HD2SD – A “Package” for AviSynth

HD2SD is an HD to SD convertor implemented by Dan Isaac as an AviSynth”package” (my term, for the plugin of that name and its dependent bits).

Its development was apparently prompted by the relatively poor scaling performances of NLEs at that time (e.g. Adobe CS4).  Some claim that it is still superior, even to Adobe CS6’s latest CUDA-based scaling algorithms, though those run a close second.  In my own experience to date, of converting a 1440×1080 HDV footage to 720×576 PAL-SD-Wide equivalent, the results were poorer than SOny Vegas 10’s “Best” (Bicubic) scaling algorithm.  Regardless, there is always the possibility of error in such experiments, and in any case, its “place in history” and potential for use in future remain.



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