Barry Green |
January 2nd, 2010 04:48 PM |
Quote:
Originally Posted by Keith Moreau
(Post 1465372)
Has anybody seen any codec related motion artifacts at this pretty high bitrate and theoretically good codec? I haven't noticed but I haven't been looking hard.
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Understand that while the bitrate is pretty high, and the codec is theoretically good, the particular implementation of the codec is simplistic, so the overall performance isn't nearly as good as you'd expect. Not all implementations of h.264 are equivalent. There are certain features or tools that the designers can choose to use or not use. On the 5D/7D, they chose not to use B-frames, and B-frames give the codec incredible efficiency. As a net result, 50mbps of h.264 on the 5D/7D isn't nearly as robust as the 21mbps PH mode of AVCHD h.264 is.
So -- to sum it up, the codec in the 7D is pretty good, but as for codec artifacting, it's probably only about HDV caliber when all is said and done.
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