Log Message:
Update to 1.2.1:

New in 1.2.1:
   * Fix for 'nested function' potential compilation error

New in 1.2.0:
   * Complete AMD64/EM64T 64-bit support
   * Added support for WIN64 platform
   * Multi-threaded encoding support
   * SSE3/SSE4 optimizations
   * Faster and more precise mpeg intra quantization
   * Fixed bug in packed pixel format colorspace conversion
   * Noexec-stack security patch
   * Fix for bad resync marker length
   * Improved decoder robustness for broken streams containing B-frames
   * Fix for potential out-of-bound access to MV bits table
   * Added SSIM quality-metric plugin