Sequence loses its alpha channel during Video Transition

[hallo218445024dao]

Hello,

I have a problem that my clip has no transparency during a video transition.

I have two clips ("TMT" & "1177193") (in V2+) and a sequence "underneath" (in V1).

Both clips are connected by a video transition.

You can see the sequence in V1 because the clips "on top" (V2+) has an alpha channel which makes the background tranparence (see at the left picture). If I put a transition like "Dip To White" or any Video transitions, the sections with alpha channel turn into black and lose its transparency (look at the right picture).

The background should suppose to be like in the bottom left corner on each frame.

I found some similar problems and I should "toggle off Transparency Grid"

but it's already uncheck.

Hopefully someone can solve my problem.

It doesn't happened in the past.

Sincerely.

[Ann Bens]

Post a screenshot of the timeline  from top to bottom so we can properly see what is going on.

[hallo218445024dao]

Sure!

I think I put the screenshot in the preview at the bottom of my post.

I didn't know you can put images inside the post.

To describe the situation:

I have two Video tracks, V1 and V2. (ignore V3-5 because of censoreship).

V1 is the background and shows a video.

V2 has two clips. The left clip (TMT.avi) has an Alpha Channel and make the background transparent.

That's why you can see the video from V1 in the background of V2 (see the orange arrow on the left side).

When it's in a video transition like "Dip To White", the transparency is gone and turns black (see the orange arrow on the right side.)

The red arrows show the frame and that is it taken before the transition (left red arrow) and within the transition (right red arrow).

I rendered the video, like Peru Bob said

but it didn't changed. And if I export it, the tranparency will be still lost.

[Peru Bob]

Try pressing Enter to render the timeline and turn the red line above the timeline to green.

[hallo218445024dao]

I rendered the video (timeline from red -> green)

but it didn't changed. And if I export it, the tranparency will be still lost.

I put a screenshot in Ann Bens's answer.

[Peru Bob]

Try nesting the track with the transition.

[hallo218445024dao]

Hey Peru,

sorry for the late answer.

I tried to nest it and it worked at first glance.

But when I export the video, the same result will come: no alpha/transparency.

It's not the first time I tried to mask the scenes first and put a transition on both masked clips

and the same result appeared.

At the time I wasn't answering I found some ideas to "work around" it where I created my own transitions.

Put both clips on different layer and let one fade away (Opacity 100 -> 0) and the other in reverse with a white background.

Not the finest solution and doesn't solve the problem, but the result is acceptable.

Still, I'm curious how I would solve my problem.

[Ann Bens]

It's difficult to help out if one does not have access to the actually timeline and its assets to test.

[Kevin-Monahan]

Hello Hallo,

Sorry about that. Likely, it's a render order issue solved probably by nesting. Transition should be inside the nest, perhaps. As Ann said, we'd need the project file to see what's going on there.

Cheers,
Kevin