Alpha channel video render problem (black stage coming through)

New Here ,
Apr 24, 2017 Apr 24, 2017

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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

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Adobe Employee , May 04, 2017 May 04, 2017
The team confirmed that they have logged a bug for it and will be fixed in a future update. Stay tuned.Thanks,Preran

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Adobe Employee ,
Apr 24, 2017 Apr 24, 2017

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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

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Adobe Community Professional ,
Apr 24, 2017 Apr 24, 2017

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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

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New Here ,
Apr 25, 2017 Apr 25, 2017

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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

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Adobe Employee ,
Apr 26, 2017 Apr 26, 2017

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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

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New Here ,
Apr 29, 2017 Apr 29, 2017

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

Tim

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Adobe Employee ,
May 04, 2017 May 04, 2017

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

Thanks,

Preran

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New Here ,
May 04, 2017 May 04, 2017

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great, thankyou!

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New Here ,
Mar 31, 2020 Mar 31, 2020

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Hi there! I've been having the same problem, even in the latest version, Animate CC 2020. Has this issue not been addressed, or are there any workarounds available? 

Thanks,

Kevin

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Community Beginner ,
Jun 24, 2020 Jun 24, 2020

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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.

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