NAME:
  timeinfo
 PURPOSE:   (one line only)
  Collect IOTA-VTI time codes from one or more video frames
 DESCRIPTION:
  Take one or more images extracted from a video file containing time
    stamps from an IOTA_VTI timer and decode time and field number.
 CATEGORY:
  Video data processing
 CALLING SEQUENCE:
  timeinfo,fnlist,otime,onum,etime,enum
 INPUTS:
  fnlist - String or string array with files names (fully qualified with
             path if needed).  The input files are expected to be single
             images extracted from a video file.  The file formats allowed
             are those that are readable by IDL's read_image utility.
 OPTIONAL INPUT PARAMETERS:
 KEYWORD INPUT PARAMETERS:
  DEBUG - Flag, if set will generate copious output and graphics.
            Use with caution.  It's best not to use this flag when
            processing a long list of files.
 OUTPUTS:
  otime  - String with the UT time of the odd field HH:MM:SS.ssss
  onum   - Long integer with the field number of the odd field
  etime  - String with the UT time of the even field HH:MM:SS.ssss
  enum   - Long integer with the field number of the even field
 KEYWORD OUTPUT PARAMETERS:
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
  see getdigits.pro for any restrictions on decoding process
 PROCEDURE:
 MODIFICATION HISTORY:
  2016/03/08, Written by Marc W. Buie, Southwest Research Institute
  2016/03/25, MWB, added DEBUG, XOFF, and YOFF keywords