Character appearance timestampsSpecifies the time range in the reference video where the character appears, only supports 2-second segmentsFormat: "start_second,end_second"Example: "1,3" means the character from second 1 to second 3 in the reference video
Note:
Video must contain audio and character
Either url or from_task is required, must provide one
Time range fixed to 2-second segments (e.g., 1-3 seconds)
prompt parameter not required in this mode
Created character can be referenced in subsequent video generation using @username format