[Webkit-unassigned] [Bug 251017] [GStreamer] VA-API (GstVA) hardware-accelerated video decoding playback above 1080p resolution on YouTube in VP9 is very slow and stutters

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=251017

--- Comment #18 from Jeff Fortin <nekohayo at gmail.com> ---
Created attachment 464655

  --> https://bugs.webkit.org/attachment.cgi?id=464655&action=review

debug output from the gst-play command

Unlike the "GStreamer + flatpaked Epiphany/WebKitGTK" testing nightmare where it is impossible to get logs to be written to disk, here are the logs / dot file from this command:

GST_PLUGIN_FEATURE_RANK=vavp9dec:MAX  GST_DEBUG="3,webkit*:6" GST_DEBUG_FILE=/home/my_user/Downloads/foobar_gstplay/gst.log GST_DEBUG_DUMP_DOT_DIR=/home/my_user/Downloads/foobar_gstplay gst-play-1.0 --videosink glimagesink 4k_hdr_sample.webm

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