[FFmpeg-trac] #1855(undetermined:new): snow: fail with decode of 2x2 resolution

[FFmpeg]

#1855: snow: fail with decode of 2x2 resolution
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 i'm not sure if this is a bug in encoder (missing check for minimal
 supported resolution) or in decoder

 {{{
 C:\>ffmpeg -i 2.avi -vcodec snow -pix_fmt yuv420p -strict -2 out.avi
 ffmpeg version N-45867-g3318d6b Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Oct 23 2012 02:39:33 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      51. 77.100 / 51. 77.100
   libavcodec     54. 68.100 / 54. 68.100
   libavformat    54. 33.100 / 54. 33.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 20.104 /  3. 20.104
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 Input #0, avi, from '2.avi':
   Duration: 00:00:00.10, start: 0.000000, bitrate: 664 kb/s
     Stream #0:0: Video: cinepak (cvid / 0x64697663), yuv420p, 2x2, 10 tbr,
 10 tb
 n, 10 tbc
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf54.33.100
     Stream #0:0: Video: snow (SNOW / 0x574F4E53), yuv420p, 2x2, q=2-31,
 200 kb/s
 , 10 tbn, 10 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (cinepak -> snow)
 Press [q] to stop, [?] for help
 frame=    1 fps=0.0 q=0.0 Lsize=       6kB time=00:00:00.10 bitrate=
 457.0kbits/
 s
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 95100.000000%
 }}}

 {{{
 C:\>ffmpeg -i out.avi out2.avi
 ffmpeg version N-45867-g3318d6b Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Oct 23 2012 02:39:33 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      51. 77.100 / 51. 77.100
   libavcodec     54. 68.100 / 54. 68.100
   libavformat    54. 33.100 / 54. 33.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 20.104 /  3. 20.104
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 [snow @ 0x1edc700] Error s->spatial_decomposition_count is 0
 [avi @ 0x1edbe20] decoding for stream 0 failed
 [avi @ 0x1edbe20] Could not find codec parameters for stream 0 (Video:
 snow (SNO
 W / 0x574F4E53), 2x2): unspecified pixel format
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 out.avi: could not find codec parameters
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1855>
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