I'm assuming these are the Vegas crossfade curves mentioned

@johny_lovin_it

Hi,

Here are the Flexible Crossfade Options in MEP/VPX:

For Exponential and Sigma, use the slider to get the curves that you want. Very flexible.

For anything more, you should get Pixelan DissolveMaster or SpiceMaster Pro where you can define the curves any way that you want and control the look of the fade.

@Former user

Interesting curves in Vegas. There are some where the inverse of the curves don't match. I don't know how that would look in practice.

John CB

@browj2 I'm not sure what you mean, on short crossfades it's not noticeable, as in your pic the fade can be added to the start or/& end of a clip, there's only the 5 options with their poss combinations. on longer crossfades how fast one image dissaprears & how long the next takes to come can be noticed,

Most/all added transitions have a Fade toggle that can be keyframed, that keyframe can be made as a Bezier

@browj2

Hi John

. . . . There are some where the inverse of the curves don't match. I don't know how that would look in practice. . . . .

The Vegas transitions are similar to what you would get using Levels effect adjusting the Input start/end and Output start/end as shown below

HTH

John EB

@johnebaker

Hi John EB,

Thanks for that. I have not mastered the Levels effect and just played around a bit with now.

To be used for a transition, one would have to use Alpha and not All for the Channel. Thus with videos on tracks 2 and 3 and a background on track 1, Levels can be applied to the videos on tracks 2 and 3. Anywhere that the sum of the two does not add up to 100, then there would be transparency and you would see track 1. Correct?

Thus for @Former user, in your Vegas curves, that is what I meant. At any point along the curves, if they are not the exact inverse, you get a darker or lighter result of the sum effect, would you not? If there is a background object on the lower track, it would show through. This is how transitions with a background are made, if I understand correctly.

So, using Levels in VPX with Alpha channel will get you the background, depending on the parameters. I presume that using the Vegas template curves that are not complementary would show the background. Is this correct?

By complementary, I mean that at any point, the sum of the parameters is 100%. So 5+95, 10+90, 20+80, etc.

As an example, take a template with a curve and a straight line. At the midpoint, you would get 50% transparency on one clip, but maybe 20% on the other, so you get a total of 70%. You would then see a background clip in the 30% or it would be darker, the default background being black.

Here is an example in VPX using Video Levels under Chromakey. Track 2 is 50%, Track 3 is 20% so you can barely see it, and you see track 1 at the missing 30% level.

Here is with both at 30%:

As John EB and I have shown, these can be keyframed in VPX with Bézier curves to get almost any desired effect.

@johny_lovin_it

Is this enough to convince you that what you actually have far exceeds what you thought?

John CB

@browj2 Yes, on the crossfade transitions when the two curves make a low point in the middle like a U the track below will show, if no track it'll almost appear as fade through black, if there is a track/object below that will show, yep the curve basically indicates the Video level as you show

Just to add info, Adjustment tracks can be added to a track or a few tracks if they're connected Parent-Child like, the Adjustment track can Composite level (Video Level), Mute or have any fx added & the level controlled as to how much it effects the child track below, the nodes added aren't Bezier but can be set to different curves (Linear fade is the straight sloping one at the top)