[FFmpeg-trac] #2813(avcodec:open): KMVC decoding artefacts http://multimedia.cx/samples/V-codecs/KMVC/baseball1.avi

[FFmpeg]

#2813: KMVC decoding artefacts
http://multimedia.cx/samples/V-codecs/KMVC/baseball1.avi
-------------------------------------+-------------------------------------
             Reporter:  wohe         |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  KMVC         |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  undetermined => avcodec
 * priority:  normal => important
 * version:  2.0 => git-master
 * keywords:  KMVC => KMVC regression


Comment:

 For future tickets: Please always provide a failing ffmpeg command line
 together with the complete, uncut console output.

 Regression since 70b5583.

 {{{
 $ ffmpeg -i baseball1.avi -qscale 2 out.avi
 ffmpeg version N-54992-g63c0113 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jul 28 2013 03:47:03 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 40.100 / 52. 40.100
   libavcodec     55. 19.100 / 55. 19.100
   libavformat    55. 12.102 / 55. 12.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 81.103 /  3. 81.103
   libswscale      2.  4.100 /  2.  4.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 Guessed Channel Layout for  Input Stream #0.1 : mono
 Input #0, avi, from 'baseball1.avi':
   Duration: 00:00:15.76, start: 0.000000, bitrate: 2494 kb/s
     Stream #0:0: Video: kmvc (KMVC / 0x43564D4B), pal8, 320x200, 25 tbr,
 25 tbn, 25 tbc
     Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 22050 Hz, mono,
 u8, 176 kb/s
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf55.12.102
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x200,
 q=2-31, 200 kb/s, 25 tbn, 25 tbc
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 22050 Hz, mono, fltp,
 96 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (kmvc -> mpeg4)
   Stream #0:1 -> #0:1 (pcm_u8 -> ac3)
 Press [q] to stop, [?] for help
 [kmvc @ 0x1aed360] Invalid MV
     Last message repeated 318 times
 frame=  394 fps=0.0 q=2.0 Lsize=    2390kB time=00:00:15.81
 bitrate=1238.4kbits/s
 video:2181kB audio:185kB subtitle:0 global headers:0kB muxing overhead
 1.031435%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2813#comment:1>
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