[FFmpeg-user] How to make partially transparent png image

[Moritz Barsnick]

On Sun, Jun 28, 2015 at 09:27:02 -0700, compname at verizon.net wrote:
> >IrfanView is not free
> 
> Well, OK for commercial use it's not free.  But just about any 
> business (that's planning on staying in business anyway) isn't going 
> to quibble over the $12 reg. fee.  And for us 
> individuals/educators/etc. it is free.

Well, there are always other tools. gimp, if you want to use a GUI (but
who does). ImageMagick and graphicsmagick should be able to do this
from the command line (so says Google).

> I've recently used the geq filter to do just that.  But I never 
> considered FFmpeg to be a (still) image editor/converter, even though 
> it does work nicely as such (-i in.bmp -vf [image filters] -c:v png out.png). 

It helps to avoid installing extra tools if you're in a somewhat
restricted environment.

Moritz