If you look in "Preferences", in the "capture" tab, you can set the capture to split the video files. This only works for DV, not HDV.
Are using HDV? I have a DV7t-3000, running W7x64. I cannot capture HDV at all. I have to use XP on another computer.
Check your PM, I have sent you a link to the DV7t forum.
HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT