A 30-second video will be sped up about 15x. That means the timelapse will be about 2 seconds long. If the timelapse itself is 30 seconds, there's no real way ...
The iPhone automatically does this process every 10 minutes, which results in final time-lapse videos that are always between 30 and 40 seconds in length.
Time-lapse feature on iPhone will not let you record the videos longer than 30 seconds, so if you are recording a video for even one hour, it will be time- ...