Since SVCD resolution is 480X480 I'll assume that you're using a ty file extracted from a DirecTivo. Depending on what your end product is intended to be (i.e. DVD, SVCD, VCD, etc.), I would first recommend breaking up your ty file into smaller segments. You can extract just the amount you want by specifying the length in chunks of the file you wish to extract or you can extract a group of FSIDs using the Get Parts option. Since you've already extracted the file you can also use TyFileSplit to cut it into several parts. In other words, I think your problem stems from trying to process a file that's just too big.
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