Opened 7 years ago

Closed 7 years ago

Last modified 7 years ago

#1503 closed defect (fixed)

Incorrect H264 decoding

Reported by: cehoyos Owned by:
Priority: normal Component: avcodec
Version: git-master Keywords: h264 videolan
Cc: michael Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

http://trac.videolan.org/vlc/ticket/7009

I will attach 39 H264 frames, six are decoded differently than with the reference decoder (frames 2, 6, 9, 14, 18, 21)

$ ffmpeg -i incorrectdecode.h264
ffmpeg version N-42076-g51d2578 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jun 30 2012 21:45:24 with gcc 4.3.2
  configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame --enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs --enable-libfaac --enable-nonfree
  libavutil      51. 63.100 / 51. 63.100
  libavcodec     54. 31.100 / 54. 31.100
  libavformat    54. 14.100 / 54. 14.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     3.  0.100 /  3.  0.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[h264 @ 0x903a3c0] Estimating duration from bitrate, this may be inaccurate
Input #0, h264, from 'incorrectdecode.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 47.95 fps, 47.95 tbr, 1200k tbn, 95.90 tbc
At least one output file must be specified

Attachments (1)

incorrectdecode.h264 (1.2 MB) - added by cehoyos 7 years ago.

Download all attachments as: .zip

Change History (5)

Changed 7 years ago by cehoyos

comment:1 Changed 7 years ago by michael

Are there supposed to be vissible artifacts (didnt see any on a quick look) or is it needed to compare pixel per pixel to the reference decoder? is this a part of the sample refered to in ticket/7009 ? (the 7009 sample is 404 so i cannot download it but the jpeg there suggests vissible artifacts)

comment:2 Changed 7 years ago by michael

  • Cc michael added

comment:3 Changed 7 years ago by michael

  • Reproduced by developer set
  • Resolution set to fixed
  • Status changed from new to closed

comment:4 Changed 7 years ago by cehoyos

  • Keywords videolan added
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