alpha channel WHITE in animation I have 100 pngs images having a transparent background, and I need to render them in an animation - mp4-h264.
I did that in blender but the default background color for the rendering is black, while I need it white, and I'm not able to find anywhere an option for changing the alpha channel (there is the option if I want to render just an image, but not the whole animation).

Any tips?
I suppose you are making the animation in the Video Sequence Editor so you could add a white strip in the background.


Shift + A &rarr; Effect strip &rarr; Color.
In its properties (n) go to Effect strip section an change the Color to white.
Render again.


Maybe you need to select the Alpha Over mode in Blend option of the strip with your image sequence so it uses their alpha channel.