I've heard a few times now that only pro gear can do proper chroma keying and that there is no point in even trying with consumer gear. Is this really true? I'm filming with a consumer grade camera, it's actually a DSLR with video function, a Casio EX-F1. It shoots nice HD video in AVC/H.264 or if it's considered AVCHD, not sure which. Could I do some chromakeying of ok quality or should I not even consider trying it?