Our DivX test is the same DivX / XMpeg 5.03 test we've run for the past few years now, the 1080p source file is encoded using the unconstrained DivX profile, quality/performance is set balanced at 5 and enhanced multithreading is enabled:

Four cores and you're good to go with video encoding. The Athlon II X4s are faster than the Q8200 and even the Phenom II X3 720. Intel doesn't have anything that offers better performance at $99 from a video encoding standpoint.
Graysky's x264 HD test uses the publicly available x264 codec (open source implementation of H.264) to encode a 4Mbps 720p MPEG-2 source. The focus here is on quality rather than speed, thus the benchmark uses a 2-pass encode and reports the average frame rate in each pass.

The Athlon II X4 continues to beat up on more expensive chips. The Q8200 and the E7500 don't stand a chance. Only the Phenom II X4 and Core i5 are faster.

The Core 2 Quad Q8200 is only able to match the Athlon II X4 620 in performance here. While I'm used to writing that AMD needs to adjust prices downward, here the pressure falls on Intel.
In order to be codec agnostic we've got a Windows Media Encoder benchmark looking at the same sort of thing we've been doing in the DivX and x264 tests, but using WME instead.

The Athlon II X4s round up our video encoding tests in the lead. At $99 you can't buy a better quad-core processor, or even dual-core for that matter if you're going to be encoding video.
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