Chroma Key simple works only the first 2 seconds

Bug
1

What is your operating system?
Win 10

What is your Shotcut version (see Help > About Shotcut)?
23.05.14

Can you repeat the problem? If so, what are the steps?
Chroma key, used for green screen, work only for 2 seconds, then the mask disappear and show the green…

I’ve used the filter some years ago. Now it works bad on same video
Can you check?

shotcut1
shotcut11608×955 125 KB

2

SC v23.06.14 can you try on

3

I’ve tried. Same bad results…

At the beginning it’s a chroma key, then it’s full green…

shot1
shot11919×994 177 KB

shot2
shot21904×985 165 KB

4

I thought maybe it was due to the version… More advanced users will help.

5

Not a bug. You do not have anything to blend with after 2 seconds. Before the two seconds there was a video. What do you want to see in the transparent areas after 2 seconds? You need to put that in on a lower track.

1 Like
6

The reason why Chroma key seems to stops working after 2 seconds is because the timeline under your greenscreen clip becomes empty.

2 Likes
7

I thought a black background, but it’s my fault. Now it is working