[FFmpeg-trac] #2240(undetermined:new): xvid: visible artefects

[FFmpeg]

#2240: xvid: visible artefects
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 there are visible artefacts on the car at the end of the video

 the file decodes ok with xvid codec

 attached patch "fixes" the problem

 http://samples.mplayerhq.hu/V-codecs/MPEG4/color16.avi

 {{{
 C:\>ffmpeg -i color16.avi out.avi
 ffmpeg version N-48610-gb23aff6 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan  8 2013 02:37:29 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. 13.100 / 52. 13.100
   libavcodec     54. 86.100 / 54. 86.100
   libavformat    54. 59.106 / 54. 59.106
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 32.100 /  3. 32.100
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, avi, from 'color16.avi':
   Duration: 00:00:04.68, start: 0.000000, bitrate: 2583 kb/s
     Stream #0:0: Video: mpeg4 (XVID / 0x44495658), yuv420p, 712x368 [SAR
 1:1 DAR
  89:46], 25 fps, 25 tbr, 25 tbn, 2 tbc
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf54.59.106
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 712x368 [SAR
 1:1 DAR
  89:46], q=2-31, 200 kb/s, 25 tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
 Press [q] to stop, [?] for help
 [mpeg4 @ 0x1eff580] looks like this file was encoded with
 (divx4/(old)xvid/opend
 ivx) -> forcing low_delay flag
 frame=   39 fps=0.0 q=28.6 size=     123kB time=00:00:01.56 bitrate=
 646.0kbits/
 frame=   85 fps=0.0 q=19.2 size=     182kB time=00:00:03.40 bitrate=
 439.5kbits/
 frame=  117 fps= 86 q=21.6 Lsize=     229kB time=00:00:04.68 bitrate=
 400.4kbits
 /s
 video:220kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 3.821809%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2240>
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