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Additive Dissolve disappears when rendered - multitrack video

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Maxim Drygin
Additive Dissolve disappears when rendered - multitrack video
on Mar 27, 2012 at 11:53:37 am

Surfing Google and Creative Cow in desperate attempts to solve an additive dissolve problem that I am stuck with, no luck as yet - hope anyone has the answer?

2 video tracks, the shot of the upper one starts with start-on 4 frames additive dissolve which blends perfectly with the shot of the below track that started earlier - only while previewing!

When rendered or exported as QT movie, the previously nice looking additive dissolve turns into a simple cross dissolve with no signs of the additive flash with overexposed highlights that I was keen on achieving.

Problem is solved when I put both pieces onto the same track and add an additive dissolve in between the two shots - but I can't believe everyone in the world cuts the material with additive dissolves using one track sequential approach only, no multitracking?

Appreciate any input on this, ladies and gents.


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Jerry Hofmann
Re: Additive Dissolve disappears when rendered - multitrack video
on Mar 27, 2012 at 6:21:16 pm

Maxim, what you can't imagine is what more editors than not do... I do it that way always, and use the effects editor to adjust rather than slip slide video around...

Probably a bug in the way your setting it up with two tracks... should have worked, but doesn't. At least you've a work around.


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Maxim Drygin
Re: Additive Dissolve disappears when rendered - multitrack video
on Apr 5, 2012 at 8:58:27 am

Hi Jerry,

Thanks for the response though not clear what you meant by ' is what more editors than not do'.

Any other ideas, anyone?

Just to repeat briefly:
- have multiple tracks with v1 main and several v2, 3, 4, with very short cutaways each starting with 4 frames additive dissolve
- preview looks neat with overexposed flashes when any of the v2 etc blends into v1.
- when rendered or exported, additive disappears revealing only weak and short cross dissolve which is not what I was after

Question: do I always have to have the additive dissolve of two shots on the same video track? Or it is a bug with fcp7.0.3, and everyone else enjoys adding additive dissolve to multiple tracks above the one being cut away - but me?

Thanks in advance


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