How to create a video with a transparent background

Question Animation

December 20, 2024 8:12pm

I have an object with a moving camera and I want to render this animation with a transparent background. But I can't find any RGBA anymore. And if I try with QuickTime (Container) and QuickTime Animation (video codec), I still get a black background. What can I do to resolve that issue? (I don't think that exporting my images in PNG would be the best solution but I may be wrong.)

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Martin Bergwerf replied December 21, 2024 7:57pm

That would probably be easiest done in the Graph Editor, or even just in the Dope Sheet (moving Keyframes further apart at certain times).
Handy Shortcut: E moves Keyframes at the right side of the 2D Cursor (in those Editors).

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Marie Delagrave(delama) replied December 21, 2024 7:59pm

Dope Sheet? (sigh) ...That's Chinese for me. 😢

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Martin Bergwerf replied December 21, 2024 8:23pm

You can select it here:
It shows the Keyframes, but not all the curves/interpolations of the Graph Editor. It's very sinmilar to the Timeline, but has a little bit more information.

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Marie Delagrave(delama) replied December 21, 2024 8:25pm

I'll try that.

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Martin Bergwerf replied December 21, 2024 8:31pm

And just in case I will be away for today, here is sort of how I separated Foreground and Background; I used 2 Scenes, Foreground (Christmas Cat and Lights, for instance) has Transparent checked:
The other Scene (start with Full Copy, to the right of the Scene name) has Transparent un-checked and all foreground elements (or the Collections that they are in) set to Hold Out (Filter if that doesn't show up in the Outliner):

I hope that is sort of clear 😉

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Marie Delagrave(delama) replied December 21, 2024 8:33pm

I will study that with attention. THANK YOU!

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