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Old August 11th, 2004, 04:43 PM   #1
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Lower field first

Hi there - Project properties field order is lower field first,
individual event properties say 'none progressive scan'.
Should they be reset to lower field first or vice versa?

Or does it even matter?
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Old August 12th, 2004, 03:44 AM   #2
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Yes it does matter. But it depends on how you recorded your
footage and with which camera. The Canon XL1S has a progressive
mode and so do other camera's like the DVX100. Depending on
that you either choose progressive for everything or lower field
first for everything (interlaced).
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Old August 12th, 2004, 06:54 AM   #3
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ahh...so much to learn, XL1S, I don't believe it's set for progressive though.
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Old August 12th, 2004, 01:52 PM   #4
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Does it matter between Lower Field First or Upper Field first?
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Old August 12th, 2004, 02:42 PM   #5
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Standard DV is lower field first. I would try LOWER before I tried anything else.
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Old August 12th, 2004, 02:46 PM   #6
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One final question, if I have interlaced video as a source, what steps do I need to take to output progressive?
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Old August 12th, 2004, 03:03 PM   #7
 
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Rob...

hate to differ with you but the XL1s Frame Mode is still interlaced scan. Just that both scans happen at the same instant in time. De-interlacing in the "interpolate fields" mode should give a very good single frame progressive.
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Old August 13th, 2004, 02:47 AM   #8
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Your welcome to differ Bill <g> I should've been a bit more carefull
when writing it down. Ofcourse it has no true progressive CCD's
so it is indeed interlace scanning CCD's, BUT WITH pixel shift.

In my opinion that always looks better than a de-interlace on the
computer (from what I've seen). It just "looks" like real progressive
although we all know it isn't in reality. So I meant to say that it
has a progressive out which isn't true progressive or something
like that.

Anyway, if you do capture in frame mode (semi progressive on the
XL1S) or true progressive on the XL2/DVX100 you set Vegas to
progressive instead of interlaced/lower field first. As I do with my
XL1S when editing footage.

Chris: what is your camera? if it has true progressive or a semi
form (only XL1(S)/GL1/2 has this) use that. Otherwise you'll have
to test and try various de-interlacing algorithms. I've never looked
at those since I always shot in frame mode.

Also there is a huge difference between lower and upper first,
stick with lower because, as Edward also states, that is the
format DV uses.
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Old August 13th, 2004, 03:43 AM   #9
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Bill, one of the properties of frame mode camera footage is that a frame (whether or not recorded as interlaced) is being composed out of two fields captured on two different slots in time. The frame mode in XL1s has the "one shot per frame" property which means that Rob is right. How they combine the pixels is not relevant for this definition.
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Old August 13th, 2004, 07:07 AM   #10
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....being composed out of two fields captured on two different slots in....
Sorry must be in one slot...
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Old August 13th, 2004, 10:55 AM   #11
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I have a GL2, I am aware of frame mode. Have not used it yet, but I thought that due to the pixel shift method used, I still had to have the workspace set up for lower first, not progressive, since it is not true progressive. It is still unclear to me...

My question related to previously shot interlaced footage though.
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Old August 13th, 2004, 11:03 AM   #12
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When shooting in frame mode you have to set your project
properties to PROGRESSIVE, NOT lower field first/interlaced.

Yes, DV is always interlaced, but that does not matter. The ONLY
difference in digital between interlaced and progressive is the
time difference between the fields. There is NO OTHER difference.

The data is stored exactly the same. Just select progressive!
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Old August 13th, 2004, 03:31 PM   #13
 
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setting to progressive is the equivalent of setting to de-interlace. if you set lower field first, you are asking for an interlaced video stream. Indeed, set it to progressive, but, also, ya should select the de-interlace method. Of the choices, I would recommend interpolate.
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Old August 14th, 2004, 07:10 AM   #14
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Why would you set de-interlace on progressive footage? That
will instruct the NLE to actually process your footage and should
yield lower resolution even with progressive since it will interpolate
your frames. Ofcourse if you actually have interlaced footage and
you want this turned into progressive de-interlace is the tool
for the job.
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Old August 14th, 2004, 09:36 AM   #15
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I'm taking all this as -- Frame Mode > use Progressive for everything, Capture and Project Properties, as well as Render
Properties. Video Mode > Lower Field First.

Yes/No ??
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