Dissolve Transition not Fading

Help/How To
1

I’m new to Shotcut and I see that this issue has been posted before. However, I’m not able to even get a workaround to work.

When dragging to overlap for an automatic dissolve transition between two images, one of the images does not fade–it just pops up in full and the other fades in/out around it. Upon splitting these images to separate tracks and using Fade In/Out transitions on each track, one of the fades is ignored by Shotcut and the image simply appears like a regular cut.

I’m attaching a demo of this with 2 images on separate tracks. The second image does not fade in, but instead simply appears. This seems like a simple (and default) transition so I’d expect this to work. Any assistance would be appreciated.

2

Hi @Sean_Quallen

This happens because your two images don’t have the same aspect ratio. The black bars you see are in fact transparent areas. There is nothing to fade in these areas.
Here are 3 workarounds:

1- Give the same aspect ratio to all your images

  • In an image editor (Photoshop, Gimp, etc…), create a file the same size and ratio as your project (for example 1920x1080, 16:9) and fill it with black.
  • Import your image as a new layer above the black background.
  • Resize the image and center it.
  • Export as a new image file.
  • You end up with an image of the same size and ratio as your project, with black bars.
  • Repeat for each image.
  • The dissolve transition will work correctly with those images.

2- Add a black clip below the transition.

  • Import your original images on Track V2 and create a dissolve transition
  • Below the transition clip, on Track V1, add a black clip, at least the same length as the transition (see a demo in the video below).

3- Make the transparent areas opaque with the Crop: Rectangle filter.

  • Import your original images on Track V1 and create a dissolve transition.
  • Select the first image
  • Go to the Filters panel and add a Crop: Rectangle filter.
  • Don’t change any of the parameters. The default black Padding of the Crop filter will fill the transparent areas with black and the transition will work properly (see a demo in the video below).

Maybe there are other workarounds or solutions, but these are the 3 I know.

3

Thanks for the help @MusicalBox Both 2 and 3 seem like easy enough workarounds. I’ll likely just drop a black box for the entirety of the underlying background (it’s all black anyway)

1 Like
4

You can also use an image clip for the background on V1 if you want. Or event a video clip.
As long as they fill the entire screen with opaque pixels, the transitions will work.