max_duration

The full duration of internal content that is available (a time difference in nanoseconds using the time coordinates of the internal content).

This will act as a cap on the in_point of the element (which is in the same time coordinates), and will sometimes be used to limit the duration of the element in the timeline.

For example, for a VideoUriSource that references some media file, this would be the length of the media file.

For elements that have no internal content, or whose content is indefinite, this should be kept as CLOCK_TIME_NONE.