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question about ethernet security cameras

Discussion in 'Security Alarms' started by mike, Jan 14, 2004.

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  1. mike

    mike Guest

    I have a question about ethernet security cameras. How much disk
    space is required to store good qualitly suvelence video. What
    resoultion camera is needed will I need better than 640 x 480 vga to
    get decent quality video. With software I know you can compress the
    video to mpeg.
     
  2. Aegis

    Aegis Guest

    I have a question about ethernet security cameras. How much disk
    Depends on the length of time you want to store... Keeping video for a year
    will take a lot more space than keeping the last 30 days.
     
  3. Jackcsg

    Jackcsg Guest

    Mike, Network Cameras can be set up to record in a variety of ways. Always
    on. Scheduled recording. Event Recording (Motion or Alarm Activated) etc.
    Recording all the time can even be throttled to certain images per second.
    Panasonic makes great and reasonably priced Network Cameras (Ethernet) from
    fixed focal all the way to Pan/Tilt/Zoom. Here's my demo site of the quality
    from this little $320.00 Camera.
    http://instalink.myvnc.com

    Check it out, and I'll tell you some more of what it can do.

    Jack
     
  4. mike

    mike Guest

    I think you guys misunderstood the question or I asked it wrong. I
    want to know how good the image is and how much disk space does the
    image require. thanks
     
  5. Jackcsg

    Jackcsg Guest

    Did you click on the link I gave you? Image is great. Disk space can be
    programmed. Full time record? How images per second would you be recording?
    How you set up the recording plays role to how much disk space you take up.
    Also the compression format plays a role. Jpeg, Mjpeg, codec, etc. All the
    cameras have specs that help you to figure out what's best for your
    particular needs. I can get you some Panasonic specs on either their
    consumer Network Cameras, or the Pro side of things. Also too bandwidth
    plays a role. If you were more specific I could help you better.

    Jack
     
  6. Aegis

    Aegis Guest

    Images are quite clear... Very good, in fact... And noone can answer how
    much disk space, unless you can provide:
    1) How much video do you want to store (length of time)?
    2) Frame Rate that you want/can live with.
    3) You want it always recording or only recording on motion/event?
     
  7. Juan Gomez

    Juan Gomez Guest

    Regarding HDD space you must take into account:

    1) Frame rate (Frames per second)
    2) Retention time (how many days you will need to store)
    3) Compression Method and the compression ratio using this compression
    method, and also resolution of the recording equipment (All this will
    be related to the quality, but quality cannot be measured right now,
    up to now it's totally subjective)
    4) Activity: if you want to save all, or just the parts that has some
    movements or alarms.
    5) The images to be recorded: compression ratios are statistical, it's
    not the same to record a blank wall than a complex paint. Also
    movement in the image and the camera affects compression ratio.

    But as to help you quickly with your question, 1,5K to 20k bytes per
    frame can be found frequently at CIF resolution on most DVR.

    At 100% activity recording:

    Hdd Size=frame size * 60 seconds * 60 minutes * 24 Hours * days *
    frames_per_second * number_of_cameras

    So for example for 2k frame size, 30 frames/second, 1 day, recording
    all the time Hdd Size is approximately 5.2 Gig per day per camera!

    Hope this help.

    Regards

    Juan
     
  8. rory

    rory Guest

    for example:

    I get 28 days approx on motion recording, using 8 cameras, at 5pps,
    with a 320GB DVR, from GE Interlogix (Kalatel). This is in the highest
    quality mode.

    Rory
     
  9. Aegis

    Aegis Guest

    Trying to remember which system it was that let me change between CIF, 2CIF,
    and 4CIF... Dammit... Just put it in about 2 months ago too...
     
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