How to encode x264 with 64bits version ?

Well Im using an Athlon 64 X2 4000+ with Windows XP 64 bits, megui 3.0 and avisynth 2.5.8 alpha 2 with the x264.exe 32 bits version 714 and everything is working fine no errors I can encode perfectly with the x264 32 bit version. I saw on the forums people posting results encoding with x264 64bits and the encode speed was like 10% faster with the x264 64bits soo I wanted to use it too but I dont know how to encode with the x264 64bits builds. I got the x264 x64 682 version from and tried using it but Im always getting an error on megui x264 [error]: could not open input file F:\video.avs. The only thing I did was to change the executable to the 64 bits version, with the 32 bits executable I dont get any error. Can anyone explain to me how to encode with those x264 64bits please ? :)

For 64-bit x264 to work, you need 64-bit in all steps of the chain, including Avisynth itself.

Soo I need avisynth, decoders and splitters 64bits ? Seems hard to find everything 64 bits version :p Do you know where I can find those softwares compiled in 64 bits? :)

Tried the software avs2yuv like akupenguin said and now I can encode using the x264 64 bits build :) Result using the x264 32 bits build 709 F:\x264>x264.exe --crf 18 --keyint 300 --min-keyint 30 --no-fast-pskip --bframes 3 --b-pyramid --b-rdo --bime --weightb --subme 7 --trellis 2 --analyse all --8x8dct --me umh --threads auto --thread-input --progress --no-dct-decimate --no-psnr --no-ssim --output "f:\x264\video.mkv" "f:\x264\video.avs" avis [info]: 704x400 @ 30.00 fps (3036 frames) x264 [info]: using cpu capabilities: MMX MMXEXT SSE SSE2 3DNow! x264 [info]: slice I:76 Avg QP:15.79 size: 1721000:00 x264 [info]: slice P:2303 Avg QP:15.97 size: 10166 x264 [info]: slice B:657 Avg QP:19.72 size: 4608 x264 [info]: mb I I16..4: 55.0% 42.6% 2.4% x264 [info]: mb P I16..4: 8.0% 17.2% 0.7% P16..4: 41.0% 11.7% 3.9% 0.2% 0.1% skip:17.2% x264 [info]: mb B I16..4: 0.1% 0.6% 0.1% B16..8: 30.7% 2.1% 6.9% direct: 7.1% skip:52.5% x264 [info]: 8x8 transform intra:63.9% inter:80.2% x264 [info]: kb/s:2193.5 encoded 3036 frames, 9.46 fps, 2193.65 kb/s Result using the x264 64 bits build 682 with avs2yuv F:\x264>"f:\x264\avs2yuv.exe" "f:\x264\video.avs" -raw -

Wow, I didn't realize 64bit was such a huge boost :o Can't wait for Linux AviSynth 3.0, so I can encode well in Linux... my Windows is 32, my Linux is 64.

Of course, avisynth in 64-bit will also give you a good boost if it's a limiting factor at all. squid_80 has a number of plugins available for it.