Injecting custom data into mpegts via udpsrc

[Jesper Taxbøl]

I have now implemented my issue in a public repo

https://github.com/taxfromdk/mpegtsmux_metadata

I can add that I am working in Ubuntu 20.04 and I am using the apt-get
version of gstreamer.

GStreamer 1.16.2

I hope this can shed some light to my issue.

Kind regards

Jesper


Den tor. 23. sep. 2021 kl. 12.22 skrev Jesper Taxbøl <jesper at taxboel.dk>:

> Hi ,
>
> I am working on a project where I use a mpegtsmux component to mux audio
> data into a ts file. This has worked fine for a while now.
>
> gst-launch-1.0 \
>     mpegtsmux name=mux ! filesink location=test.ts \
>     audiotestsrc is-live=true ! avenc_aac ! mux.
>
> But I am experiencing some strange behaviour with some sensors in my
> application and would like to be able to debug this behaviour in the
> context of the audio track.
>
> I would therefore like to add an extra data track in the tsmuxer to debug
> in the context of the audio. Note that the extra data will arrive randomly
> with no guranteed interval.
>
> I was thinking about using a structure like this to achieve the goal.
>
> gst-launch-1.0 \
>     mpegtsmux name=mux ! filesink location=test.ts \
>     audiotestsrc is-live=true ! avenc_aac ! mux. \
>     udpsrc port=9001 ! meta/x-klv ! mux.
>
> The idea would be that I would use a UDP src as input for said data,
> because I can pipe stdout from my main app into the stream. I would also be
> able to inject other interresting sources into extra tracks if needed.
>
> This works conceptually, but I have run into a problem. It seems that the
> mpegtsmuxer stalls if there is not sent data on the UDP inputs.
>
> I am therefore wondering if the TS muxer need a "heartbeat" on each input,
> and more importantly, if there is a way to disable this need so I can just
> inject when data arrives.
>
> I must note that the output TS file is only used internally in this
> project, so I have no need to conform with extenal standards. I just need
> some debug data for my application.
>
> Kind regards
>
> Jesper
>
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