Transparency not rendering - cycles

Hi Blenderers,

I’ve run into a rather annoying problem with my renders. For some reason, I can’t get Blender to output an alpha channel.

I’m using .png
I’ve got RGBA selected
I’ve got “Transparent” under Film selected

If I render a single frame and save it, I get the alpha channel.
But if I use the “Animation” button to render out a sequence…no alpha.

Ahhhh…help!?

Can’t confirm this - seems to work fine here when rendering to a PNG image sequence.
What version of Blender do you use?

You need to select a video format that you want to render to that actually supports an alpha channel. Therefore pretty much limited to an image sequence or quicktime animation codec.