GStreamer Videomixer with Raspberry Pi's Camera

[Tim Müller]

On Tue, 2014-07-22 at 12:00 -0700, Madnness wrote:

Hi,

> Hello, I have been running in to some headache with Gstreamer's pipeline
> format especially trying to use the videomixer function. What I am trying to
> do is get gstreamer to duplicate the input video stream from either raspivid
> or rpicamsrc, a gstreamer wrapper for raspivid, and display them side by
> side. Then send the stream via tcpserversink. I am currently using gstreamer
> 1.2 on the newest raspbian wheezy and I am not using gst-ffmpeg so I can't
> use ffmpegcolorspace. I have posted something about this on stackoverflow
> and raspberrypi's forums and have yet to hear any advice and I have searched
> far and wide for an example of the raspberry pi camera being used with
> gstreamer's videomixer. Most of the stuff I find are using webcams not the
> rpi camera.
> Well I would be extremely grateful for any advice/guidance. Here is what I
> have so far:
> 
> /gst-launch-1.0 -v ! videomixer name=mix ! videoconvert ! tcpserversink
> host=192.168.1.36 port=8090 ! fdsrc | raspivid -t 999999 -h 568 -w 640 -fps
> 20 -hf -b 2000000 -o - ! h264parse ! videoconvert ! videobox border-alpha=0
> left=-640 ! mix. fdsrc | raspivid -t 999999 -h 568 -w 640 -fps 20 -hf -b
> 2000000 -o - ! h264parse ! videoconvert ! videobox border-alpha=0 right=-640
> ! mix. /
> 

I would suggest you use this rpicamsrc element

https://github.com/thaytan/gst-rpicamsrc

instead of piping data from raspivid into the pipeline. It basically
does what raspivid does, just with proper timestamps and everything.
Should be nicer to use.

Cheers
 -Tim

-- 
Tim Müller, Centricular Ltd - http://www.centricular.com