def get_abs_frame_number(self, rel_frame_number: int) -> int:
        "Returns absolute frame number in the task (in the range [start, stop, step])"
        return super()._get_abs_frame_number(self._db_task.data, rel_frame_number)
Returns absolute frame number in the task (in the range [start, stop, step])
cvat/apps/engine/frame_provider.py