Opened 4 years ago

Closed 4 years ago

#2539 closed defect (fixed)

indeo 4 artefacts with low quality (keyframes)

Reported by: ami_stuff Owned by:
Priority: normal Component: avcodec
Version: git-master Keywords: indeo4
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

ffmpeg's indeo4 decoder decodes with artefacts files encoded in low quality when keyframes are repeated every 2 frames or more (bigger value - more visible artefacts

C:\>ffmpeg -i 5p_every_20.avi -vcodec msmpeg4v2 out.avi
ffmpeg version N-52725-ge756635 Copyright (c) 2000-2013 the FFmpeg developers
  built on May  4 2013 02:45:38 with gcc 4.5.0 (GCC) 20100414 (Fedora MinGW 4.5.
0-1.fc14)
  configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build --arch=
x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686-pc-min
gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime-cpudetect
--enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -
lwinmm -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snap
shots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/s
napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3
--enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-
libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx
  libavutil      52. 28.100 / 52. 28.100
  libavcodec     55.  7.100 / 55.  7.100
  libavformat    55.  4.101 / 55.  4.101
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 63.101 /  3. 63.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Input #0, avi, from '5p_every_20.avi':
  Duration: 00:00:04.67, start: 0.000000, bitrate: 177 kb/s
    Stream #0:0: Video: indeo4 (IV41 / 0x31345649), yuv410p, 240x180, 15 tbr, 15
 tbn, 15 tbc
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf55.4.101
    Stream #0:0: Video: msmpeg4v2 (MP42 / 0x3234504D), yuv420p, 240x180, q=2-31,
 200 kb/s, 15 tbn, 15 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (indeo4 -> msmpeg4v2)
Press [q] to stop, [?] for help
frame=   49 fps=0.0 q=3.7 size=     121kB time=00:00:03.26 bitrate= 303.0kbits/s
frame=   70 fps=0.0 q=4.0 Lsize=     166kB time=00:00:04.66 bitrate= 290.9kbits/
s
video:158kB audio:0kB subtitle:0 global headers:0kB muxing overhead 4.553662%

Attachments (8)

5p_every_1.avi (152.3 KB) - added by ami_stuff 4 years ago.
5p_every_2.avi (115.9 KB) - added by ami_stuff 4 years ago.
5p_every_3.avi (115.3 KB) - added by ami_stuff 4 years ago.
5p_every_4.avi (105.7 KB) - added by ami_stuff 4 years ago.
5p_every_5.avi (105.8 KB) - added by ami_stuff 4 years ago.
5p_every_10.avi (99.1 KB) - added by ami_stuff 4 years ago.
5p_every_20.avi (100.9 KB) - added by ami_stuff 4 years ago.
5p_every_50.avi (98.2 KB) - added by ami_stuff 4 years ago.

Download all attachments as: .zip

Change History (10)

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

Changed 4 years ago by ami_stuff

comment:1 Changed 4 years ago by cehoyos

  • Component changed from undetermined to avcodec
  • Keywords indeo4 added
  • Reproduced by developer set
  • Status changed from new to open
  • Version changed from unspecified to git-master

comment:2 Changed 4 years ago by cehoyos

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

Fixed by Kostya / Duplicate of ticket #866.

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