could not link vtdec0 to videobox0

[Who AmI]

Hi Slomo,

At the server side i am using gstreamer 0.1 and client side i m using
gstreamer 1.0 [ build 1.4.5] which has a vtdec in iPAD.

Does version mismatch between client and server  creates an issue ?



On Wed, Apr 22, 2015 at 7:15 PM, Sebastian Dröge <sebastian at centricular.com>
wrote:

> On Di, 2015-04-21 at 13:32 +0530, Who AmI wrote:
> > Dear all,
> >
> > I am trying to implement Picture In Picture feature in iPAD using
> GStreamer.
> >
> > As a first step, i tried to understand videobox, and executed the below
> > command
> > in the command line in MAC.
> >
> > ./gst-launch-1.0 udpsrc port=5000 ! "application/x-rtp,
> > encoding-name=(string)H264, payload=(int)96, clock-rate=(int)90000" !
> > rtph264depay ! h264parse ! vtdec   ! videobox top=-10  bottom=-20 !
> > glimagesink sync=false
> >
> > The below command works fine.
> >
> > The same think i tried using GStreamer SDK.
> >
> >
> >    pipeline = gst_parse_launch("udpsrc port=5000 ! application/x-rtp,
> > encoding-name=(string)H264, payload=(int)96, clock-rate=(int)90000 !
> > rtph264depay ! h264parse ! vtdec   ! videobox top=-10  bottom=-20 !
> > glimagesink sync=false", &error);
> >
> >
> >
> > Unfortunately i receive the below error:
> >
> > could not link vtdec0 to videobox0
> >
> >
> > That is:
> >
> > *0:00:01.127516000  2660  0x3132860 ERROR           GST_PIPELINE
> > ./grammar.y:616:gint gst_parse_perform_link(link_t *, graph_t *): could
> not
> > link vtdec0 to videobox0*
> >
> > following that,
> >
> > udpsrc0: Internal data flow error .
> >
> > Please let me know what is the issue ?
>
> Check the GStreamer debug logs, it most likely says something about
> incompatible caps. Are you using the same GStreamer version for both?
> Does it work if you add a videoconvert between vtdec and videobox?
>
> --
> Sebastian Dröge, Centricular Ltd · http://www.centricular.com
>
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>
>
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