This is a bug that I also observed on previous versions of Shotcut, but could never find out exactly what triggered it. Until today.
Doing these steps will trigger the bug almost every time:
From an already running project, go to File and click on New
When prompted to Save the project, choose No
Go to Open Other… and create a black Color clip.
When prompted, choose Add to Timeline
Go to Open Other… again and create a white Color clip.
When prompted, choose Add to Timeline
Extend the duration of the black clip on track V1.
Click on the black clip
The red border on the white clip disappears, but doesn’t appear on the black clip.
And it’s now impossible to select either clips.
Or to be more exact, I think the clip gets selected, but the red border isn’t displayed.
Clicking on one of the track headers will work though.
If I drag the color clips in the timeline instead of using Add to Timeline everything works fine.
I was going to mention it as a workaround since I think it worked in some occasions in the past. But it didn’t work when I captured the video above. So I did not include that part.
Well, no. That simply means that the red borders still work on the track header. But click-selecting a header doesn’t restaure the red borders on the clips. Sorry for the confusion.
The only workaround I found so far is to close/re-launch Shotcut.
Today I tried to reproduce this issue with the latest version. But I am not able to cause the problem. @MusicalBox, can you test it again? Maybe I am not following the steps correctly.
I just tested on v24.11.17
Same issue as above, except it turns out I don’t need to extend the black clip.
So here are the steps now:
From an already running project, go to File and click on New
When prompted to Save the project, choose No
In the new project, go to Open Other… and create a black Color clip.
When prompted, choose Add to Timeline
Go to Open Other… again and create a white Color clip.
When prompted, choose Add to Timeline
Since the white clip (track V2) was the last one added, it is selected.
If I click on the black clip (V1) both clips get unselected and neither can be selected again.
If I drag the clips manually in the Timeline instead of using the Add to Timeline option, the clip selection works as it should.
Sorry if this looks like a duplicate of my original post, but I see no other way of explaning the problem.