qw <applemax82 <at> 163.com> writes:

> I place a logo image on a video, and overlayed video 
> should have transparent effect. What's the ffmpeg
> command to create this kind of video?

Generally, you are expected here to provide the command 
line that you tried together with the complete, uncut 
console output and an explanation what went wrong.

However, the following places a logo on a video:
$ ffmpeg -i video -loop 1 -i logo -filter_complex 
overlay -qscale 2 out.avi

Carl Eugen

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