Video recording is very large to use Kdenlive:
1 minute video size of about 220 ~ 350M, 1 hour size over 20G...
Video size for me is too big.

I do not need such a high quality, my highest request is DVD (4.7G) video quality, I want to record the video size can be smaller, 1 hour video is smaller than 2G.
How to set? Please help me.

Sorry, bad English

This is the nature of DV that comes from your camcorder. It is only compressed about 5:1. dvgrab is a data transfer application; it receives DV from your camera via FireWire and saves it to a file. There are no "video capture" settings like you might be familiar with when capturing from analog video through a capture card. If you do not like that size, you must transcode it to something more compressed and then delete the original; however, I do not recommend that because you will lose quite a bit of quality. DV is a very reliable and easy format to work with in an editor.