I created and saved the presets in Shotcut. Then edited and replaced the pixel values with percentage values to make the preset “adapt” to different resolutions. This thread has more information about the process.
Tried it with 50 fps and 30 fps. The preset works with both frame rates. It does adapt.
I set the length of the transition to 1 second so I’m assuming
means the transition length is one second.
The other questions need to be answered by Dan. He’s the one who knows all about how the presets and key frames work.