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transitions within multicam
Editing a music video multicam clip.
Whole thing shot on a white background.
Many times I shift a clip left or right or shrink it, and layer plain white underneath so that it appears that the singer is still in front of all white.
Problem I am having is that when I dissolve between two clips the dissolve ignores the white layer below it and I get a hard line across the frame during the dissolve.
I’ve tried turning the relevant multicam clips into compound clips with their white layer underneath, but FCPX doesnt create handles to the compound clip and therefore can’t apply a transition.
anyone have any ideas?
this is a screenshot of the hard lines that happen during transitions:
and this is a screenshot of corresponding portion of the timeline:
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21 Replies
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Hello,
have you tried exporting that part as a QT? By default, FCPX preferences is set to Playback Settings – BETTER PERFORMANCE. While it goes smoother with this settings, it sometimes show strange behaviors on playbacks that aren’t really there. For example, on Better Performance, when i play back a video with a hard matter 2.35, it leaves a white line all around the black frame. If I export a QT, it’s not there and if I use the Setting Better quality, it is fine.
Give it a shot and tell me how it goes.
Dan
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hmm good idea, but i just tried it and it doesnt help at all.
i just tried creating a compound clip with handles manually, and still as soon as it hit the dissolve the edge of frame started showing despite being compounded with an all white clip.
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Ok, I had another suggestion in mind too.
Have you tried Blading the solid underneath and simply applying the transition to both, Multiclip and White solid?
It may seems like a stupid solution, but it might do the trick. -
Ok, new answer for you. Just checked it out with a colleague at work and we noticed something:
The straight cut that is over the clip, isn’t it the border of the clip your transiting too? I mean, the white background of the clip isn’t an Alpha channel, it’s solid white. You could either try masking it or doing a keying it. I believe there is a basic keying tool in FCPX, you could give that a shot. I’m pretty positive that it’s the root of your problem. -
The edge is actually the left edge of the clip I am transitioning from. I have translated the entire frame to the right leaving empty space. The white generator below is filling that space.
Is the fact I’m using generator the problem?
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The generator has nothing to do from my understanding of you project.
The edge comes from one of your clips, so it needs to be fixed on you clip. As i said, masking it or keying the white should do the trick, I see no way around, because when in transition, you have 50% opicity of eachclip, if one of them has a hard white edge, you’ll feel it on the other image. You could also just soften it by using a multi point garbage matte and using feathering. Here is a link to a quick tutorial on the 8 point garbage matte
https://www.rippletraining.com/using-the-8-point-garbage-matte-in-final-cut-pro-x.html -
Another thought along the alpha channel lines could be to play with compositing modes.
If all else fails you might try creating a custom dissolve transition in Motion that does what you need. You should be able to open the existing one in Motion and hopefully “fix” whatever is causing the issue.
Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: https://gplus.to/jeffkirkland | Twitter: @jeffkirkland -
Right I get that. I guess what I want to do is fill in that empty space at edge of frame with white. (Well that’s what I have done but it doesn’t “stick” through the dissolve.)
That’s why I was trying to compound clip it with the generator but even when I do that the line reappears.
If I mask it I am still going to have a line though it may be a fade or something, it’s still not going to match the whiteness of rest of frame, right? Or am I missing something?
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ok so i just put a thin mask around the frame, and it worked perfectly. (mask shifts with the transformation which was nice, thought i was going to have to keyframe its movement)
i have feeling this is something i should know, but does masking, cause alpha to show through in a way that simply transforming the frame to the left or right does not?
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You can easily create handles by extending your footage past the compounds in and out points, inside the compound. The process with the white background is very similar in FCP7 using a compound, and its actually the fastes way to do so for what your trying. I do it quite often for one of my industry clients whenever I get compressed crappy grafics on white.
“Always look on the bright side of life” – Monty Python
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