EXPR-SMPTE(1)

NAME

expr-smpte - evaluate SMPTE expressions

SYNOPSIS

expr-smpte [-d] time-code1 operation time-code2

DESCRIPTION

Expr-smpte computes the result of the given SMPTE time code binary expression. SMPTE time codes are given in a HH:MM:SS:FF format, where HH is the number of hours, MM is the number of minutes (00-59), SS is the number of seconds (00-59), and FF is the frame number (00-29). Leading zeros after a colon are required. The time codes may be abbreviated by omitting earlier parts, i.e., 12 would be frame 12, and 2:05 would be frame 5 in the third second. Relative time codes may have a negative sign prefix.

The -d option turns on support for the Drop Frame Time Code. The SMPTE standard time code drops frames numbered :00 and :01 each minute, except for every 10th minute, to compensate for NTSC variance from real-clock time. This option is not implemented yet.

SEE ALSO

videodisk(1)

AUTHOR

Greg Couch