Hardware platform:

  • CPU: Intel Core2 Quad Q6600 (2.4Ghz/4 cores)
  • GPU: nVidia GTX 275 (896M/448bit/240 SP)
  • Memory: 4GB

Software platform:

  • OS: Windows XP x64
  • Transcoder: MediaCoder 0.7.1.4475
  • x264 command line options:  –no-psnr –no-ssim –keyint 250 –min-keyint 25 –me hex –merange 16    –non-deterministic –aq-mode 1 –aq-strength 1.0 –b-adapt 1 –ref 1 –subme 6 –psy-rd 1:0 –bframes 3  –trellis 1 –weightb –direct auto –bitrate $(VideoBitrate) –qcomp 0.6  -o “$(DestFile)”

Test 1:

  • Input: H.264/9Mbps/1920×800/23.97fps
  • Output: H.264/2Mbps/1920×800/23.97fps
  • Content duration: 60 seconds
  • Results:
    • x264: 57.4s/25.05fps/1.04x
    • CUDA: 23.5s/61.19fps/2.55x

Test 2:

  • Input: MPEG-2/5Mbps/720×480/29.97fps/Interlaced
  • Output: H.264/1Mbps/720×480/29.97fps/Progressive
  • Content duration: 60 seconds
  • Results:
    • x264: 19.5s/92.48fps/3.08x
    • CUDA: 6.3s/284.29fps/9.48x

Test 3:

  • Input: WMV/600Kbps/352×240/25fps
  • Output: H.264/500Kbps/352×240/25fps
  • Content duration: 60 seconds
  • Results:
    • x264: 5s/299.10fps/11.96x
    • CUDA: 2.9s/510.55fps/20.42x