It's hard to say directly, but if you look at the limitations shown in the above link you'll see that the trial version of PD14 does not include any codecs for H.264 (which includes MPEG-4), so it's using whatever codecs are already installed on your system.
I can't say if those are optimized for the format you chose or if you'll see better results in the full version. Your graphics driver and system hardware are also factors, and the only way to know for sure is to buy the full version from Cyberlink and test it out.
They have a 30 day money back guarantee, so if you're not happy with the performance you'd be able to return the product. You can also check for any specific issues you have here on the forum, and we'd be happy to help make sure everything's running correctly if you still see slower producing times.
YouTube/optodata
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