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Old 9th January 2015, 04:26   #13  |  Link
foxyshadis
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Join Date: Nov 2004
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I think you're thrashing the cache, that would explain why speed drops considerably: You have no room left to store processed old frames, but another filter wants them anyway, so Avisynth has to rerun QTGMC to recreate them. The more temporal filters you have, the more cache thrashing you get, as the radius of frames that need to be touched expands. Since you're hitting the 2GB barrier anyway, just raising the cache size will only lead to out-of-memory crashes.

If you stay in 32-bit mode you only have one good choice: chain multiple avisynth scripts in series, so each gets its own 2GB slice of memory. If you can find 64-bit of everything you need (or switch to Vapoursynth), you can alleviate that problem, as long as you have enough memory.
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