Re: [Avid-L2] Flipping the fields, that old chestnut

Since the matte key trick was mine, let me explain:
Put your interlace clip on an empty timeline, drag the Matte key on it.
(both Pal and NTSC can be found here: www.editb.nl/fielddominancechange )

make a subclip from that, and forget about the timeline.

Now, if you want to change field dominance of a clip:
Edit it on V1
Edit a copy on V2 (or copy, drag to other track, paste), give it one frame
offset. (Lasso into trim mode, offset either direction, or just shift...)
Edit the interlace/Matte key subclip over the duration of your field
dominance problem clips on V3

Done, and RT.

Hassle? A bit. But way faster than any other option.
(and yes, it should be simple to re-write the Matte plugin to carry this
trick...)

Bouke

VideoToolShed
van Oldenbarneveltstraat 33
6512 AS NIJMEGEN
The Netherlands
+31 24 3553311
www.videotoolshed.com
For large files:
http://dropbox.yousendit.com/BoukeVahl998172

----- Original Message -----
From: "shieldsy72" <PaulShieldsAvidL@gmail.com>
To: <Avid-L2@yahoogroups.com>
Sent: Monday, March 01, 2010 1:08 PM
Subject: [Avid-L2] Flipping the fields, that old chestnut

I've seen many ask over the years whether Avid can reverse the field
dominance of a clip. As we know, it can't. Usually you're best off just
reimporting the file with the setting reversed (if you know what it was set
to in the first place) but in the case of material where that's not
practical (like the imports would take an eon to do again) we've been
experimenting with alternatives.

We've tried the technique of keying through an offset frame using a matte of
odd or even lines. This works but is quite cumbersome to apply to every
shot. So I had a bright idea which didn't work when tried - I'd appreciate
some extra brains to at least tell me why!

If I drag a Scratch Removal effect onto the clip (not click the button which
adds two edits but put the effect on the whole clip), then draw a shape
covering the whole image and set it to "relative", offset to 1 and not work
in frame mode, surely that should offset all the fields by 1 and reverse the
dominance. It didn't seem to work when we tried it. Any thoughts?

Cheers!

Paul

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