[Bug 796513] New: vaapih265dec

[GStreamer (GNOME Bugzilla)]

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

            Bug ID: 796513
           Summary: vaapih265dec
    Classification: Platform
           Product: GStreamer
           Version: 1.14.0
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: james at stev.org
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

vaapih265dec crashes with an assert failure if stream does not start on
keyframe in the i965 driver.

gst-launch-1.0: gen9_mfd.c:649: gen9_hcpd_get_reference_picture_frame_id:
Assertion `0' failed.

#0  0x00007f13ff38fe97 in __GI_raise (sig=sig at entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007f13ff391801 in __GI_abort () at abort.c:79
#2  0x00007f13ff38139a in __assert_fail_base (fmt=0x7f13ff5087d8 "%s%s%s:%u:
%s%sAssertion `%s' failed.\n%n", assertion=assertion at entry=0x7f13be775b4c "0",
file=file at entry=0x7f13be46bdf0 "gen9_mfd.c", line=line at entry=649,
function=function at entry=0x7f13be46c500
"gen9_hcpd_get_reference_picture_frame_id") at assert.c:92
#3  0x00007f13ff381412 in __GI___assert_fail (assertion=0x7f13be775b4c "0",
file=0x7f13be46bdf0 "gen9_mfd.c", line=649, function=0x7f13be46c500
"gen9_hcpd_get_reference_picture_frame_id") at assert.c:101
#4  0x00007f13be334b41 in  () at
/usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
#5  0x00007f13be33649b in  () at
/usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
#6  0x00007f13d471c820 in vaEndPicture () at
/usr/lib/x86_64-linux-gnu/libva.so.2
#7  0x00007f13f0507dd3 in  () at
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#8  0x00007f13f051fb5d in  () at
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#9  0x00007f13f04fa643 in  () at
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#10 0x00007f13f04dec52 in  () at
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#11 0x00007f13fbde4b81 in gst_video_decoder_decode_frame
(decoder=decoder at entry=0x7f13c40761a0, frame=0x55dd7e987df0) at
gstvideodecoder.c:3416
#12 0x00007f13fbded16f in gst_video_decoder_have_frame (decoder=0x7f13c40761a0)
at gstvideodecoder.c:3348
#13 0x00007f13f04dd81a in  () at
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#14 0x00007f13fbde4d43 in gst_video_decoder_parse_available
(dec=dec at entry=0x7f13c40761a0, at_eos=at_eos at entry=0, new_buffer=0,
new_buffer at entry=1) at gstvideodecoder.c:882
#15 0x00007f13fbde770c in gst_video_decoder_chain_forward
(decoder=decoder at entry=0x7f13c40761a0, buf=buf at entry=0x55dd7e987ce0,
at_eos=at_eos at entry=0) at gstvideodecoder.c:2158
#16 0x00007f13fbde7d52 in gst_video_decoder_chain (pad=<optimised out>,
parent=0x7f13c40761a0, buf=0x55dd7e987ce0) at gstvideodecoder.c:2456
#17 0x00007f13fff4146b in gst_pad_chain_data_unchecked (data=0x55dd7e987ce0,
type=4112, pad=0x7f13c8024fa0) at gstpad.c:4279
#18 0x00007f13fff4146b in gst_pad_push_data (pad=pad at entry=0x55dd7e9b7b20,
type=type at entry=4112, data=data at entry=0x55dd7e987ce0) at gstpad.c:4535
#19 0x00007f13fff497a3 in gst_pad_push (pad=pad at entry=0x55dd7e9b7b20,
buffer=buffer at entry=0x55dd7e987ce0) at gstpad.c:4654
#20 0x00007f13fff2f91b in gst_proxy_pad_chain_default (pad=<optimised out>,
parent=<optimised out>, buffer=0x55dd7e987ce0) at gstghostpad.c:127
#21 0x00007f13fff4146b in gst_pad_chain_data_unchecked (data=0x55dd7e987ce0,
type=4112, pad=0x55dd7e9b3970) at gstpad.c:4279
#22 0x00007f13fff4146b in gst_pad_push_data (pad=pad at entry=0x7f13c8024d50,
type=type at entry=4112, data=data at entry=0x55dd7e987ce0) at gstpad.c:4535


Example pipeline I am using. I the identity shows the first frame as a delta
when the crash happens. However if the first frame is a keyframe it will work
correctly deocde and play video.

GST_DEBUG=3 gst-launch-1.0 -v rtspsrc location=<redacted> ! rtph265depay !
h265parse ! identity silent=false ! decodebin ! videoconvert ! xvimagesink

Should the parser not drop data from the stream until a keyframe has passed? I
also tried with "h265parse disable-passthrough=true" to try to enable this.

Same video source under both conditions (keyframe/delta as first frame) works
fine with the avdec_h265 decoder.

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