[Bug 796727] New: av1enc: fails to emits buffers in time (on lowend systems)

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796727

            Bug ID: 796727
           Summary: av1enc: fails to emits buffers in time (on lowend
                    systems)
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: g.ottinger at gmx.at
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

On my low end system (Celeron G3930, 4GB Ram, Sata SSD, Ubuntu 18.04)

i expirience problems when using av1enc.


gst-launch-1.0 videotestsrc num-buffers=1 ! av1enc cpu-used=2 ! webmmux !
filesink location=out.webm

Fails, meaning a corrupt out.webm (with 315 bytes size) is created. 

If I increase num-buffers - I get to the point (num-buffers=19) where things
start working.

gst-launch-1.0 videotestsrc num-buffers=19 ! av1enc cpu-used=2 ! webmmux !
filesink location=out.webm

Where the produced out.webm holds a single frame.

num-buffers=20 -> results in two frames and so on 

It seems that the first 18 frames don't make it on time on my system.

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