Record in arabic numerals the running time of a film or video in minutes (rounded up to the nearest minute).  For film, follow the running time with the length in feet.  Record this information following the unit count, or if applicable, the video technical specification.  Do not use video counters to measure minutes since these are location devices and do not measure time.

300 ## $a 10 film reels of 10 (108 min., 9,718 ft.) : $b sd., col. ; $c 35 mm. $3 viewing print.

300 ## $a 1 videocassette of 1 (Beta) (60 min.) : $b sd., col. ; $c 1/2 in. $3 viewing copy.

Optionally, record running time in minutes and seconds.

Optionally, record either running time or footage for film.

For film copies of works from the silent era, footage is more accurately measured than running time due to variations in the speed of hand-cranked cameras.  To accurately calculate running time, the number of frames per second must be known.  See 5C5.

For 65-70 mm. film, footage is also more accurately measured than running time.  To accurately calculate running time, the number of frames per foot and the number of frames per second must be known.  See 5C5.

If the work is not measured, give an approximate running time and/or footage, if available.  Precede the numerals by the abbreviation "ca." (circa).  Give an explanation for the estimation in a note, if necessary.  See 7B15.

300 ## $a 1 videocassette of 1 (D3) (ca. 90 min.) : $b sd., col. ; $c 1/2 in. $3 master.

300 ## $a 3 film reels of 3 (ca. 30 min., ca. 2,700 ft.) : $b sd., b&w ; $c 35 mm. $3 dupe neg.

500 ## $a Estimated length is from donor's list. $5 DLC (Use institution’s local code.)

For charts that convert footage to minutes and vice versa, see Appendix E.

For film, when either running time or footage is not measured but is converted from an exact figure, consider only the converted number to be estimated.

300 ## $a 1 film reel of 1 (27 min., ca. 972 ft.) : $b sd., col. ; $c 16 mm. $3 viewing print.

When known, indicate conditions such as stretch printing and time compression in notes.  See 7B14.

Optionally, do not consider running time or footage to be estimated if this information is taken from accompanying material or a secondary source.  Use "ca." only to indicate a guess that is not supported by a source.

See also:

5B.  Extent of work and specific material designation

5.  Physical Description Area