Skip to main content
C
Cobraflex
Participant
April 24, 2017
Answered

Alpha channel video render problem (black stage coming through)

  • April 24, 2017
  • 3 replies
  • 3382 views

I am having problems with Animate CC rendering video with white objects turning grey and having dark borders when video is rendered with alpha channel. Even if the stage is white, it renders the top layer as if there is a black stage underneath. This was never a problem in CS6, but it seems to be a permanent bug in CC. Has anyone found a workaround for this?

thanks

Tim

    This topic has been closed for replies.
    Correct answer Preran

    Fantastic, thankyou. Fingers crossed they can get it fixed...

    Tim


    The team confirmed that they have logged a bug for it and will be fixed in a future update. Stay tuned.

    Thanks,

    Preran

    3 replies

    V
    ValerK
    Inspiring
    June 24, 2020

    Hi,

    "will be fixed in a future update" -> Adobe said this 3 years ago! In Animate 2020 this issue still persists, in other words Animate is premultiplying against black. Please fix. Thanks.

    B
    benjamink24616016
    Participant
    July 13, 2021

    Its now 2021 and the issue is still there, wow

    I
    Initiate
    Participant
    July 13, 2021

    I've found a solution that works for me, at least if you're talking about importing Animate video into After Effects. When you import the clip, it brings up a dialog box asking how to interpret the alpha channel. Press the "Guess" button, and then OK, and... it works!

    C
    CobraflexAuthor
    Participant
    April 25, 2017

    Thankyou Colin, Yes, that exactly explains the issue, and it seems to be a glitch with the Animate that didnt exist when it was Flash.

    Preran, is this an issue that will be dealt with in a future update of Animate CC? It is quite a fundamental flaw in the program and renders it all but useless for making animated video content with alpha channels now.

    thanks

    Tim

    Preran
    Community Manager
    PreranCommunity Manager
    Community Manager
    April 26, 2017

    Colin: Thank you for clarifying the issue.

    Tim: Let me check with the team if they have a bug logged for this issue. I will get back as soon as I have some info.

    Thanks,

    Preran

      C
      CobraflexAuthor
      Participant
      April 29, 2017

      Fantastic, thankyou. Fingers crossed they can get it fixed...

      Tim

      Preran
      Community Manager
      PreranCommunity Manager
      Community Manager
      April 24, 2017

      Thank you for reporting this issue. Can you provide step by step instructions on how to reproduce this issue so that I can share it with the Animate support team for their investigation?

      Thanks,

      Preran

      Colin Holgate
      Colin Holgate
      Inspiring
      April 24, 2017

      Allow me:

      1. In a new FLA, white stage, make a green circle.

      2. File/Export/Export Video, uncheck Media Encoder, uncheck make alpha, export to last frame.

      3. Open the single frame MOV in Photoshop. Note how lovely the antialiasing is between the green and the white.

      4. File/Export/Export Video, check the box to generate alpha channel.

      5. Open the MOV in Photoshop. Notice how the edges of the green have a grayness to them. It shouldn't, it should have alpha transparency to whatever is behind it.

      In other words, Animate is premultiplying against black, when it shouldn't do. This image shows the results from Animate on the left, and what it should look like on the right:

      http://colin.scienceninja.com/greendots.png

        Terms & ConditionsAccessibility statement
        Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices