First I'd like to introduce SMPDF "Lossless PDF Compressor" (its visually lossless) you can refer to more details at https://github.com/coherentgraphics/...sPDFCompressor and its "community release" at http://community.coherentpdf.com/ there is binaries for different OS.
here is a sample on SWF & FLV pdf files at
http://download.macromedia.com/f4v/v...spec_v10_1.pdf
original = 608,962 bytes
FO(8.40)= 608,962 bytes
SMPDF = 535,223 bytes
SMPDF after FO = 535,223 bytes (because FO could not reduce it).
http://wwwimages.adobe.com/www.adobe...ormat-spec.pdf
Original = 1,724,258 bytes
FO(8.40) = 1,677,408 bytes
SMPDF = 1,488,957 bytes
SMPDF after FO = 1,467,600 bytes