sS transformTimestampAccordingToCut(S ts, L<DoubleRange> segments) {
  try {
    double time = ffmpeg_parseTimestamp(ts);
    int idx = indexOfPred(segments, r -> r.end > time);
    if (idx >= 0 && idx < l(segments)) {
      double len = 0;
      for i to idx: len += l(segments.get(i));
      DoubleRange seg = segments.get(idx);
      double ofs = time-seg.start;
      double result = len+ofs;
      S formatted = formatHoursMinutesColonSeconds(result);
      printVars_str("transformTimestampAccordingToCut", +ts, +idx, +seg, +ofs, +result, +formatted);
      ret formatted;
    } else
      ret "[cut] " + ts;
  } catch print e {
    ret ts;
  }
}

Began life as a copy of #1030676