[FFmpeg-trac] #3717(avcodec:open): vp9 artifacts

FFmpeg trac at avcodec.org
Wed Jun 11 22:02:49 CEST 2014


#3717: vp9 artifacts
---------------------------------------+-----------------------------------
             Reporter:  kyh96403       |                    Owner:
                 Type:  defect         |                   Status:  open
             Priority:  normal         |                Component:  avcodec
              Version:  git-master     |               Resolution:
             Keywords:  vp9 artifacts  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  1
Analyzed by developer:  0              |
---------------------------------------+-----------------------------------
Changes (by ubitux):

 * status:  new => open
 * reproduced:  0 => 1


Comment:

 Green artifact visible with:

 {{{
 % ./ffplay -ss 24 -i /tmp/la\ la\ la.webm
 ffplay version N-63900-g0180c46 Copyright (c) 2003-2014 the FFmpeg
 developers
   built on Jun 11 2014 21:33:53 with gcc 4.9.0 (GCC) 20140521 (prerelease)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-libvpx
 --enable-x11grab --samples=/home/ubitux/fate-samples --assert-level=2
 --cc='ccache cc'
   libavutil      52. 89.100 / 52. 89.100
   libavcodec     55. 66.100 / 55. 66.100
   libavformat    55. 43.100 / 55. 43.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  8.100 /  4.  8.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, matroska,webm, from '/tmp/la la la.webm':q=    0B f=0/0
   Metadata:
     encoder         : google
   Duration: 00:03:30.28, start: 0.000000, bitrate: 1868 kb/s
     Stream #0:0(eng): Video: vp9, yuv420p, 1920x1080, SAR 1:1 DAR 16:9, 25
 fps, 25 tbr, 1k tbn, 1k tbc (default)
   23.80 M-V:  0.000 fd=   0 aq=    0KB vq=   42KB sq=    0B f=0/0
 }}}

 Problem seems to be in ASM (not reproducible with {{{-cpuflags none}}}),
 in particular {{{init_dc_ipred(TX_4X4,    4, ssse3);}}}.

 It would be really nice if you could upload the sample on our FTP.
 Mentioning our bugreport page (http://ffmpeg.org/bugreports.html):

 > Furthermore movie files uploaded to services like megaupload, rapidshare
 or any other similar service will be ignored. We are not willing to spend
 our time fighting with this ridiculous, bloated and spam-filled crap.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3717#comment:1>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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