Re: [Mlt-devel] creating picture in picture filter for melt

[Dan D. <da...@de...>]

On Wed, Apr 28, 2010 at 7:49 AM, Fabio Varesano <fa...@va...> wrote:
> Hi guys,
>
> I'd like to create a picture in picture filter (or any other way to do
> this). The goal would be to create an output video with something like
> this: http://www.computertimeco.com/ctpvr/images/ss/ctpvr-pip1.gif
>
> Where should I start reading code or docs to create something like
> this? Is there some filter/plugin which partially implements something
> similar which I should learn from?
>
> The final goal would be creating a website usability testing video,
> were on the big video area there is the screen of the user and in the
> little area there is the user's face.

Use the watermark filter (easier than using multiple tracks and
composite transition).

See the demo directory in MLT if you have not already, specifically,
'mlt_bouncy'. That is an animated pip. For static, replace all of the
composite.* properties with a single composite.geometry="x,y:wxh".
Also, I suggest adding composite.progressive=1.


melt A.mp4 -filter watermark:B.mp4 composite.geometry=10%,10%,20%,20%
composite.progressive=1

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+-DRD-+