[FFmpeg-trac] #1855(undetermined:new): snow: fail with decode of 2x2 resolution
FFmpeg
trac at avcodec.org
Sat Oct 27 19:17:20 CEST 2012
#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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