What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
To do a transition to black effect, I decided to do a cross fade with a transparent image. However, when I close the file and try produce the file next day, the transition comes up invalid. If I redo the cross fade (as in re-edit the video), the problem may or may not persist. It is really annoying and I hope it gets fixed or if there’s an alternative solution to a cross fade.
Here’s a video showing the problem and the log file. I also compliment two images used in the cross fade in case that’s relevant. The “transparent” picture is just a picture with a transparent layer.
I apologize, I forgot to include my Shotcut version. It is the most current version, 22.01.30, 64-bit Windows, even though the file was not made in this version. (I also may include that at one point, I thought the problem may be that I removed the “pure” tail of the cross fade, and it caused this problem and thought not to remove it, but I fell into the old habit of removing it and thought this ought to be fixed)
I do not know why you are making a transition with a transparent.png. That does not do anything - at least in version 22.01.30. I also tried in v21.08. Also, you should use Shotcut’s builtin color generator instead of a PNG of solid color. That way you have one less file to deal with because INVALID often shows when a file is missing and has not been replaced.
I see in your log