[FFmpeg-trac] #990(avcodec:new): ffmpeg segfaults in ff_msmpeg4_encode_block with "-r 12 -codec msmpeg4 -mbd rd" options

[FFmpeg]

#990: ffmpeg segfaults in ff_msmpeg4_encode_block with "-r 12 -codec msmpeg4 -mbd
rd" options
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  tom.vercauteren@…                  |                 Priority:  normal
               Status:  new          |                  Version:  0.10
            Component:  avcodec      |               Blocked By:
             Keywords:               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 This is a followup of:
 http://ffmpeg.org/pipermail/libav-user/2012-February/001256.html

 Running
 {{{
 ffmpeg -r 12 -i test-%04d.png -codec msmpeg4 -mbd rd test.avi
 }}}
 on the attached png file leads to a segfault.

 A quick debugging session shows that an array index in
 ff_msmpeg4_encode_block becomes -1 at line 930 of msmpeg4.c (version 0.10)
 http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/msmpeg4.c;h=d37cac9862380a339e64d663ba21c76728751a1a;hb=1b7ff901078064ccd7df3640e0958a344b2c00cb

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/990>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker