In-band data

[Stefan Sauer]

On 10/13/2011 03:38 PM, Wesley J. Miller wrote:
> A few weeks back a posting asked about building a frame (video I
> think)  consisting of one byte or many copies of one byte that could
> be injected into a stream on the sender side and picked out on the
> receiver side of a network connection (UDP?).  The goal was to pass
> "hidden" in-band data along with the frame.
You can just send a custome synchronized event. That is essentially a
named gst structure. And you can just pluck that with an event-pad probe
on the receiver side.

Stefan

>
> First, can someone point me to those post(s)?  I tried, but Google as
> I might, I can't find a search pattern that will get to them.
>
> Secondly, is this a workable idea?  
>
> In my case, I am passing 2 way live audio (an intercom, mostly) so it
> has no built-in tag info I am aware of.  Could I just as easily add
> the stream info and "misuse" it as an in-band message passing method?
>
> The message info I need to pass is to a UDPSRC pipeline to tell it the
> port where a to-be-instantiated UDPSINK pipeline is to send its reply
> stream.  Goal is to avoid a lot of out-of-band info passing.
>
> Third, am I correct in believing that a padprobe on the receiver side
> could pick out the frame and by returning FALSE, remove it from the
> data stream without halting future packets?
>
> Wes
>
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