Gst.parse-launch vs manual pipeline creation

[Krutskikh Ivan]

Hi!

I basically construct pipeline to interact with Ip video cams. A very
simple template:

rtspsrc name=source latency=100 ! rtph264depay ! mpegtsmux name=mux  !
queue !  multisocketsink sync-method=1  name=sink

This one is used for video distribution over http in python. I experienced
both of above problems on it.

2016-06-21 3:04 GMT+03:00 Olivier Crête <olivier.crete at collabora.com>:

> On Mon, 2016-06-20 at 17:04 +0300, Krutskikh Ivan wrote:
> > I use gstreamer 1.8.X with python and gi. For convenience I use
> > Gst.parse-launch() for creating pipelines. But the more I use those
> > approach, I stumble upon issues:
> >
> > 1) Sometimes set_state(Gst.State.NULL) results in gstreamer exception
> > about some elements that should be manually set to NULL state.
> > Sometimes (like on handling EOS message) it works, sometimes it
> > crashes with segmentation fault with my whole multithread app =(. I
> > came up with a workaround for simple pipelines ( no tee's etc.): I
> > set src element to state_null and after that the whole pipeline. This
> > kind of works, but only with straight pipelines.
>
> Are you doing something else than setting the pipeline to PLAYING then
> back to NULL? What is your pipeline?
>
>
> > 2) I cannot re-use my pipeline after it was set to state NULL. That's
> > less of a problem: I can just re-init my pipeline from scratch.
> >
> > Are both of those issues the results of my lazy approach of using
> > Gst.parse-launch() instean of creating pipeline manually? And how can
>
> Normally, parse_launch() should work multiple times, unless you have
> pipelines with sometimes pads like demuxers or decodebin, in that case,
> the "auto-linking" only happens the first time and you need to re-
> create it.
>
> --
> Olivier Crête
> olivier.crete at collabora.com
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>
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