[Bug 768132] Reusing a (preview) GESPipeline with new clips is not possible

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=768132

Mathieu Duponchelle <mduponchelle1 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |mduponchelle1 at gmail.com

--- Comment #2 from Mathieu Duponchelle <mduponchelle1 at gmail.com> ---
I just gave a quick look at the C test case, as thib showed going to NULL and
back to PLAYING is known to work.

The two differences I can spot are:

1. validate will wait for ASYNC_DONE on READY_TO_PAUSED
2. the C test case embeds the sink in a graphical UI, validate does not

I don't think 1. should be relevant here, though it would be better practice to
wait for ASYNC_DONE here before allowing new state changes.

Regarding 2., thibault said the test case worked in pitivi, which does embed
the sink in GTK, so I'm not sure whether that is relevant either.

I would suggest looking at the difference in the logs between both test cases,
possibly with nlecomposition:4 or nlecomposition:5 :)

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