Is your radeon really just PCI (as opposed to AGP)? There is a performance problem with using dScaler with PCI graphics cards.
In any event, if you want to use dScaler you will need an inexpensive TV card, preferably with s-video input. dScaler can work with a Radeon card as a graphics card but cannont read video input from a Radeon AIW card if that is what you have.
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