Sudden resolution change when recording HDTV

[Strawson]

Hi I was recording an HD 1080 TV programme via WinXP CAPDVHS method. The recording went well and the file is playable using VLC & MPC. But because I set the recording 30 seconds before the programme starts, the resolution changes from the 720 resolution programme to the 1080 programme so basically the mpc window expands to 1080 when the programme i intended to record starts.

I tried to cut the video using videoredo but an error occurs : "TN Video Thread: Video Dimensions changed."

Is there any way else that I can edit this file without error? How?

Thanks in advance