[gst-devel] Overlaying an image on a live stream

[sudarshan bisht]

Hi ,

 videomixer works on AYUV ( that means yuv data having alpha values for
transparency ) and pngdec  gives RGB data , that's why these two elements
 are not linking .

Try putting ffmpegcolorspcae after pngdec .

On Wed, Mar 31, 2010 at 12:58 AM, Vogan <vaughan at infact.co.nz> wrote:

>
> Hi
>
> I am wanting to overlay an image (crosshairs inthis case) on top of a
> stream
> from a web cam.  The image is a png file with a transparent background.
>  The
> pipeline I have tried is
>
> gst-launch v4l2src device=/dev/video0 !
> 'video/x-raw-yuv,width=640,height=480,framerate=30/1' ! videomixer name=mix
> ! xvimagesink ! filesrc location=crosshair.png ! pngdec ! mix.
>
> When I try to run this I get WARNING: erroneous pipeline: could not link
> pngdec0 to mix
>
> Any hints on what I am doing wrong? or is it simply not possible to overlay
> a static image on a live stream?
>
> Vaughan
>
> --
> View this message in context:
> http://n4.nabble.com/Overlaying-an-image-on-a-live-stream-tp1745726p1745726.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>



-- 
Regards,

Sudarshan Bisht
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20100331/069410a8/attachment.htm>