[FFmpeg-trac] #1303(undetermined:new): mpeg4enc: crash with 1x1 resolution

FFmpeg trac at avcodec.org
Sun May 13 17:46:27 CEST 2012


#1303: mpeg4enc: crash with 1x1 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
-------------------------------------+-------------------------------------
 while experimenting with wmv encoder I have found out that it's possible
 to crash all mpeg-based encoders (wmv1/2/msmpeg4v2/mpeg1video/mpeg2video
 etc.) with input which have 1x1 resolution (or 2x1, 1x2 - more I didn't
 test)

 {{{
 (gdb) r -i 1.avi -vcodec msmpeg4 -f null -
 The program being debugged has been started already.
 Start it from the beginning? (y or n) y

 Starting program: d:\mingw\msys\1.0\ffmpeg-head-23fba3e\ffmpeg_g.exe -i
 1.avi -v
 codec msmpeg4 -f null -
 [New Thread 3096.0xd3c]
 ffmpeg version 0.10.2.git-23fba3e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May  5 2012 19:57:06 with gcc 4.6.1
   configuration: --disable-ffprobe --enable-gpl
   libavutil      51. 49.100 / 51. 49.100
   libavcodec     54. 19.100 / 54. 19.100
   libavformat    54.  4.100 / 54.  4.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 72.104 /  2. 72.104
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 11.100 /  0. 11.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, avi, from '1.avi':
   Duration: 00:00:00.10, start: 0.000000, bitrate: 663 kb/s
     Stream #0:0: Video: cinepak (cvid / 0x64697663), yuv420p, 1x1, 10 tbr,
 10 tb
 n, 10 tbc
 [buffer @ 03b41fc0] w:1 h:1 pixfmt:yuv420p tb:1/1000000 sar:0/1
 sws_param:flags=
 2
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf54.4.100
     Stream #0:0: Video: msmpeg4, yuv420p, 1x1, q=2-31, 200 kb/s, 90k tbn,
 10 tbc

 Stream mapping:
   Stream #0:0 -> #0:0 (cinepak -> msmpeg4)
 Press [q] to stop, [?] for help

 Program received signal SIGILL, Illegal instruction.
 0x00a01f00 in ff_emu_edge_core_sse ()
 (gdb) bt
 #0  0x00a01f00 in ff_emu_edge_core_sse ()
 #1  0x03b35ce0 in ?? ()
 Backtrace stopped: previous frame inner to this frame (corrupt stack?)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1303>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list