Compact Flash Store

Need to understand.Does memory card I buy have to be compatible to amount of pixels on computer? What is best size?

In my Kodak camera.

What is SD card? and also tell me about various types of memory card. Which is the best among them?

I ahve a 6.0 megapixels camera and i want to know got many pictures a 1gb memory card can hold for it

i have a 10.1 mpg camera, and one specific 2 gb cf card that used to hold about 400 fine compression large images.
now, with the same compression and size, my card can only hold 150 images.
why is this?

approx.?

It depends entirely on the quality of the video you're saving.
VCD Quality MPEG? About 48 minutes. HD Video? about 2 minutes. SVCD quality? About 28 minutes. If you posted the format of the video, a more concise answer good be given.
The question, as asked, would be like asking how many miles per gallon does my car get? The answer is who knows - what kind of car and driving do you do?

im using a sony dslr a200

I purchased a new camera and it came w/ a 16MB memory card. It does not hold that many pitcures of course so I was told to get a 1 or 2 GB memory card.

You're looking at around 2mb-3mb for a reasonably decent size image so maybe 400 or so. I've got a 1gb card on a Canon EOS 300D and at the top JPG quality get around 300 or so photos.