[Bug 788025] New: vaapih264enc leaks 1-4 frames of memory

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=788025

            Bug ID: 788025
           Summary: vaapih264enc leaks 1-4 frames of memory
    Classification: Platform
           Product: GStreamer
           Version: 1.12.2
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: hchapman-gnomebugzilla at 3gfp.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

Created attachment 360228
  --> https://bugzilla.gnome.org/attachment.cgi?id=360228&action=edit
gstreamer pipeline

GStreamer 1.12.2
Yocto Pyro 2.3

We have an application using the attached pipeline. We make very frequent
recordings and have noticed a rapid leak of memory. Every time we start and
stop a recording (encoding of captured video), we lose 1-4 frames of memory.
The `pmap` command reports the memory buffers to be frame sized (12MB for a 4K
frame) and belonging to /dev/dri/renderD128. After about 500 recordings, over 7
GB of memory is gone. 

I have source for everything, but am unsure of how to proceed.

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