Render as alpha preserving MOV

Development Feature discussions
1

I am using synfig to generate little animations that pop up during my documentaries (like the informational tips in History Channel documentaries). Currently the only alpha supporting output from Synfig is PNG. Since I know how to convert this via avconv (ffmpeg) it’s not a huge problem, but it would be nice if this rendering command could be merged in as one of the output options:

avconv -y -r 24 -i frame.%4d.png -vcodec qtrle -pix_fmt argb out.mov

This way a video that preserves alpha that can be dropped into a sequence editor (like kdenlive) could be rendered. This makes it easier to import effects, pop up windows, and similar animations.

2

Hi howtophil, thank you for the tip with avconv. IIRC our ffmpeg interface doesn’t allow full custom commands. I think that it would be the best way to implement more complex ffmpeg commands like that.

Let’s see if someone can implement that in the code.

Cheers!
-G