[FFmpeg-user] insert a logo with transparency

[Carl Eugen Hoyos]

Rossana Guerra <guerra.rossana <at> gmail.com> writes:

> Hello I have logo.bmp, I need not to display the logo background. 
> The logo is well inserted, but not with alpha.

While the bmp specification is not completely clear about alpha 
(I don't think it was meant to be supported), FFmpeg does support 
alpha in bmp (as do ImageMagick and Gimp), so please provide the 
complete, uncut console output together with your command line.

Carl Eugen