[Bug 793686] New: Unneeded BLIT operation when target is encoder (ex: vaapih264enc)

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Wed Feb 21 09:32:29 UTC 2018


https://bugzilla.gnome.org/show_bug.cgi?id=793686

            Bug ID: 793686
           Summary: Unneeded BLIT operation when target is encoder (ex:
                    vaapih264enc)
    Classification: Platform
           Product: GStreamer
           Version: 1.12.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: philippe.lecluse at intel.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

This operation 
12.4/gstreamer-vaapi-1.12.4/gst-libs/gst/vaapi/gstvaapifilter.c: 
pipeline_param->output_background_color = 0xff000000;
force BLIT usage (visible with Vtune or intel_gpu_top) - or this is only needed
when target is Display... useless when target is encoder (where Alpha is
ignored)

This cause extra HW resource usage that can be prevented as this operation is
not needed in encoder cases

Can we make this output_background_color configurable (or skip this operation
in encode pipeline) ?

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