question about caps filters

[Chuck Crisler]

Thank you Tim. That helped my find my next error and get much further! :-)
I am still trying to really understand the details of how all of this comes
together. One piece at a time!

Chuck

On Tue, Feb 5, 2013 at 4:25 PM, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:

> On Tue, 2013-02-05 at 16:15 -0500, Chuck Crisler wrote:
>
> Hi,
>
> > I am working to extend the v4l2src element to work with a Sensoray
> > hardware encoder. I now have the v4l2src element recognizing the H264
> > capability of the card. The next problem is negotiating between the
> > v4l2src and rtph264pay or mpegtsmux (sorry, I am stuck with the
> > antiquated 0.10.xx code - which actually works quite well). If I
> > specify the command as: gst-launch v4l2src
>
> This:
>
> > .. ! 'video/x-raw-yuv, format=(fourcc)H264' ! ...
>
> does not make sense. Either it's raw or it's H264. v4l2src should output
> video/x-h264 caps. If it doesn't, rtph264pay or h264parse etc. will not
> be able to accept it.
>
> FWIW, there's an uvch264src element in gst-plugins-bad in git in the
> 0.10 branch, which *might* help (I don't know if it does, I guess it
> depends on the driver).
>
>  Cheers
>   -Tim
>
> > rtph264pay pt=96 ! ... it fails linking the v4l2src (actually the
> > capsfilter src pad) and rtph264pay. I think that this is a caps issue.
> > The rtp payloader wants video/x-h264 as input. How do I specify the
> > caps to make all of the elements link?
>
>
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