Track matted stinger causes stinger to stretch to fill entire 3840x1080 area.

[sigmoyd]

Hi, title says it all really. Have included a screenshot of the properties panel, the webm transition file and OBS output when using it to try to give a better idea of what's happening.

Stinger+Matte: https://youtu.be/1h3ZUGhM4kI
OBS Display: https://youtu.be/YL3G9n_SmKk

Any help much appreciated!

 

[Suslik V]

Track matte part is not an alpha channel for the effect video. It is for how the scene "A" is replaced by the "B". The alpha channel should be present only on the stinger's half of the image (on the track matte's part it does nothing).

 

[sigmoyd]

The track matte has a black background. Is there a way to encode only the stinger side of the video with alpha?

The fading on the track matte part was unintentional and has been fixed but the stinger part still appears stretched.

 

[Suslik V]

Example is here:

Stinger dont work

I have created a movie file. On the left i have the stinger video, and on the right "the mask". When i selected 'use a track matte', and 'same file, side-by-side', dont work the opacity (or mask), only show the stinger video. Why? I attach the video: https://vimeo.com/556643772

obsproject.com

 

[Suslik V]

...Is there a way to encode only the stinger side of the video with alpha?

No. It only means that there is no sense to draw any alpha animations on the track matte's half of the image. You can leave it solid black or white.

 

[sigmoyd]

Okay good, that's what it's doing on the fix - what relevance does the alpha channel have to the stretching though?

Found a way around this by halving the width of each part while maintaining the same height - although the docs say the matted transition should be 3940x1080

 

[Suslik V]

Image is divided in half always. No matter what size is. Then some kind of the "Fit to screen" is applied if the resulting stinger (that was halved) is smaller by some side.

Make sure that the image is exactly twice bigger.

 

[Suslik V]

The wiki page:

Getting Started With Track Matte Stinger Transitions

OBS Studio - Free and open source software for live streaming and screen recording - obsproject/obs-studio

obsproject.com

has disadvantage that it shows looped animations, but the example of the side-by-side video has no synchronized view of the final effect. Actually it starts from the black on both sides (only "A" is visible) and ends in the black on the left and white on the right (only "B" is visible).