The mentioned upstream patch was included in the 1.15.2 release and
jammy and focal are unaffected; bionic does not have this patch in
1.14.5-0ubuntu1~18.04.3
** Package changed: gstreamer1.0 (Ubuntu) => gst-plugins-base1.0
(Ubuntu)
** Also affects: gst-plugins-base1.0 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: gst-plugins-base1.0 (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1962133
Title:
Intermittent very low fps(sometimes zero) with few specific h264 and
h265 RTSP input streams sources when used with gst-v4l2 based
gstreamer-1.0(version gst-1.14.5) decode pipeline
Status in Gstreamer1.0:
Unknown
Status in gst-plugins-base1.0 package in Ubuntu:
Fix Released
Status in gst-plugins-base1.0 source package in Bionic:
New
Bug description:
Few specific h264 and h265 RTSP input streams sources when used with
nvidia specific gst-v4l2 based gstreamer-1.0 (version gst-1.14 and
ubuntu-18.04) decode pipeline intermittently yields very low fps (in
the range of [~0/1 fps]).
Issue seems caused by the gst_video_decoder_drain_out function
erroneously getting called inside gst_video_decoder_chain_forward
function.
Required changes to fix the issue seems available with gst-1.16 and to
resolve the issue need to backport the relevant OSS fixes from
gst-1.16 to gst-1.14 on ubuntu-18.04.
The mentioned issue was reported on with:
https://bugzilla.gnome.org/show_bug.cgi?id=796771
Corresponding fix was incorporated with below:
https://github.com/GStreamer/gst-plugins-base/commit/62cb08404b9bd055c45cc1d5b71141e927ad748a
We need to backport above fix on top of gst-1.14.5 on ubuntu-18.04 in
order to have out-of-box fix available with default gstreamer-1.0
version 1.14 on ubuntu-18.04
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