Go Back   Cockos Incorporated Forums > REAPER Forums > REAPER for Video Editing/Mangling

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-05-2018, 07:00 AM   #1
sonicowl
Human being with feelings
 
sonicowl's Avatar
 
Join Date: Oct 2015
Posts: 347
Default video processor: multiply with alpha, compositing

I'm looking for a way to crop video on one track with black/white image (or video) on a second track. Like this: https://en.wikipedia.org/wiki/Alpha_compositing

Two tracks get combined into one. Result would be partly seethrough video - transparent on black parts and fully visible on white parts. Video editors have this, but I cannot figure out how to do it in Reaper (apart from basic croping to rectangle).

Has anybody already written preset for video processor that can do this, and can share it?

Otherwise, which function in video processor would be appropriate for this task?

Thank you for help.

Last edited by sonicowl; 11-05-2018 at 07:21 AM.
sonicowl is online now   Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 02:40 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.