Can't get dynamically added sinks to work.

[Stirling Westrup]

Seems like the vaapi issue was one I'd caused by improperly installing our
patches.

Now, thanks to the code in dynamic-tee-vsink.c, I've made some progress in
figuring out what's been going wrong, but I'm still rather puzzled. On
first inspection, my technique is almost identical to that in
dynamic-tee-vsink.c. Sufficiently so that I would have expected my test
code to run. However, by playing around with it, I've discovered some (to
me) surprising things:

If you replace the use of decodebin by a simple videotestsrc (and
consequently eliminate the pad-added callback), the program fails to run.
In fact, it exhibits the same issues my test code does: It only outputs the
first frame of output on the first added sink, newly added sinks don't
appear after that, and removal of sinks fails completely.

However, If I then replace the fakesink with testsink, everything starts
working again. As best I can figure out, this pipeline:

  videotestsrc ! tee ! fakesink

freezes up and stops passing buffers, but without generating any sort of
error. After that, any attempt to add or remove sinks fails to work. I have
no idea why this might be so.




On Wed, May 7, 2014 at 3:31 PM, Sebastian Dröge
<sebastian at centricular.com>wrote:

> On Mi, 2014-05-07 at 12:36 -0400, Stirling Westrup wrote:
> > Hmm. I uninstalled out vaapi patches, and now the above code runs.
>
> Best to report that as a bug against gst-vaapi. Would be rather worrying
> if it doesn't work properly in this scenario.
>
> --
> Sebastian Dröge, Centricular Ltd - http://www.centricular.com
> Expertise, Straight from the Source
>



-- 
Stirling Westrup
Programmer, Entrepreneur.
https://www.linkedin.com/e/fpf/77228
http://www.linkedin.com/in/swestrup
http://technaut.livejournal.com
http://sourceforge.net/users/stirlingwestrup
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