IPTC - International Press Telecommunications Council, 20 Garrick Street, London WC2E 9BT, UK Copyright 2013, IPTC, www.iptc.org, All Rights Reserved 2013-05-18T19:38:04+02:00 2008-02-29T12:00:00+00:00 2011-01-31T12:05:38+01:00 Edit Unit The editUnit is the amount of time per video frame (1s / number of frames per second) or the amount of time per audio sample (1s / number of samples per second), for which the video frame rate or audio sample rate must be known. Timestamp format: long unsigned integer. Milliseconds Time given in full milliseconds. Timestamp format: long unsigned integer. Normal Play Time Indicates the position relative to the beginning of the presentation. Timestamp format: hh:mm:ss.mmm (mmm for milliseconds). See also: RFC 2326. Seconds Time given in full seconds. Timestamp format: long unsigned integer. Time Code An SMPTE timecode containing a string encoded identification. Timestamp format: hh:mm:ss:ff (ff for frames). Time Code Drop Frame An SMPTE timecode containing a string encoded identification. Timestamp format: hh:mm:ss:ff (ff for frames). The drop frame flag should be set.