#24 HowTo basics

[Anonymous]

Hi - I'm sorry to be an absolute n00b on this, but I can't
figure out how to use ffdshow to do >anything<.

I've run the install everything seems fine,
a "configuration" screen is available in my start menu
and I do have various players (including BS Player,
which supposedly should work with ffdshow).

Now what do I do to actually use it? I've run movies in
BS Player and the ffdshow config screen didn't show the
movie details - changing post-processing settings
obviously didn't affect the movie playback.

I'm sure I'm missing something fundamental... what is it?

[BlindWanderer]

Logged In: YES
user_id=667699

the post-processing featurs do actualy do things (has to be
enabled. But the really beauty of ffdshow is sharpening,
resizing, and color ajustment. if a video is to dark you can
make it lighter by ajusting the Gamma.

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Level & Picture Properties Tabs

take histogram in the levels dialog.
Gamma changes the shape by unequaly streching the shape
depending which whay it is streched.
Levels changes the start and end point of the shape of the
histogram.
Luminance Gain is like a multipler that effects how white
white is or how black black is.
Luminance Offset is a shift to the the brightness of the
picture. So gray can become white and black becomes gray.
Or white becomes gray and gray becomes black.

Luminance Gain and Offset can be used to do the same
thing as Level

Hue is hard to explain. play with it on your TV to see what it
does...
Saturation effects how intense colors are.

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Offset Tab

in some video you may notice that the color for an area
seems to have crossed over it's boarders. Like with subtitles.

The Luma is the picture itself
this can be moved in single pixle incroments in all
colorspaces.

Chroma in only RGB colorspaces can be moved in single
incroments. otherwise you have to move it in incroments of 2.
RGB is not a proffered colorspace....
if you need to move the chroma like 1 pixle move the luma in
the oposite direction that one pixle...

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Blue & Noise Reduction Tab

Temporal smooth does smothing accross frames so that it
removes noise by averaging the frames against each other.
if you turn this up to high you will see trails. or motion blur.

I don't know how the others work.

--------------------
i don't know much about sharpening.
DCT i know nothing
Visualizations are fun to play with but don't work in RAW
mode.

if you have DScaler install you can use it's filters.
if you know how to make avisynth scripts you can use that
feature.

Perspective correction alows you to stretch a video in
interesting ways. so if you took a video of a tv you could take
the screen and do some stretching to make that square even
if you were not right in front of it.