Re: overlay safe zones

wow!

that's just what I need!!
so simple and useful.

reading the page about overlay was scary and I'll take a look at other
options too, but this is just what I expected.

thanks a lot!

mussol

Missatge de Alexander Strasser <[email protected]> del dia dl., 20 de
jul. 2020 a les 11:57:
>
> Hi all!
>
> On 2020-07-19 16:09 -0400, The Wanderer wrote:
> > On 2020-07-19 at 14:49, muzzol wrote:
> >
> > > I need to monitor several streams and I would like to see safe
> > > zones: https://eks.tv/wp-content/uploads/2018/09/Safe_Areas.jpg
> > >
> > > is there a way to overlay that on mplayer?
> >
> > For this, you want a video filter.
> >
> > The one I specifically remember for doing overlays, from when I was
> > active in MPlayer, is 'bmovl', for 'bitmap overlay'. The man-page
> > section on that filter doesn't look especially user-friendly
> > (significantly less so than I thought I remembered from discussions back
> > then, in fact), but it doesn't look impossible either.
> >
> > Googling for 'vf bmovl' (without quotes) finds pages such as
> > https://www.linuxjournal.com/content/overlay-images-video-using-mplayer-and-mencoder,
> > which provides a worked example of someone apparently using this in the
> > real world (albeit apparently back in 2010).
>
> Wow, the article behind that link seems to convey a sad story :/
>
> But yes bmovl should be usable. I used surely used it myself,
> a few years ago when fixing a bug.
>
>
> > Searching the man page for 'overlay' also finds mention of the
> > libavfilter filter named 'overlay', which is labeled as experimental and
> > is apparently meant to overlay one video on top of another video; that
> > doesn't look as suitable for what you're talking about, but something
> > could probably be kludged together.
>
> Using libavfilter overlay from MPlayer is currently not possible.
> If you want to use it, you could process the video with ffmpeg
> before displaying the video with mplayer.
>
>
> > There might be more, but that's all I'm coming up with at the moment.
>
> For the case at hand I would recommend to first try to use multiple
> instances of the MPlayer video filter named rectangle. Should be a
> cheap starter and maybe even sufficient.
>
>
> Happy video filtering :)
>
>
> Best regards,
>   Alexander
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> [email protected]
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