[Bug 787818] New: vaapi: regression: Failure of dash in gst-validate

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=787818

            Bug ID: 787818
           Summary: vaapi: regression: Failure of dash in gst-validate
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: zzoon at igalia.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

This is regression introduced by commit 2eb2b26a.

Simple reproduced step: 
gst-play-1.0 exMPD_BIP_TC1.mpd

There's g_critical error showing, which leads to a failure of gst-validate.

** (gst-play-1.0:32221): CRITICAL **: gst_h264_sps_copy: assertion 'dst_sps !=
NULL' failed

Callstack

#0  0x00007ffff6c0bde1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffff6c0d1ed in g_logv () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6c0d34f in g_log () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffc9f632ea in gst_h264_sps_copy (dst_sps=<optimised out>,
src_sps=0x7fffbc006b00) at gsth264parser.c:364
#4  0x00007fffc9f63375 in gst_h264_parser_parse_sps (nalparser=0x0,
nalu=nalu at entry=0x7fffbc006ad0, sps=sps at entry=0x7fffbc006b00,
parse_vui_params=parse_vui_params at entry=1) at gsth264parser.c:1477
#5  0x00007fffc9a88c3e in parse_sps (decoder=decoder at entry=0x7fffc4091c00,
unit=<optimised out>) at gstvaapidecoder_h264.c:1767
#6  0x00007fffc9a88f23 in gst_vaapi_decoder_h264_decode_codec_data
(base_decoder=0x7fffc4091c00, buf=0x7fffd0024e60 "\001B\300\036\377",
<incomplete sequence \341>, buf_size=52) at gstvaapidecoder_h264.c:4412
#7  0x00007fffc9a861f9 in gst_vaapi_decoder_decode_codec_data
(decoder=0x7fffc4091c00) at gstvaapidecoder.c:1132
#8  0x00007fffc9a8633f in gst_vaapi_decoder_update_caps
(decoder=0x7fffc4091c00, caps=caps at entry=0x7fffbc0022d0) at
gstvaapidecoder.c:1197
#9  0x00007fffc9a686c6 in gst_vaapidecode_reset
(decode=decode at entry=0x7fffc407ad50, caps=0x7fffbc0022d0,
force_reset=force_reset at entry=0) at gstvaapidecode.c:981
#10 0x00007fffc9a6a8c7 in gst_vaapidecode_set_format (vdec=0x7fffc407ad50,
state=<optimised out>) at gstvaapidecode.c:1095
#11 0x00007ffff74a5244 in gst_video_decoder_setcaps (caps=0x7fffbc0022d0,
decoder=0x7fffc407ad50) at gstvideodecoder.c:701
#12 0x00007ffff74a5244 in gst_video_decoder_sink_event_default
(decoder=0x7fffc407ad50, event=0x7fffc40446e0) at gstvideodecoder.c:1121

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