Re: Saving a .wmm without compression?

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Thanks for the follow-up, Rehan.  I'm happy to be
wrong in this case.  :-)

However, depending on the source material, I'm still not
convinced that DV-AVI is _always_ the best choice as
an intermediate format.

If the source material is non-interlaced, for example,
and the final production is also going to be non-interlaced,
then I think that saving to an interlaced format such
as DV-AVI may actually hurt the quality of the final
movie.

But then again, as PapaJohn said, it still might be the
best option that's "available in Movie Maker" without
using a custom profile.

Thanks again!

--
-Bob
_______________________________
Microsoft MVP
Windows XP Media Center Edition
http://www.microsoft.com/ehome


"Rehan" <someone@xxxxxxxxxxxxx> wrote in message news:urPRJDFpFHA.3916@xxxxxxxxxxxxxxxxxxxxxxx 
Hi Bob

I don't see anything that would lead you to believe that
the "blur filter" is only used for rendering still pictures,
but not video.  That doesn't even make sense to me.



I agree that the quoted statement of Dean did not make it clear whether the
filter is applied for everyhting or just the stills. However the thread in
which this statement was made was specifically for still images. Furthermore
the stills are treated differently already by assuming that these are made
up of square pixels always, while a source video is assessed for non-square
pixels as well...

Nevertheless I have asked Dean directly and received confirmation that the
filter is specific for the stills. Here is his reply to my question:


From: "Dean Rowe"
Sent: Thursday, August 18, 2005 10:59 PM
Subject: RE: DV AVI blurring filter


It is specific to still images; we don't use it on video as that would be
very bad :-)
Cheers
Dean.

-----Original Message----- 
From: Rehan
Sent: Thursday, August 18, 2005 1:48 PM
To: Dean Rowe
Subject: DV AVI blurring filter

Hi Dean

I would like to clarify something about the NTSC-safe/blurring filter
that is applied for DV AVI output in Movie maker... Is it specific for
still images or it is applied for the video as well. For video it would
be detrimental for quality !!!

See this thread in XP movie maker newsgroup:

Subject: Saving a .wmm without compression?
news:eNqf0w2oFHA.3912@xxxxxxxxxxxxxxxxxxxx


Rehan
MS MVP -- Digital Media



--
Rehan
MS MVP -- Digital Media
www.rehanfx.org - get transitions and effects for Windows Movie Maker



"Bob [MVP]" <bob@xxxxxxxxxx> wrote in message
news:OpbFSGApFHA.3656@xxxxxxxxxxxxxxxxxxxxxxx

Rehan,

Hi Bob, please note that this flaw affects only still pictures. For Video
that is captured in DV AVI, keeping it in the same format after editing
would still be best solution for quality.


This is what Dean wrote:

*************************************************************
When we save to DV-AVI we're assuming that you're ultimately
targeting playback on a regular television as opposed to a
computer monitor. Consequently when we're saving to DV-AVI we
actually put a filter in the graph that ensures all colors
are NTSC safe and it also slightly blurs the image. This is
deliberate so that the image doesn't flicker so much on a
regular TV. Of course this makes it look worse when you're
looking at the result on a computer display, which is
typically of a higher quality than a TV.
**************************************************************

  "... it also slightly blurs the image."

I don't see anything that would lead you to believe that
the "blur filter" is only used for rendering still pictures,
but not video.  That doesn't even make sense to me.

That is totally unacceptable IMHO when rendering to DV-AVI.
I have always observed that the quality of the DV-AVI that MM
creates is of (slightly) lower quality than the DV-AVI that
was rendered by my miniDV camcorder.  But I never understood
why.  Thanks to Dean's explanation, now I understand.

If you have other information that leads you to conclude
that a different filter graph is used based on the input
media, please provide it.  Otherwise, I'll stand by my
original comments.  Thanks.

--
-Bob
_______________________________
Microsoft MVP
Windows XP Media Center Edition
http://www.microsoft.com/ehome






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