1. Bryville's Avatar
    I was just curious to know, how much memory would iPhone 4 HD recording take, say a 1 minute video?

    (Sorry if already posted, couldn't find anything else.)
    06-14-2010 01:32 AM
  2. JustinHorn's Avatar
    I'm estimating 118 MB per min of 1280 x 720 HD recording. There are some variables though, like what compression ratio they will use on the iPhone 4, but if it's similar to the 3GS then this should be a pretty close estimate.

    Check out this long boring post I put together for more details
    With iPhone 4s improved camera and HD video, should I go 32GB? (updated) | When Will Apple?
    Last edited by Justin; 06-14-2010 at 01:39 AM.
    06-14-2010 01:37 AM
  3. Bryville's Avatar
    Thanks!
    You've really helped!
    06-14-2010 01:42 AM
  4. snakes2003g's Avatar
    good thing they bumped up my upgrade up even more cause since they did that i am getitng the 32GB model for sure.
    06-14-2010 02:02 AM
  5. Jellotime91's Avatar
    I'm betting they are using a much more efficient compression for HD than the 3GS used for VGA.

    Flip can record 1hr of HD video in 4GB. I'd imagine iPhone 4 uses compression exactly like this or better.
    06-14-2010 03:04 AM
  6. JustinHorn's Avatar
    When I did these calculations last year for the 3GS my higher end estimate for the compression ratio was 60:1. Using this it would be more like 79 MB / min, or 4.6 GB / hour.
    06-14-2010 08:17 AM
  7. DataCentre's Avatar
    Looks like I'm going to be getting the 32GB phone.
    06-14-2010 10:10 AM
  8. Luckyi's Avatar
    I just convinced myself to just stay with the 16GB and save money, but after reading this I may have to just get the 32GB now. Ahhh!!
    06-14-2010 04:13 PM
  9. JustinHorn's Avatar
    UPDATE
    Looks like Apple did step up the compression ratio closer to 60:1 as a sample video that leaked out shows it's about 83.4 MB / min.

    The pics are 2.7 (close to my 2.7 MB guess).



    More Here:
    iPhone 4 picture and HD video sizes confirmed, gets upgraded video compression | When Will Apple?
    06-18-2010 10:50 AM
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