[meta-freescale] Overlay image and Text over video using hardware module in i.mx6

[Sachin Deshpande]

Hello Philip,

Thanks for the reply.

The above suggestion  means that I need to do the overlaying at the client
end. I want  to do this at server i.e. encoder end as I want to multicast
the stream .

If I do this at the encoder and multicast the stream then I will not need
any sync at clients to display the text it will just plain decoding and
displaying the stream.

Is there a way to do this or the overlay is possible at client only ?

Regards,
Sachin





On Sat, Feb 8, 2014 at 8:57 AM, Philip Craig <phil at blackmoth.com.au> wrote:

> On Fri, Feb 7, 2014 at 10:55 PM, Sachin Deshpande <3mediatech at gmail.com>
> wrote:
> >
> > I am new to i.mx6q board.
> >
> >
> > I  am trying to implement the following scenario
> >
> >
> >
> > 1) Input video stream from STB / IP to server
> >
> > 2) Stream the video with periodically overlay Image and Text over the
> video
> > and stream
> >
> >
> >
> > For the above purpose I am doing the overlay using gstreamer.
> >
> >
> > But as the mixing/overlaying  is happening at CPU level the performance
> for
> > higher resolution is very poor. Is there a way to perform
> mixing/overlaying
> > in hardware so that I can achieve the real-time video.
>
> The hardware supports overlaying framebuffers. You can use /dev/fb0 as
> the background framebuffer for video, and /dev/fb1 as the foreground
> framebuffer for text, and use alpha in pixel to make the text
> background transparent. This needs some configuration of /dev/fb1. You
> need to set the resolution, enable alpha in pixel and unblank the
> framebuffer. See https://community.freescale.com/thread/303279 for
> ioctls to do this.
>
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