[FFmpeg-trac] #5095(avcodec:new): Many warnings shown when decoding a 4k hevc sample

[FFmpeg]

#5095: Many warnings shown when decoding a 4k hevc sample
--------------------------------------+---------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  minor       |              Component:  avcodec
                Version:  git-master  |               Keywords:  hevc
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/60065
 A Samsung HDR 4k HEVC sample produces many warnings when decoding, heavily
 affecting decoding speed.
 {{{
 $ ffmpeg -threads 1 -i Samsung_SUHD_Picture_Quality\ Demo_Nano_Crystal\
 Display_UK-Version_cut.mp4 -f null -vframes 7 -
 ffmpeg version N-77376-gaefcc77 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 11.100 / 55. 11.100
   libavcodec     57. 18.100 / 57. 18.100
   libavformat    57. 20.100 / 57. 20.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 21.100 /  6. 21.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Samsung_SUHD_Picture_Quality
 Demo_Nano_Crystal Display_UK-Version_cut.mp4':
   Metadata:
     major_brand     : hvc1
     minor_version   : 0
     compatible_brands: isomhvc1
     creation_time   : 2015-07-11 03:36:53
   Duration: 00:01:55.35, start: 0.000000, bitrate: 177 kb/s
     Stream #0:0(eng): Data: none (mp4s / 0x7334706D), 224 kb/s (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
     Stream #0:1(eng): Data: none (mp4s / 0x7334706D), 240 kb/s (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
     Stream #0:2(eng): Video: hevc (Main 10) (hvc1 / 0x31637668),
 yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9],
 49999 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
       encoder         : HEVC Coding
     Stream #0:3(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 383 kb/s (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
 Output #0, null, to 'pipe:':
   Metadata:
     major_brand     : hvc1
     minor_version   : 0
     compatible_brands: isomhvc1
     encoder         : Lavf57.20.100
     Stream #0:0(eng): Video: wrapped_avframe, yuv420p10le, 3840x2160 [SAR
 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
       encoder         : Lavc57.18.100 wrapped_avframe
     Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
 (default)
     Metadata:
       creation_time   : 2015-07-11 03:36:53
       encoder         : Lavc57.18.100 pcm_s16le
 Stream mapping:
   Stream #0:2 -> #0:0 (hevc (native) -> wrapped_avframe (native))
   Stream #0:3 -> #0:1 (aac (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [hevc @ 0x2939620] Invalid NAL unit 0, skipping.
     Last message repeated 207805 times
 [hevc @ 0x2939620] Invalid NAL unit 0, skipping..00 bitrate=N/A speed=
 0x
     Last message repeated 104141 times
 [hevc @ 0x2939620] Invalid NAL unit 0, skipping.0.21 bitrate=N/A
 speed=0.206x
     Last message repeated 156212 times
 [hevc @ 0x2939620] Invalid NAL unit 0, skipping.0.30 bitrate=N/A
 speed=0.194x
     Last message repeated 94980 times
 frame=    7 fps=3.7 q=-0.0 Lsize=N/A time=00:00:00.36 bitrate=N/A
 speed=0.195x
 video:3kB audio:40kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}
 Decoding is bitexact wrt the reference decoder.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5095>
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