Jef,
2 is correct. The viewer is what scales. If you want to work in an
anamorphic SD 16:9 project in DS but view the result on your broadcast
monitor, most newer monitors have a setting which squeezes the 4:3 input
to the proper 16:9 aspect. Anamorphic widescreen in video is the same
principal as 35mm motion pictures produced in wide-screen format: the
frame on the film is still 4:3, but the lens with which the film was
shot squeezes the image into the frame, and the lens with which it's
projected expands the image back out onto the screen.
____________________________
John Heiser
Avid DS Editor
o2ideas
Birmingham, Alabama, USA
-----Original Message-----
From: owner-ds(at)Softimage.COM [mailto:owner-ds(at)Softimage.COM] On Behalf
Of Jef Huey
Sent: Wednesday, December 21, 2005 10:46 AM
To: DS(at)Softimage.COM
Subject: Re: 16x9 project questions
Hi Andi,
Ok, so the way I read you response (thanks by the way) it could be
interperted two ways.
1. The pixels are scaled on capture and again on output. Since on
tape there is no difference between a 16x9 pixel and a 4x3 pixel.
or
2. Pixel scaling is only inside the DS for viewing purposes. I would
lean towards this since the broadcast monitor is representing what will
go to tape.
Is 2 more to your understanding?
Jef
Andi Loor wrote:
> Hi Jef,
> It is a matter of pixel size. The 16/9 pixels differ from the 4/3
> pixels in that they are wider. There is the same amount of pixels but
> since the 16/9 pixels are wider the image becomes wider. Actually the
> 16/9 recording to tape is performed with a sqeeze of the image onto
> the same amount and width pixels as during 4/3 recording and during
> playback they are stretched to allow the image to look normal. When
> working with 4/3 or 16/9 settings in DS the viewing area is adjusted
> to show wider/stretched pixels or normal/non stretched pixels. There
> is also metadata written with the clip so that DS will know how the
> image originally was captured. Hope this clears some of your questions
> Andi
>
>
> Jef Huey wrote:
>
>> I have been experimenting with DSs SD 16x9 versus 4x3 project
>> settings. I am trying to understand what is happening "under the
hood".
>>
>> Since on tape, a digibeta ONLY records 720x486 pixels, I am making my
>> first assumption that DS is also doing the same. IE, that whether or
>> not you choose 4x3 or 16x9, there are only 720x486 pixels captured.
>> Is this true?
>>
>> Beyond that, what is different between the two project setups. In a
>> 16x9 project, I can see that in the viewing monitors on the
>> workstation output that the image is a correct 16x9 (not
>> anamorphic). Fine. What about generated text? Is the aspect ratio
>> been correct when I generate new text? What happens when I bring in
>> a graphics effect from a 4x3 to a 16x9 project?
>>
>> I imported some footage from a 4x3 into this test 16x9 project and DS
>> seemed to scale it. What rules are used? What Scaling method? Can
>> I change the default if I need to (I already know the answer to that,
>> just bringing it up). And what happens in the opposite direction
>> (16x9 to 4x3)?
>>
>> Is there any doc on this? I did a search in the on board help in DS
>> and found nothing. Did I look in the wrong place?
>>
>> So many questions. This is something that I would hope would be
>> covered in detail in documentation.
>>
>> Thanks for reading.
>>
>
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