_els = []
      total_seconds = 0
      start_pos_time = Time.parse(start_pos_utc.to_s)

      c_els.each do |c_el|
        end_of_c_utc = DateTime.parse(c_el['end'])
        final_c_els << c_el  if end_of_c_utc > in_point_utc
        end
      end

      final_c_els.each do |c_el|
        start_of_c_utc = DateTime.parse(c_el['start'])
        end_of_c_utc = DateTime.parse(c_el['end'])
        start_of_c_time = Time.parse(c_el['start'])
        end_of_c_time = Time.parse(c_el['end'])

        # override starts if they fall into the middle part
        if (in_point_utc >= start_of_c_utc && in_point_utc <= end_of_c_utc)
          start_of_c_utc = in_point_utc
          start_of_c_time = Time.parse(in_point_utc.to_s)
        end

        if start_pos_utc < end_of_c_utc
         break  if start_pos_utc < start_of_c_utc
          else
            total_seconds += (start_pos_time - start_of_c_time)
          end
        else
          total_seconds += (end_of_c_time - start_of_c_time)
        end
      end
      total_seconds
    end