[Bug 784318] [gstreamer-vaapi-master][SKL/APL/KBL] 13 vaapiencode_h264 subcases failed on SKL/APL/KBL

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=784318

--- Comment #1 from Hyunjun Ko <zzoon at igalia.com> ---
I suspect a regression in the driver regarding quality level.

Current default of quality level is 4 and it results in poor quality.
If I set 1(the highest quality) to quality-level in vaapih264enc, its quality
gets better. But still not statisfied the PASS standard.

And I revert the commit 481ec15[1] in the driver, the quality is much better to
get passed enough.

IMO, someone in the intel driver should look into this.

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