(*) thanks. assume, i know, where's the bug.
(*) there s an io-exception. are they used/opened in an app in background? it seems, it couldnt erase/rewrite them. fi with premiere?
(*) will look, if i can optimize, but yes, chromasmoothing slows down the conversion massivelly. before that, there only have been bit-shiftings and multiplications of values..
regards chmee