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Messing around with ffdshow, and some results

 
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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY


PostLink    Posted: Thu Aug 21, 2008 6:01 pm    Post subject: Messing around with ffdshow, and some results Reply with quote


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I've been playing with FFDShow and avisynth in my HT, trying to get some good DVD upscaling going on. Haven't moved to bluray yet, and not a lot is really out on BD anyway.

I'm super CPU-limited (Pentium D 2.6ghz, dual core) but I can do a bit.

There's a filter for Avisynth (a scripted processing language which can run inside ffdshow) that does a 'limited sharpen' which performs sharpening without ringing or EE artifacts of note. It uses massive CPU, though, and there's no way I can run it on an upscaled 1440x960 image. But I'm gradually coming up with some stuff that might work. I haven't tested this for smoothness yet, but it's kind of interesting as it's an unorthodox chain of filters that seems to have a reasonable result. To wit:



Interesting, eh? Certainly not perfect, but what's interesting is that doing the initial upscale to 1440x480 isn't much different than to 1440x960. The final upscale and unsharp mask help eliminate any residual oddness from the lack of vertical upscaling. You end up with some graininess, but given the atrocious quality of DVD to begin with, I actually prefer some grain rather than having a big, blurry blobiness.

With any luck it won't stutter on my machine... I'll try to get some screenshots if it works out.

Is anybody else around here using ffdshow, and if so, what settings?

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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY


PostLink    Posted: Thu Aug 21, 2008 6:22 pm    Post subject: Reply with quote

Another quick shot:

(All of these are raw -literal- screenshots of ZoomPlayer.)


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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY


PostLink    Posted: Thu Aug 21, 2008 6:34 pm    Post subject: Reply with quote



These are 1:1, cropped, by the way.

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