[Bug 740149] rtspsrc cpu optimization

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740149
  GStreamer | gst-plugins-good | 1.4.4

Eloi BAIL <eloi.bail> changed:

           What    |Removed                     |Added
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                 CC|                            |eloi.bail at savoirfairelinux.
                   |                            |com

--- Comment #6 from Eloi BAIL <eloi.bail at savoirfairelinux.com> 2014-11-19 17:16:24 UTC ---
Thanks for your comments. The use of sleep is definitely not a solution. It was
used for me to understand how we could save some CPU in udpsrc thread.
I added rtpstats module. Having lot of camera (8) lead to packet dropped using
the sleep even increasing buffer sizes.So definitely this is not a solution.

Using same cameras we used libav module. On each camera it consumes around 5%
while it consumes around 12-15% with gstreamer. It also works fine with 8
simultaneous cameras. It proves  that some improvement regarding CPU
consumption in gstreamer.

I have to admit that I have issues to investigate gstreamer cpu issues.
Profilers so far did not point to something relevant. As udpsrc thread is the
major consumer, I should investigate it. Any help or advice would be helpful.

We have to find a solution soon so it looks like we will use libav if we don't
have significant improvement.

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