Render animation with transparent background

Support Basics & Interface
1

Hey,
I tried to use a few codecs and set RGBA on, but the background won’t be transpparent no matter what i do. Which codec should i choose or/and which other options?

thanks

2

Use a format that can support transparency such as a .png image sequence. Untick Sky in the render layers.

3

But how do I then combine all of the 300 PNGs into movie?

/EDIT: Ok, I made a movie from PNGs with VirtualDub. Thanks.

4

Virtualdub for instance. Every video converter/simple editor that is not complete crap can handle image sequences.

You can also load them in Blenders VSE and export it to a compressed container. (just not QT trolololo)

5

Take my Blend File. Just open it and Render
It will create 48 frame Transparent Background Mov file

Attachments

trans_back.blend (189 KB)

6

I can’t believe this. I exported PNG images and opened them up in VirtualDub but somehow the background isn’t transparent (it’s gray), although I can see that PNGs are transparent. Is there some special option in virtualDub?

7

Ok Just download this file
http://cid-19175b1ae4c9f4f5.office.live.com/self.aspx/Public/free48.zip
and extract it and use see what happens?
see this video http://www.youtube.com/watch?v=WvxyNGfWFtM
In this there is only one (transparent Mov Chamel file 17 Fame and replicated ) but not with vertual dub
Its 2d Animation software called anime studio pro. Transparent Mov created with Blender

8

There are only a handful of video formats that support an alpha channel (for instance, QuickTime’s Animation codec). Unless you have an absolute need for a single video file, I’d recommend sticking with the image sequence until you do your final composite to render to a video format that doesn’t support alpha. If you absolutely need an alpha channel in a single video file, you can do that using Quicktime (outside of Blender) or with FFmpeg (I can provide you with the command line stanza I use).