Question: How many minutes of video will a 1 gb sd card hold? 

Answer: well, video recorded at 8.5Mbps(UltraFine DVD 720x576 resolution) a 1GB card will hold 16 minutes worth. 5.5Mbps(Fine DVD 720x576 resolution) roughly 24 minutes. 1.5 Mbps(VHS quality 352x288 resolution) roughly 86 minutes.
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