Inkscape.org
Beyond the Basics Premultiplied Alpha
  1. #1
    bobopolis bobopolis @bobopolis

    Does anyone know a way to export a pre-multiplied PNG file?  Basically, my use case is I have a Blackmagic Design ATEM Mini Extreme (live production video switcher) that makes it easy to display advanced graphic overlays over video when in a Pre-multiplied format.  Here are a couple of links that describe how to do it in Affinity.  Does anyone know how to achieve the same results using InkScape?

    (46) Photoshop not required! Titles, Lower Thirds Graphics for ATEM - ATEM Mini Tutorial 05 - YouTube
    https://youtu.be/WgaBepoBunI

    Thank you for your help!

     

  2. #2
    Tyler Durden Tyler Durden @TylerDurden⚖

    Good question. It might be possible, but devs would need to enable it if it is even possible.

    You could ask on the chat channel: https://chat.inkscape.org/channel/team_devel

  3. #3
    FwhPixelink FwhPixelink @Fwhpixelink
    *

    This is as close I have come to what Affinity does.

    - Create object

    - Go to Filters and select Shadows/Drop Shadow

    - After applying to object.

    - Repeat the Shadow effect again on the same object

    - You may need to create a black background to use in ATEM. Not sure though about that

    - Then export

    All Affinity is doing is doubling the shadow effect.

     

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