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Why does video has a smaller size than photo for an iOS live-photo

I am working on an iOS project with live-photos.

Live-photo is a combination of a real photo and a small video of 3 seconds. The goal of this feature is to let the user choose which is the best picture in the video.

I have made some tests and i see that the photo is 15,356,907 bytes whereas the video is 2,088,228 bytes. I cannot explain why the video is smaller than the photo itself.

Do you think apple is recording video with poor quality ? So how will the user choose the best frame in the video if the quality is poor ?

Thanks

Solution

  • The size of the video is smaller than the size of the photo. For example, I took a live photo on my phone and the size of it was 3024 pixels by 4032 pixels. The video, on the other hand, was just 1440 pixels by 1080 pixels.