Beware of iPhone 6s in 16GB | 4K = 1GB a minute

Discussion in 'iPhone' started by Cuniac, Sep 12, 2015.

  1. Cuniac macrumors 6502a

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    #1
    So there is going to be a huge problem for people choosing iPhone 6s in 16GB. That problem is 4K video recording.

    Apple announced this amazing new feature for the 6s. The inherent problem with this upgrade is that the video size is going to increase dramatically. Currently with my iPhone 6, one hour of 1080p video takes up 10.1GB. Luckily most of us are not taking 1hour of video at a time, but all the little video clips add up quickly. This already means that the 16GB model did not leave much space for anything else when your taking video.

    Now lets talk 4k Video. 4K is four times the resolution of 1080p. This means that file size is going to be gigantic even with the h.265 compression. For example Tears of the Sun, a 4K short filmed at 23 FPS (7 less that what the iPhone will shoot) is only 12minutes. The file size 11.9GB. That's about 1GB per minute. So after the 16GB format and ISO install you left with about 14GB giving you only 14min of Video space if you install nothing else on the phone.

    Please take this into consideration if you are getting the 6s.
     
  2. Pez555 macrumors 68000

    Pez555

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  3. terraphantm macrumors 68040

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    #3
    Video from the iPhone will be more compressed than a short film.
     
  4. skwood macrumors 6502a

    skwood

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    #4
    From preview videos of the 6s, the space Apple reckons for 4K per minute is ~375MB
     
  5. Havok83 macrumors regular

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  6. skwood macrumors 6502a

    skwood

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  7. skwood macrumors 6502a

    skwood

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    #7
    Yes and at either 30fps or 60fps

    You can also select the speed and resolution of Slo-mo
     
  8. TonyC28 macrumors 65816

    TonyC28

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    #8
    If this is correct, and I'm not saying it isn't, it sounds like 128GB will be used up in a hurry as well. Sounds like we're going to need to transfer videos off of our phones if we want to keep space freed up.
     
  9. aka777 macrumors 6502a

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  10. skwood macrumors 6502a

    skwood

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    #10
    My concern is for those on low-data contracts using iCloud Photo Library. Dragging 4k videos down from the cloud is going to be the biggest problem. Remember that your Library takes up a fraction of its actual size when IPL is activated but requires the download of the full res images and videos every time.
     
  11. Cuniac thread starter macrumors 6502a

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    #11
    You could be right. I was mainly going off of that it was already compressed with h.265. If I use the example someone else posted with 375MB per min its 22GB per hour.
     
  12. iamMacPerson macrumors 68030

    iamMacPerson

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    #12
    Since this is taking over for my point and shoot, I'm glad I went 128GB. Just wish it had stereo mics.
     
  13. thekb macrumors 6502a

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    #13

    Interesting they are finally allowing some user control of video size and quality. I wonder if they'll update the camera app to allow different resolutions and aspect ratios for photos as well. And if so, I wonder if the people who staunchly poopooed the need for it will herald it as "magical"?
     
  14. franpincho macrumors newbie

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    #14
    Fixed.
     
  15. Q-Dog macrumors 6502

    Q-Dog

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    #15
    I'm pretty sure 4K video shot on a tiny phone sensor and lens is going to look AMAZING!
     
  16. nutmac macrumors 68040

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    #16
    Does anyone know whether iPhone 6s even support H.265 (HEVC) compression? I heard from various sources that FaceTime uses H.265, but iPhone 6s spec mentions only H.265 for video.
     
  17. Zirel Suspended

    Zirel

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    #17
    No.

    Data is wrong.

    Predicaments are unlike how it works.
     
  18. tann macrumors 68000

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    #18
    Please get facts right before stating your estimate as facts. We already know space needed for 4k video is 375mb/minute. See the picture above!
     
  19. mattopotamus macrumors G4

    mattopotamus

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    #19
    rather have 1080p at 60 fps than 4k at 30
     
  20. masotime macrumors 68000

    masotime

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    #20
    As mentioned above, 4K video does not take up 1 GB per minute.

    The precise bitrate is 50 megabits / sec, which translates to 6.25 megabytes / sec or 375 megabytes / minute. This is barely more than 1/3 of the figure you are plucking out of thin air.

    As to whether it is utilizing the HEVC codec... this is debatable. h.265 is supposed to provide the same quality at half the bitrate, and most 4k consumer digital cameras now record at 100Mbps. If we read the given bitrate of 50Mbps as an implication that the codec is h.265, that would be good, but I wouldn't put too much stock on that speculation.

     
  21. leebroath macrumors 6502

    leebroath

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  22. C DM macrumors Westmere

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    #22
    It can.
     
  23. leebroath macrumors 6502

    leebroath

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  24. masotime macrumors 68000

    masotime

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    #24
  25. brand macrumors 601

    brand

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    #25
    I wonder how many people won't get what you truly meant.
     

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