[FFmpeg-trac] #4319(avcodec:new): VC1 decoding artifacts

[FFmpeg]

#4319: VC1 decoding artifacts
----------------------------------+--------------------------------------
             Reporter:  11rcombs  |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avcodec   |                  Version:  git-master
             Keywords:  vc1       |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 [http://puu.sh/g5d1g/5c540dce06.mkv This sample file] (a clip of a 1080i
 BD remux) produces block artifacts in the VC1 decoder, accompanied by
 "Overriding invalid mquant 0" errors.
 {{{
 $ ffplay http://puu.sh/g5d1g/5c540dce06.mkv
 ffplay version N-69975-g28bf05e Copyright (c) 2003-2015 the FFmpeg
 developers
   built with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM
 3.5svn)
   configuration: --extra-cflags='-march=native' --enable-optimizations
 --disable-stripping --enable-debug --enable-libx265 --enable-gpl --enable-
 libopus --enable-version3 --enable-nonfree --enable-postproc --enable-
 libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-gnutls --enable-libtheora --enable-libvorbis --enable-libvpx
 --enable-libx264 --enable-libxvid --prefix=/usr/local --enable-static
 --enable-shared --enable-avresample --enable-vda --enable-opencl --enable-
 libzvbi --cc=clang --disable-indev=avfoundation
   libavutil      54. 19.100 / 54. 19.100
   libavcodec     56. 25.100 / 56. 25.100
   libavformat    56. 23.100 / 56. 23.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 11.100 /  5. 11.100
   libavresample   2.  1.  0 /  2.  1.  0
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 [matroska,webm @ 0x7fbf6181ba00] Could not find codec parameters for
 stream 2 (Subtitle: hdmv_pgs_subtitle): unspecified size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 [matroska,webm @ 0x7fbf6181ba00] Could not find codec parameters for
 stream 3 (Subtitle: hdmv_pgs_subtitle): unspecified size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Input #0, matroska,webm, from 'http://puu.sh/g5d1g/5c540dce06.mkv':
   Metadata:
     title           : Wild.Canada.2014.E01.BluRay.Remux.1080i.VC-1.DTS-
 HD.MA.5.1-BMF
     encoder         : libebml v1.3.1 + libmatroska v1.4.2
     creation_time   : 2015-02-20 17:19:59
   Duration: 00:00:24.03, start: 0.000000, bitrate: 17965 kb/s
     Chapter #0:0: start 0.000000, end 24.033000
     Metadata:
       title           : Chapter 01
     Stream #0:0: Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p,
 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc
 (default)
     Metadata:
       title           : VC-1 Video /  22903 kbps / 1080i / 29.970 fps /
 16:9 / Advanced Profile 3
     Stream #0:1(eng): Audio: dts (DTS-HD MA), 48000 Hz, 5.1(side), fltp,
 1536 kb/s (default)
     Metadata:
       title           : DTS-HD Master Audio / 5.1 / 48 kHz / 2001 kbps /
 16-bit
     Stream #0:2(eng): Subtitle: hdmv_pgs_subtitle
     Stream #0:3(fre): Subtitle: hdmv_pgs_subtitle
 [vc1 @ 0x7fbf61816c00] Overriding invalid mquant 0
     Last message repeated 8 times
   34.37 A-V:  0.157 fd= 309 aq=    0KB vq=    0KB sq=    0B f=0/0
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4319>
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