[Bug 796513] vaapih265dec: segfault when it starts to decode a delta frame

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

Julien Isorce <***@gmail.com> changed:

What |Removed |Added
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CC| |***@gmail.com

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

--- Comment #1 from Víctor Manuel Jáquez Leal <***@igalia.com> ---
would be great if you make a stream that starts with a delta frame thus we
could replicate the crash easily.

The problem might be in gstreamer-vaapi or in the driver. Not sure yet.

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

--- Comment #2 from James Stevenson <***@stev.org> ---
Created attachment 372595
--> https://bugzilla.gnome.org/attachment.cgi?id=372595&action=edit
raw byte-stream h265 data that crashes decoder.


sure I just captured one with the following.

gst-launch-1.0 -v rtspsrc location=<redacted> ! rtph265depay ! h265parse !
video/x-h265, stream-format=byte-stream ! identity silent=false ! filesink
location=delta-raw.h265

Then confirmed the crash agin with

gst-launch-1.0 filesrc location=delta-raw.h265 ! h265parse ! decodebin !
fakesink
and
gst-launch-1.0 filesrc location=delta-raw.h265 ! h265parse ! vaapih265dec !
fakesink

Some vainfo output may also be useful if its a driver / hw specific

vainfo: VA-API version: 1.1 (libva 2.1.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Skylake - 2.1.0
vainfo: Supported profile and entrypoints

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

Víctor Manuel Jáquez Leal <***@igalia.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Summary|vaapih265dec |vaapih265dec: segfault when
| |it starts to decode a delta
| |frame

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

James Stevenson <***@stev.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |***@stev.org

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

--- Comment #3 from Víctor Manuel Jáquez Leal <***@igalia.com> ---
Hint: I guess the solution is something similar to this patch for H264

https://cgit.freedesktop.org/gstreamer/gstreamer-vaapi/commit/?id=b4e92084

decoder: h264: skip all pictures prior the first I-frame.

Don't try to decode pictures until the first I-frame is received within
the currently active sequence. There is no point is decoding and then
displaying frames with artifacts.

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796513

GStreamer system administrator <***@gstreamer.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |OBSOLETE

--- Comment #4 from GStreamer system administrator <***@gstreamer.net> ---
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