The video composition instructions.
- iOS 4.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
The array contains instances of
AVVideo. For the first instruction in the array,
time must be less than or equal to the earliest time for which playback or other processing will be attempted (typically
k). For subsequent instructions,
time must be equal to the prior instruction's end time. The end time of the last instruction must be greater than or equal to the latest time for which playback or other processing will be attempted (typically be the duration of the asset with which the instance of
AVVideo is associated).