Matte transition issue

[Samlmdg]

Operating System Info

macOS 10.14

Other OS

No response

OBS Studio Version

27.0.0-rc1

OBS Studio Version (Other)

No response

OBS Studio Log URL

OBS Studio Crash Log URL

No response

Expected Behavior

I'm try ti use stinger with alpha track matte (matte is at the bottom of my stinger file) Size of my video : 1920x 2160

Current Behavior

When I try to use transition with track matte alpha channel is not used ans transition comes after the stinger

Steps to Reproduce

1. edit stinger
2. select file with transition & track matte
3. check "use track matte", then "Same file stacked (stinger on top, track matte at the bottom)
   ...

Anything else we should know?

No response

[WizardCM]

Try it without obs-websocket installed.

[Samlmdg]

2021-04-05 15-18-35.txt

Same issue :(

[WizardCM]

Please include the stinger video file.

[VodBox]

There has been a common misconception being reported about how the feature works that you seem to have run into. The track matte portion is not describing the alpha of the stinger (like you would have with a key + fill in SDI workflows), but instead the track matte describes the transitioning between the scenes. The stinger portion itself must still be a transparent video to have proper alpha at this stage.

Per our recently added wiki guide:

In the mask video, black pixels tell OBS where to show pixels from the current scene, where white pixels tell OBS where to show pixels from the next scene. Pixels inbetween plain black and plain white are allowed too, and allow for crossfades from the current scene to the next scene.

You can see in the following images how it's intended to be used: