[FFmpeg-trac] #5387(avcodec:new): Artefacts decoding svq3

[FFmpeg]

#5387: Artefacts decoding svq3
--------------------------------------+---------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avcodec
                Version:  git-master  |               Keywords:  svq3
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 The sample gt4_tgs2k3.mov in
 https://samples.libav.org/V-codecs/SVQ3/watermark/ shows artefacts after
 13 seconds with FFmpeg, no artefacts with the binary decoder.
 {{{
 $ ffmpeg -nostats -i gt4_tgs2k3.mov -qscale 2 out.avi
 ffmpeg version N-79158-gd5a3578 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 19.100 / 55. 19.100
   libavcodec     57. 32.100 / 57. 32.100
   libavformat    57. 29.101 / 57. 29.101
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 40.102 /  6. 40.102
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x372f3e0] multiple edit list entries, a/v
 desync might occur, patch welcome
 Guessed Channel Layout for  Input Stream #0.1 : stereo
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'gt4_tgs2k3.mov':
   Metadata:
     creation_time   : 2003-09-26 07:47:55
     artist          : GameSpy.com
     artist-eng      : GameSpy.com
     copyright       : GameSpy Industries
     copyright-eng   : GameSpy Industries
   Duration: 00:01:03.13, start: 0.000000, bitrate: 4042 kb/s
     Stream #0:0(eng): Video: svq3 (SVQ3 / 0x33515653), yuvj420p(pc),
 640x480, 3667 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc (default)
     Metadata:
       creation_time   : 2003-09-26 07:47:55
       handler_name    : Apple Alias Data Handler
       encoder         : Sorenson Video 3
     Stream #0:1(eng): Audio: adpcm_ima_qt (ima4 / 0x34616D69), 44100 Hz, 2
 channels, s16p, 352 kb/s (default)
     Metadata:
       creation_time   : 2003-09-26 07:47:55
       handler_name    : Apple Alias Data Handler
     Stream #0:2(eng): Data: none, 1 kb/s (default)
     Metadata:
       creation_time   : 2003-09-26 07:47:55
       handler_name    : Apple Alias Data Handler
 Please use -q:a or -q:v, -qscale is ambiguous
 [swscaler @ 0x3768100] deprecated pixel format used, make sure you did set
 range correctly
 Output #0, avi, to 'out.avi':
   Metadata:
     copyright-eng   : GameSpy Industries
     IART            : GameSpy.com
     artist-eng      : GameSpy.com
     ICOP            : GameSpy Industries
     ISFT            : Lavf57.29.101
     Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 640x480,
 q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc (default)
     Metadata:
       creation_time   : 2003-09-26 07:47:55
       handler_name    : Apple Alias Data Handler
       encoder         : Lavc57.32.100 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
     Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo,
 fltp, 192 kb/s (default)
     Metadata:
       creation_time   : 2003-09-26 07:47:55
       handler_name    : Apple Alias Data Handler
       encoder         : Lavc57.32.100 ac3
 Stream mapping:
   Stream #0:0 -> #0:0 (svq3 (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (adpcm_ima_qt (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 Multiple frames in a packet from stream 1
 [svq3 @ 0x374b540] top block unavailable for requested intra mode at 1 0
 [svq3 @ 0x374b540] ff_h264_check_intra_pred_mode < 0
 [svq3 @ 0x374b540] error while decoding MB 1 0
 Error while decoding stream #0:0: Operation not permitted
 [svq3 @ 0x374b540] error while decoding chroma dc block
 [svq3 @ 0x374b540] error while decoding MB 0 0
 Error while decoding stream #0:0: Operation not permitted
 [svq3 @ 0x374b540] error while decoding chroma dc block
 [svq3 @ 0x374b540] error while decoding MB 0 0
 Error while decoding stream #0:0: Operation not permitted
 [svq3 @ 0x374b540] top block unavailable for requested intra mode at 1 0
 [svq3 @ 0x374b540] ff_h264_check_intra_pred_mode < 0
 [svq3 @ 0x374b540] error while decoding MB 1 0
 Error while decoding stream #0:0: Operation not permitted
 [svq3 @ 0x374b540] luma prediction:184
 [svq3 @ 0x374b540] error while decoding MB 1 0
 Error while decoding stream #0:0: Operation not permitted
 [svq3 @ 0x374b540] top block unavailable for requested intra mode at 1 0
 [svq3 @ 0x374b540] ff_h264_check_intra_pred_mode < 0
 [svq3 @ 0x374b540] error while decoding MB 1 0
 Error while decoding stream #0:0: Operation not permitted
 frame= 1884 fps=329 q=2.0 Lsize=   50455kB time=00:01:03.16
 bitrate=6543.9kbits/s speed=  11x
 video:48880kB audio:1478kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.193616%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5387>
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