1. Make sure you have installed AVISynth plugin when you install ffdshow. Look for "ffavisynth.dll" in the AVISynth plugin directory.
2. Under "Image Settings" of "Video decoder configuration" of ffdshow, add a new preset "5-Tape-Deint", which enables the 5-tape deinterface filter only.
3. At the start of your AVS script, add loadcplugin("ffavisynth.dll")
4. Then at the appropriate place, add ffdshow(preset="5-Tape-Deint")

謝謝您的指教

使用了 AVISynth v2.5 和 ffdshow version Sep 23 2006 ，得到回應 "ffavisynth.dll" 不是 AVISynth 2 C Plugin

若使用了 AVISynth v2 得到回應 "ffavisynth.dll" 不是 AVISynth 1.0 Plugin

ffdshow 我試過上一版 version Aug 28 2006 的，結果一樣，這樣是哪裡出錯了呢？

loadcplugin("ffavisynth.dll")改為
loadplugin("ffavisynth.dll")試試看

有試過，仍舊得到版本不對的回應

Sorry, I gave a bad example.

You must specify full path name when you use loadcplugin().

有試過，仍舊得到版本不對的回應

I am using AVISynth 2.5.7 rc1
http://www.free-codecs.com/AviSynth_download.htm

and FFDShow Tryout-248 clsid icl91 compile
http://prdownloads.sourceforge.net/..._clsid_icl9.exe

No error for the following AVS script:
-------------------------------------------------------------------
loadcplugin("C:\Apps\AviSynth257rc1\plugins\ffavisynth.dll")

green=Blankclip(pixel_type="yuy2",color=$800000,length=100,width=640,height=240,fps=15,audio_rate=8000).killaudio()
violet=Blankclip(pixel_type="yuy2",color=$80FFFF,length=100,width=640,height=240,fps=15,audio_rate=8000).killaudio()
interleave(green,violet)
assumefieldbased()
weave()
converttoyv12(interlaced=true)

ffdshow(preset="5-tap-lowpass")
-------------------------------------------------------------------

這兩個版本可行，看來以後要常常注意版本了。