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Thema: How much video can be stored on a 4Mb sd card

  1. #1
    Brian
    Gast

    How much video can be stored on a 4Mb sd card

    How many minutes of 1280 x 720 (HD) video can be stored on a 4 Gb sd
    card?
    I am currently looking at still video camera's that can record HD
    video.

    Regards Brian

  2. #2
    BJ
    Gast

    Re: How much video can be stored on a 4Mb sd card

    On Sat, 30 Apr 2011 19:35:20 +1200, Brian <bclark@es.co.nz> wrote:

    >How many minutes of 1280 x 720 (HD) video can be stored on a 4 Gb sd
    >card?
    >I am currently looking at still video camera's that can record HD
    >video.
    >
    >Regards Brian


    Not enough information.

    What bitrate? (Take some sample footage and look.)

    Once you get the average bit-rate that the camera uses, then it's
    just a matter of simple math to figure it out. (Sample: 5mb/s is
    0.625MB/s, or 3.5 megabytes/minute or about 2.2GB/hour.)

    Keep in mind if your camera uses a variable bit-rate, high-detail
    scenes (or scenes with a lot of movement) will use more memory.

    Also make sure your SD card is fast enough to capture the
    video. (Yes, speed matters.)

    (And if you want to do none of the above, download the camera
    manual, and they usually have some sort of general guidelines
    on how much storage/minute is needed, or how many minutes of
    video can be put on a particular card size...)

    BJ
    --
    I have nothing important to say...

  3. #3
    Brian
    Gast

    Re: How much video can be stored on a 4Mb sd card

    BJ <backroadjunkie@sbcglobal.net> wrote:

    >On Sat, 30 Apr 2011 19:35:20 +1200, Brian <bclark@es.co.nz> wrote:
    >
    >>How many minutes of 1280 x 720 (HD) video can be stored on a 4 Gb sd
    >>card?
    >>I am currently looking at still video camera's that can record HD
    >>video.
    >>
    >>Regards Brian

    >
    >Not enough information.
    >
    >What bitrate? (Take some sample footage and look.)
    >
    >Once you get the average bit-rate that the camera uses, then it's
    >just a matter of simple math to figure it out. (Sample: 5mb/s is
    >0.625MB/s, or 3.5 megabytes/minute or about 2.2GB/hour.)
    >
    >Keep in mind if your camera uses a variable bit-rate, high-detail
    >scenes (or scenes with a lot of movement) will use more memory.
    >
    >Also make sure your SD card is fast enough to capture the
    >video. (Yes, speed matters.)
    >
    >(And if you want to do none of the above, download the camera
    >manual, and they usually have some sort of general guidelines
    >on how much storage/minute is needed, or how many minutes of
    >video can be put on a particular card size...)
    >
    >BJ


    Thanks BJ.
    Maybe I should have asked what is the minimum length of video I can
    fit on a 4 Gb card (using a high quality setting). I like your
    suggestion of looking up this information in the camera's manual as
    manufactors are starting to put a pdf version of manuals for download
    on he internet.

    If I can fit 1 hour of video on a 4 Gb card then I'd be happy.

    It would be nice if pocket sized camera's allowed you to add two SD
    cards, one for still photos and the other for videos. That way you
    should not use up the SD card with videos and not have enough room to
    store good quality photos.

    Regards Brian

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