Setting ffdshow's AviSynth option

[Soulvomit]

At the moment I'm trying to use AviSynth through ffdshow for YV12-to-RGB conversions but get a script error message layed over the playing video.

ConvertToYV24(interlaced=false,chromaresample="point")
MergeChroma(PointResize(width, height,0,1))
ConvertToRGB32(matrix="rec709")

Script error: Invalid arguments to function 'ConvertToYV24' (ffdshow_filter_avisynth_script, line 1)

I'm using ffdshow 1.2.4499 and AviSynth 2.6.

[clsid]

Syntax:
http://avisynth.org/mediawiki/ConvertToYV24


ffdshow provides native high quality RGB conversion. You don't need to use avisynth scripting.

[Gavino]

Script error: Invalid arguments to function 'ConvertToYV24' (ffdshow_filter_avisynth_script, line 1)
You probably forgot to tick the "Add ffdshow video source" box in the ffdshow Avisynth options.

[Soulvomit]

Sorry, I forgot to mention that with that checked (on both video and VFW configurations, might I add), there aren't any error messages but nothing is processed either. Output is YV12/NV12 and plays normally with hardware RGB conversion.