Video overlay using VAAPI

[Víctor Jáquez]

On Thu, 14 Jun 2018 at 11:57, Wolfgang Grandegger wrote:
> Hello,
> 
> Am 13.06.2018 um 13:45 schrieb Nicolas Dufresne:
> > 
> > 
> > Le mer. 13 juin 2018 04:57, Wolfgang Grandegger <wg at grandegger.com
> > <mailto:wg at grandegger.com>> a écrit :
> > 
> >     Hello,
> > 
> >     I want to program a GStreamer pipeline overlaying a video generated with
> >     "videotestsrc" over a video received from the network on an Intel PC
> >     (VAAPI).  What is the most efficient way to realize such an overlay. The
> >     overlay works fine with "clockoverlay" but I have not found yet a
> >     solution with "videotestsrc".
> > 
> > 
> > I believe best would be to use glvideomixer.
> 
> OK, thakns, the following is working:
> 
> # gst-launch-1.0 glvideomixer name=m ! vaapisink \
> 	videotestsrc ! video/xraw,format=RGBA,width=1280,height=800,framerate=30/1 ! \
> 	m.  videotestsrc pattern=1 ! video/x-raw,format=RGBA,width=1280,height=50 ! m.
> 
> But when I try to read a MJPEG encoded stream from the network it's not
> shown, but just the overlay:
> 
> # gst-launch-1.0 -v glvideomixer name=m ! vaapisink display=1  \
> 	udpsrc port=50004 ! application/x-rtp,encoding-name=JPEG,payload=26 ! queue ! \
> 	rtpjpegdepay ! vaapijpegdec ! vaapipostproc ! \
> 	m. videotestsrc pattern=1 ! video/x-raw,format=RGBA,width=1280,height=50
> 	! m.

I guess, what you want is this

gst-launch-1.0 -v glvideomixer name=m ! vaapisink \
  videotestsrc pattern=1 ! video/x-raw,width=1280,height=720 ! m. \
  udpsrc port=50004 ! application/x-rtp,encoding-name=JPEG,payload=26 ! queue ! \
  rtpjpegdepay ! vaapijpegdec ! vaapipostproc ! m.

> 
> It's difficult to understand what's working together. Maybe it's because I mixed elements
> from "vaapi" and "opengl" modules. 
> 
> The following works just fine.
> 
> # gst-launch-1.0 udpsrc port=50004 ! application/x-rtp,encoding-name=JPEG,payload=26 \
> 	! queue ! rtpjpegdepay ! vaapijpegdec ! vaapipostproc ! vaapisink
> 
> 
> Wolfgang.
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