Frame Image Scaling in Adobe CS6 (e.g. Premiere-to-AME CUDA Works Best; HD-to-SD Requires Top&Bottom-Crops)

Frame image Scaling in Adobe CS6

  • I think I read on various webpages that downscaling and encoding within Encore should be avoided.
  • http://forums.adobe.com/message/4018118
    • CS6 CUDA-Based Scaling is Sophisticated/High-Quality:
      • Adobe Media Player in CS6 has sophisticated CUDA-based scaling algorithms that go beyond its non-CUDA-based ones.
      • They are so good that they are said to be broadly equivalent to AviSynth-HD2SD
      • But the CUDA-based algorithms only come into play when AME is encoding direct from a Premiere project (regardless of whether that project is open).
      • They do not happen when encoding either a plain media (e.g. video) file or an After Effects (AE) Composition (Comp).
    • HD to SD Conversion:
      • HD frame (hence sensor and screen) aspect (ratio) is squarer than PAL-SD-Wide.
      • Hence to avoid distortion, one can either:
        • Crop the HD top and bottom (the most pragmatic solution, but then bear in mind effects on “Safe” regions)
        • “Pillarbox” the HD within the SD frame, i.e. pad the HD image’s left and right margins, typically with black.

 

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