What it does:
This is a set of 4 time code calculators that will be useful to audio/video editors. There are 2 offset calculators to add and subtract time code, one for NTSC (29.97 dfps) and one for PAL (25 fps). There is a calculator for converting a time code in NTSC to PAL and one for converting PAL to NTSC based on a 00:00:00:00 start time in both.

To install:
Download the macro file umtimecodecalculators.mex and save it to your hard drive where you store your macro file(s). Import the macros into your existing macro file by clicking File | Import | Macros.

To use:
Run the macro and enter time codes when prompted. Offset calculators default to addition, change the "+" to a "-" for subtraction when prompted for the offset. Results below 00:00:00:00 are inaccurate.

How it works:
Converts the time code to a frame count, performs the calculation, and then converts the frame count to the appropriate time code format. (Lots of math calculations provided by G. Daniel Noland) Note: 30000/1001 was used instead of 29.97 (29.97 is a rounded number) to be more accurate. Format conversions are rounded to the nearest whole frame.

Submitted by:
David Moen

David wins a Macro Express T-shirt for his submission.