Countdown variant of MEDIA_TIME, counting down from the end of the media (string). Requires a known duration.
Zero-based frame index (number). Requires a known frame rate.
ISO 8601 time-of-day string without date, milliseconds to 3 decimal places (string).
Percentage of total duration, 0–100 (number). Requires a known duration.
Absolute time in seconds (number).
SMPTE-style timecode string (e.g. "01:00:00:00"). Requires a known frame rate.
Supported temporal formats for expressing media time values.