Timecode Calculator Widget is the software to perform basing operations on video timings. You can add, subtract, multiply or divide pieces of video tapes in many formats. It is also possible to convert calculated values between formats without re-entering values.
MAGOSILVAN Useful little app. I only suggest to slightly reduce the dimension and add a "hh:mm:ss:fr" string over the input/result window. (Version 1.1.6)