depends on your frame rate (fps) and video quality. if you know the size of each frame then the answer in minutes is: 4Gb / [(size of each frame in Mb) * fps * 60 /1024]
It hold about 100 pictures.
it can hold about 5-10 hours depending on video resolution.
I have a DV520 Camcorder, It will only video for 2 minutes.
It depends on the camera.
The iphone 3gs has a 3.2MP camera (with video capability).
If you're lucky you may get 30 seconds out of it. If you do not have at least a 2 gb card you should not rely on it to shoot any video at all.
the screen resolution, the number of colors and the enhancements to color information.
29 mints approx in hd
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In uncompressed raw format, a 16-megapixel image will take 64 MB (4 bytes per pixel, including the alpha channel), at which rate an 8 GB card will hold about 120 images. However, if your camera stores the images in JPEG or some other compressed format, the card will hold far more images.
The screen resolution(in pixels), the number of colors, and the enhancements to the color information affect how much video RAM is needed for a video card. Pg 389 of A+ Guide to managing your pc, 6th edition.
1GB holds about 1.5hours of video at 7 mega pixs so about 6hours