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I'm trying to create a split screen animation (from static images though) for a part of a video. I'm following along a tutorial on this https://www.youtube.com/watch?v=9KrnywS9_vs (a little older, but it should still work).

The general routine for this is:

  • Add both images as strip to the editor
  • Add a transform for each
  • Change effect > scale X to 0.5 for each (horizontal split)
  • Change the position of one to 25 and the others to -25
  • Change blend to add for both
  • Set opacity on the actual image strips to 0 (to hide the full sized)

Now, in the backdrop this looks actually fine, but in the output preview it is just empty (and renders to black). I can't really find a point at which it fails. Sometimes it's previewing until I change the opacity, sometimes only until I change the blend. [Solved the preview, see edit. Output still doesn't work.]

Output empty

If I offset the strips by one frame, it does show the splits just fine, but one half empty/black (obviously).

enter image description here

Does somebody have an idea what I'm doing wrong here?

Render settings are default (50% 1080p), input images are png (480x540). Blender version 2.78.

I know that there is a problem with cycles in 2.78 not displaying png images as textures, but that shouldn't be the cause for this I think.

If more information are needed, tell me. (Or if somebody has a better question title.)

Edit: Ok, little thing I found out: When I change the channels of preview to draw from ´color and alpha´ to just ´color´ in the vse it does preview correctly now. The output is still black.

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  • $\begingroup$ I think that you are rendering an empty frame. Tha background image in 3D view is only for layout help, it does not get rendered. $\endgroup$ – 3pointedit Sep 7 '17 at 3:05
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    $\begingroup$ If you set the "Blend" modes for all four strips to "Alpha Over," does it work the way you expect/want? $\endgroup$ – risingfall Jan 17 '18 at 3:27
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Is sequencer output option selected in the scene render properties panel?

seq out

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  • $\begingroup$ It is, yes. It does give output on a single strip (just a simple sequence or e.g. the second screen, where the two single split screen parts after displaced by one frame). $\endgroup$ – Gunnar B. Apr 17 '17 at 13:23

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