[Bug 673794] rtprawdepay and gigabit ethernet

GStreamer (bugzilla.gnome.org) bugzilla at gnome.org
Thu Apr 12 03:19:38 PDT 2012


https://bugzilla.gnome.org/show_bug.cgi?id=673794
  GStreamer | gstreamer (core) | 0.11.x

--- Comment #7 from kwisp <kwispost at gmail.com> 2012-04-12 10:19:35 UTC ---
As I say set property udpsrc 'buffer-size' to maximum value does not completely
solve the problem. But I set system net buffer size via sysctl -w
[net.rmem_max, wmem_max, rmem_default, wmem_default] to 1524288. (It is
abnormally net buffer size to my mind.) And it works "normally", with small
black lines sometimes take place(about 1 times per 2-3 second)... I want more
smooth video.

CPU(Intel Atom 1,6GHz) load with video 1024x768, 25fps is about 90% :(
As I wrote - on fast ethernet maximum CPU load(Inte Atom 1,6GHz) with video
1024x768, 12fps is 25-30%

It is very interesting.
If we set on reciever side --gst-debug=basertpdepayloader:5, this(see 'bad' and
'very bad' attachment) problem take place even on Intel i7 CPU based machine.
And there are no problem if we set abnormally net buffer size to 1524288. But
without --gst-debug=basertpdepayloader:5 Intel i7 CPU based machine works fine
with 131071 net buffer size.

I think - some bug take place in (udpsrc or rtpvrawdepay) on the speed, that
1Gb ethernet set.

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