[FFmpeg-trac] #208(undetermined:new): png 4bpp file decodes incorrectly

FFmpeg trac at avcodec.org
Mon May 16 16:59:01 CEST 2011


#208: png 4bpp file decodes incorrectly
--------------------------+--------------------------
 Reporter:  ami_stuff     |        Type:  defect
   Status:  new           |    Priority:  normal
Component:  undetermined  |     Version:  unspecified
 Keywords:                |  Blocked By:
 Blocking:                |  Reproduced:  0
 Analyzed:  0             |
--------------------------+--------------------------
 This may be the same problem like with ticket 172, but now with 4bpp png
 file.

 The same problem happens with 4bpp grayscale.

 {{{
 C:\>ffmpeg -i Test_4bpp.png
 ffmpeg version git-N-29946-g27614b1, Copyright (c) 2000-2011 the FFmpeg
 develope
 rs
   built on May 15 2011 14:55:24 with gcc 4.5.3
   configuration: --enable-gpl --enable-version3 --enable-memalign-hack
 --enable-
 runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r
 --enable-libo
 pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-
 libgsm --
 enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-
 libschroedinger
  --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx
 --enabl
 e-libx264 --enable-libxavs --enable-libxvid --enable-zlib --pkg-config
 =pkg-confi
 g
   libavutil    51.  2. 1 / 51.  2. 1
   libavcodec   53.  5. 0 / 53.  5. 0
   libavformat  53.  0. 3 / 53.  0. 3
   libavdevice  53.  0. 0 / 53.  0. 0
   libavfilter   2.  5. 0 /  2.  5. 0
   libswscale    0. 14. 0 /  0. 14. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 Input #0, image2, from 'Test_4bpp.png':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0.0: Video: png, pal8, 1024x768, 25 tbr, 25 tbn, 25 tbc
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/208>
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