Video quality

Jenya · Post by **Jenya** » Tue Aug 12, 2008 2:00 am

I'm very confused. I've doing my best to read all the guides, but I'm having a heck of a time makes heads or tails of a lot of things. I'm using video game footage, btw.

Like, I don't understand the difference between Virtualdub and AVisynth. It's seems to me they're both used for video cleaning, so why do you need both? How do you know what resolution to use when rescaling the videos for editing. And for the final product, for that matter?

The Origonal Head Hunter · Post by **The Origonal Head Hunter** » Tue Aug 12, 2008 2:06 am

VDubMod is mainly a compressing/decompressing program, avs is a filtering program. You use both because they serve different functions. You can put an avs script into VDM and see what your filtering does to the video itself as well.

Someone correct me if I'm wrong.

LivingFlame · Post by **LivingFlame** » Tue Aug 12, 2008 4:31 pm

Yea, that's pretty much right. Vdub just gives you a visual representation of the .avs file and then let's you convert it after you're done filtering. And the resolution just depends on the Aspect Ratio of your footage.

Phantasmagoriat · Post by **Phantasmagoriat** » Wed Aug 13, 2008 12:51 am

-vdub is a program that interprets and displays the footage that you feed it,
-it can also convert that video to other formats [via whatever codecs you have on your computer]
-normally, vdub is fed the video directly from the file containing the footage [aka your Source]
-However, Avisynth can act as a "middle-man" between your source and vdub
--it can take the source footage, and alter things like height/width/framerate/colourspace... even clean the footage via various filters... Then feed the altered footage to vdub for conversion/recompression.

more info here esp "Getting Avisynth to do its thing."

and if you are trying to put some logical order to the guides,
the Overview from the beta guide might help.
IMO, this is the greatest addition in the new guide...

Jenya · Post by **Jenya** » Wed Aug 13, 2008 4:15 am

I've been reading that, but the problem is a lot of it as this point seems moot since I'm using game footage, so the order of things gets screwed up. And Quu's quide doesn't even seem to mention Avisynth, so I don't know if his guide is right or the general all purpose one applies.

Phantasmagoriat · Post by **Phantasmagoriat** » Wed Aug 13, 2008 10:58 am

ok, I guess it depends on the format of your source, and I've never used game footage before. But if it's possible to get the footage into vdub, then you should be able to follow the guide as if it was a regular source. I'll just take a shot in the dark and suggest loading the video into vdub through an .avs script that looks like this:
DirectShowSource("C:\path\file.xxx", audio=false, fps=23.976, convertFPS=true)

...but yeah, I guess it depends on how the footage is ripped, and
what format it's in, which might need a different method.
maybe check the threads in the Capturing and Ripping forum too
hope this helps^^