For those who have reasons to get into codec packs, I recommend shark007 and Windows preferred directshow filter tweaker tool. Easiest way to get everything working in MC7 x64 for instance. Recent versions seem to have iffy issues with Haali I think.
But before this got steered away, the inquiry was abou x264, which is an ENCODING tool and NOT a codec. It is the most robust and efficient AVC encoder out there, hands down.
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