http://www.afterdawn.com/guides/arch...th_imgburn.cfm
Read the info before buying a blank dvd.
DVD-5 (12cm, SS/SL): 4.38 GB (4.7 G) of data, over 2 hours of video
DVD-9(12cm, SS/DL): 7.95 GB (8.5 G), about 4 hours
DVD-10 (12cm, DS/SL): 8.75 GB (9.4 G), about 4.5 hours
DVD-18 (12cm, DS/DL): 15.90 GB (17 G), over 8 hours
DVD-1? (8cm, SS/SL): 1.36 (1.4 G), about half an hour
DVD-2? (8cm, SS/DL): 2.48 GB (2.7 G), about 1.3 hours
DVD-3? (8cm, DS/SL): 2.72 GB (2.9 G), about 1.4 hours
DVD-4? (8cm, DS/DL): 4.95 GB (5.3 G), about 2.5 hours
DVD-R (12cm, SS/SL): 3.68 GB (3.95 G)
DVD-R (12cm, DS/SL): 7.38 GB (7.9 G)
DVD-R (8cm, SS/SL): 1.15 GB (1.23 G)
DVD-R (8cm, DS/SL): 2.29 GB (2.46 G)
DVD-RAM (12cm, SS/SL): 2.40 GB (2.58 G)
DVD-RAM (12cm, DS/SL): 4.80 GB (5.16 G)