[FFmpeg-trac] #1506(undetermined:new): sgi fails to decode

[FFmpeg]

#1506: sgi fails to decode
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 http://www.datafilehost.com/download-a959c795.html

 attached file fails to decode with ffmpeg because of this check in
 "libavcodec/sgidec.c":

 {{{
     for (z = 0; z < s->depth; z++) {
         dest_row = out_buf;
         for (y = 0; y < s->height; y++) {
             dest_row -= s->linesize;
             start_offset = bytestream2_get_be32(&g_table);
             bytestream2_seek(&s->g, start_offset, SEEK_SET);
             if (expand_rle_row(s, dest_row + z, dest_row +
 FFABS(s->linesize),
                           s->depth) != s->width) {
            //  return AVERROR_INVALIDDATA;
             }
         }
     }
 }}}

 decodes correctly with every image viewer I have tested.

 {{{
 C:\>ffmpeg -i Test-2.sgi out.bmp
 ffmpeg version N-42089-g64b2593 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Jul  1 2012 02:22:20 with gcc 4.5.0 20100414 (Fedora MinGW
 4.5.0-1.fc
 14)
   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      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
 Input #0, image2, from 'Test-2.sgi':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: sgi, rgb24, 1024x768, 25 tbr, 25 tbn, 25 tbc
 [graph 0 input from stream 0:0 @ 0x1e21440] w:1024 h:768 pixfmt:rgb24
 tb:1/25 fr
 :25/1 sar:0/1 sws_param:flags=2
 [output stream 0:0 @ 0x1e22c80] No opaque field provided
 [auto-inserted scaler 0 @ 0x1e22500] w:1024 h:768 fmt:rgb24 sar:0/1 ->
 w:1024 h:
 768 fmt:bgr24 sar:0/1 flags:0x4
 Output #0, image2, to 'out.bmp':
   Metadata:
     encoder         : Lavf54.14.100
     Stream #0:0: Video: bmp, bgr24, 1024x768, q=2-31, 200 kb/s, 90k tbn,
 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (sgi -> bmp)
 Press [q] to stop, [?] for help
 Error while decoding stream #0:0: Invalid data found when processing input
 frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=
 0.0kbits/
 s
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead nan%
 Output file is empty, nothing was encoded (check -ss / -t / -frames
 parameters i
 f used)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1506>
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