UDP Payloader (mrubinstein at rai-dev.com)

Robert Krakora robkrakora at att.net
Wed Nov 7 12:35:35 PST 2012


> On Mon, 2012-11-05 at 16:47 -0500, Michael Rubinstein wrote:
> 
> Hi,
> 
> > I apologize for reposting, but my last message fell thru the cracks.
> >
> > We need to send MPEG Transport Stream packets using UDP with seven TS
> > packets per UDP packet.  Each UDP packet needs to be 7 * 188 = 1316
> > bytes.  Also the UDP packets need to be transmitted at a constant
> > rate, not in a burst.
> > 
> > The buffers that are produced by mpegtsmux are large.
> >
> > Is there a way to do this that I missed?
> >
> > Would it be better to change mpegtsmux , write a ?Payloader? or
> > something else?
> 
> Ideally mpegtsmux knew to automatically do the right thing in this case,
> but I'm not sure how to best do that yet.
> 
> Maybe rtpmp2tpay ! rtpmp2tdepay works as a hack for the time being..
> 
>  Cheers
>   -Tim

Thanks for the payloader/depayloader idea.

I'm leaning toward implementing a custom sink element.  We're very
concerned about jitter.

Michael


I have used mpegtsmux and rtpmp2tpay in a pipeline along with gst-rtsp-server 
and have not seen problems with jitter on the other end.  My video conferencing 
application is deployed on a large school campus and I see no issues.  It is ran 
in both unicast/multicast modes...

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