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Maniphest T34811

VSE - Wrong result of add/subtract effects
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Description

--- Operating System, Graphics card ---
WinXP and Linux Ubunt


--- Blender version with error, and version that worked ---
Is not working with official release blender 2.66 and 2.66 r55662

works with official blender release 2.65a

--- Short description of error ---
I am using several functions in the sequencer (ADD, MULTIPY, SUBTRACT) in combination with PNGs and a Video. The result should have a white oval formed frame. But the frame is black


--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
I attached a .blend file, which can be used for reproducing.

Event Timeline

Igor Petrovski (fladen) edited a custom field.Mar 29 2013, 7:35 PM
Igor Petrovski (fladen) attached 1 file(s): F25793: add.zip.
Igor Petrovski (fladen) attached 1 file(s): F25795: solution.pdf.Apr 5 2013, 8:40 PM

I had a look at the sources of blender and then I found something, which lead to my awkward outcome.

Attached is a PDF with explenation, what I have changed to make it work. I hope, it is helpfull.

Igor Petrovski (fladen) attached 1 file(s): F25797: seqeffects.c.Apr 5 2013, 10:19 PM

In the meantime, I had also a look at do_mul and do_add. After changing them, too, all my issues were solved. I had also some issues with rendering (animating) into MPEG.

Attached is the new seqeffects.c I am using now. I marked all changes I have done with //ICHANGED. So it is easy reproducable, what I have done.

The changes seem not to have a global impact.

Sergey Sharybin (sergey) added a comment.Apr 9 2013, 6:21 PM

Fixed in svn rev55924. Thanks for the report and your investigation (used different approach tho).

Sergey Sharybin (sergey) changed the task status from Unknown Status to Resolved.Apr 9 2013, 6:21 PM