I have a show in two parts: one is 1150 Kbps, 29.970 fps, res. 400*256 (16:9), MPG1 = MPEG 1 (VCD) and the second part in 1150 Kbps, 29.970 fps, res. 400*256 (16:9), MPG1 = MPEG 1 (VCD). I want both to be in 4:3 and after I'll merge them so they are in one part and reencode them to fit on 1 CD (VCD). Do I have to reencode to put both in 4:3?