Opened 6 years ago

Closed 6 years ago

#2813 closed defect (fixed)

KMVC decoding artefacts http://multimedia.cx/samples/V-codecs/KMVC/baseball1.avi

Reported by: wohe Owned by:
Priority: important Component: avcodec
Version: git-master Keywords: KMVC regression
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

Summary of the bug:
How to reproduce:
Playback of http://multimedia.cx/samples/V-codecs/KMVC/baseball1.avi produces artefacts at the bottom. An FFmpeg version from 2007 doesn't show the problem.

Change History (2)

comment:1 Changed 6 years ago by cehoyos

  • Component changed from undetermined to avcodec
  • Keywords regression added
  • Priority changed from normal to important
  • Reproduced by developer set
  • Status changed from new to open
  • Version changed from 2.0 to git-master

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%

comment:2 Changed 6 years ago by michael

  • Resolution set to fixed
  • Status changed from open to closed
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