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Canon XL1S / XL1 Watchdog
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Old February 18th, 2004, 06:38 PM   #16
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It is dropframe if that's your question. All footage is stored in an
"interlaced" format (in digital on the DV tape). Frame mode truly
is 30fps (dropframe) or 25fps (PAL), only not from true progressive
CCD's.

I just checked that the original article I linked to is no longer
available. I also couldn't find it in their archive anymore.

Oh and Jeff? You should have waited one day to responding to
this. Then it would've been exactly 2 years later! <grin>
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Old February 18th, 2004, 07:17 PM   #17
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2 years?! haha. I had the question and didn't want to start a new thread.

I always assumed a few things:

- there's no need to capture video shot in frame mode any differently than you would normal DV.

- When outputing for compression (ie. to Cleaner), video shot in frame mode does not need to be deinterlaced like regular dv.

- the signal is only recorded differently in frame mode, but technically still interlaced on the tape (being NTSC).

but you're saying that it's actually electronically recorded interlaced due to the nature of the CCD's, then tweaked using pixel-shift technology and recorded at 30fps, drop-frame...

Jeff
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Old February 18th, 2004, 07:26 PM   #18
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Hey CR...punctuation is your friend.

Dude, I am exhasted from reading your last post! :)

I see you are trying to break into the film biz. Have you tried going to CineVideoTech in Miami? It is "the" rental house in Miami and would be a great place to:

A: Have the opportunity to work with all of the latest film cameras in the business, including the new ArriCam. I worked there back in the day when they still rented out BL-1s, Arri IICs and Mitchell BNCs! That is also where I took my IATSE test for AC. What a great way to gain experience!

B: Meet new people and make some great connections. There isn't a more valuable person on a camera crew than an AC that knows the camera, in and out, regardless of which one is being used, when you are on location, especially a remote one, and something goes wrong.

If you are not familiar with CVT, check out their website at : http://www.cinevideotech.com/

Click on the camera that is at the 10:00 position of the reel to see the coolest, XL-1 setup you have ever laid your eyes on!

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Good luck and remember to never let the dark leak out of your changing bag!

RB
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Old February 18th, 2004, 07:27 PM   #19
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Well no, not exactly. Let me try to get it clearer.

1) that is correct. The capture utility does not care what it is. It is merely copying a digital stream from device A (camera / deck) to device B (your computer)

2) no it doesn't indeed. If you are going to the web you don't need to de-interlace footage anyway. Output to other formats might be de-interlaced but perhaps not needed

3) recorded is not the right word here I think. It is a different acquisition process that results in full progressive frames (ie, no time difference between the two fields) which still gets stored as two fields on tape

So yes, it is electronically recorded in 60i of the CCD's. Then the
special algorithm with pixel-shift converts it to 30p (and in my
opinion this works a lot better then post de-interlacing somehow)
and then stores it as "interlaced" (ie, two fields). The difference
is that you lost some color resolution (and thus gained a bit of
softness) and the time difference between the two fields is gone.

But I think that we are basically talking about the same thing.
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Old February 18th, 2004, 08:11 PM   #20
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ok, yea that's exactly what I figured. it all makes sense now.

Regarding deinterlacing before output, it was a suggestion made in the documentation that came with Cleaner Pro. I suppose it depends what your final output is.

Thanks for clearing that up for me.

Jeff
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