[Bug 762509] H.264 decoder stores too many pictures in the DPB before output
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Thu Mar 31 16:18:05 UTC 2016
https://bugzilla.gnome.org/show_bug.cgi?id=762509
--- Comment #3 from Jan Schmidt <thaytan at noraisin.net> ---
I put up a sample stream at
http://noraisin.net/down/h264_constrained_baseline.pcap
You can play it with
gst-launch-1.0 filesrc location=h264_constrained_baseline.pcap ! pcapparse !
application/x-rtp,media=video,clock-rate=90000,encoding-name=H264,payload=96 !
rtph264depay ! vaapisink
If you check the logs, you'll see it that when it gets to the IDR, it has a
large backlog of frames that are all then decoded and output, even though they
could have been output earlier:
0:00:03.551815645 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_h264.c:3255:init_picture: <IDR>
0:00:03.551831009 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 16 (surface 0x04000003)
0:00:03.551851334 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 17 (surface 0x04000004)
0:00:03.551863345 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 18 (surface 0x04000005)
0:00:03.551873942 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 19 (surface 0x04000006)
0:00:03.551885331 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 20 (surface 0x04000007)
0:00:03.551895753 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 21 (surface 0x04000008)
0:00:03.551906464 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 22 (surface 0x04000009)
0:00:03.551916365 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 23 (surface 0x0400000a)
0:00:03.551926310 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:376:push_frame: push frame 24 (surface 0x0400000b)
0:00:03.551934691 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_h264.c:1893:init_picture_poc_0: decode picture order count type
0
0:00:03.551942149 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_h264.c:4128:decode_slice: slice (29599 bytes)
0:00:03.551993820 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_h264.c:2147:init_picture_refs_pic_num: decode picture numbers
0:00:03.551999397 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_h264.c:2826:exec_picture_refs_modification: execute
ref_pic_list_modification()
0:00:03.552005130 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder_objects.c:262:gst_vaapi_picture_decode: decode picture
0x0400000c
0:00:03.552156281 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 16 (surface 0x04000003)
0:00:03.552198621 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 17 (surface 0x04000004)
0:00:03.552208102 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 18 (surface 0x04000005)
0:00:03.552223381 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 19 (surface 0x04000006)
0:00:03.552235232 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 20 (surface 0x04000007)
0:00:03.552248771 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 21 (surface 0x04000008)
0:00:03.552258471 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 22 (surface 0x04000009)
0:00:03.552267505 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 23 (surface 0x0400000a)
0:00:03.552276886 4169 0xc520f0 DEBUG vaapi
gstvaapidecoder.c:397:pop_frame: pop frame 24 (surface 0x0400000b)
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