Using ffdshow to improve dvdrip

[crashoverride]

Is this even possible?

What I mean is I want to do a rip of dvd's that uses ffdshows filters BEFORE the encoding process to divx

So basically this:

Original DVD--->ffdshow's postprocessor filters to improve source quality-->encode to divx.

I've been searching for guides all day and can't seem to find any.

[Awatef]

You don't need ffdshow for that.
In your AviSynth script, add the cpu parameter to the MPEG2Source line.
Like if you original line looks like this:
MPEG2Source("dvdrip.d2v")
You change it to:
MPEG2Source("dvdrip.d2v", cpu=x)
Where x is a number from 0 to 6. The higher the value, the higher the post-processing level.
More details on the DGdecode manual included with DGIndex.

[crashoverride]

Is there a way I can compare a frame post processed by AviSynth before encoding the (ie Single Frame screenshot) to compare it's post processing to FFDShows capability? I know FFDShows filters make a HUGE difference in DVD quality after some tweaking and I would like to compare the two with your suggested method.

[Awatef]

I guess, the fastest way to do a comparison is to encode a small part using Huffyuv to retain original DVD quality, then compare it with the ffdshow processed version (live watching).

[Blue_MiSfit]

StackVertical(clip1,clip2)

where clip1 is the souce and clip2 is the version postprocessed with ffdshow