[Bug 785216] New: vaapivp8enc bitrate setting works only in certain range

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785216

            Bug ID: 785216
           Summary: vaapivp8enc bitrate setting works only in certain
                    range
    Classification: Platform
           Product: GStreamer
           Version: 1.12.x
                OS: Mac OS
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: marcin at saepia.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

I am using GStreamer 1.12.0 on ubuntu zesty, compiled from sources. CPU is
Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz. Here are versions of other,
potentially important components:

LIBVA_VERSION=1.8.2
INTEL_DRIVER_VERSION=5f479acd6d856c13be18321642eac8e9635b25c9
LIBDRM_VERSION=libdrm-2.4.80

I have found out that setting vaapivp8enc's bitrate parameters makes effect
only within range that is approximately 900-13000. Any value below 900 results
in +/- 900 and anything above 20000 results in +/- 13000 kbit/s.

I have created sample pipeline and I have been monitoring traffic using
iptraf-ng. It was done within Docker container, so there was no other traffic
that might interfere with it. For values within that range the actual traffic
was more less equal to bitrate being set. For lower/higher it was adjusted to
900 or 13000.

gst-launch-1.0 videotestsrc is-live=true !
"video/x-raw,width=1280,height=720,framerate=15/1" ! vaapivp8enc bitrate=...
rate-control=2 ! rtpvp8pay ! udpsink host=localhost port=5001

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.