I download videos from my youtube channel to rework them in cs5. For the download I use dvdsoft youtube downloader which gives u the option to download original mp4 file and/or render it in different formats such as avi and wmv. Now, when I download those mp4 videos I do have sound in my windows media player after installing those codecs DVDVideoSoft.com: FAQ and Support - K-Lite Codec Mega Pack . But when I test the sound in my after effects with the key , then I get no sound whatsoever. I assume now that those codecs are not loaded into after effects and wonder if there is any solution to it? Can I for example just inport codecs to after effects?
Get rid of the K-Lite codec pack. You will find hundreds if not thousands of post where this product is causing problems.