[FFmpeg-user] draw a circle?

[Daniel Muller]

Why anyone would use ffmpeg to draw into video, when there is
imagemagick to draw into picture and ffmpeg has filters to add picture
in the video..?
----
Daniel Muller, Prague, CZ


On Fri, Jan 24, 2014 at 9:51 AM, Stefano Sabatini <stefasab at gmail.com> wrote:
> On date Thursday 2014-01-23 19:17:30 -0500, Dave Rice wrote:
>> Hi all,
>
>> Is it possible to draw a circle in ffmpeg with the existing filters?
>
> No current way. Adding a drawshape filter would be cool (or
> alternatively allow filter scripting and use a scripted drawing
> library, but this is much more effort).
>
>> In this case I have a square video frame but want to draw a circle
>> over it where the center of the circle is the center of the video
>> frame and the diameter of the circle is equal to the width (and
>> height) of the video frame. Sort of like `ffplay -f lavfi
>> color=s=1024x1024 -vf drawbox=color=white:x=w/2:y=h/2` but with a
>> circle instead of square.
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