[FFmpeg-trac] #833(avcodec:open): crash with png (gray) to bmp (gray) conversion

[FFmpeg]

#833: crash with png (gray) to bmp (gray) conversion
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  bmp crash    |               Blocked By:
  SIGSEGV                            |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by ami_stuff):

 {{{
 (gdb) r -i gray.png out.pcx
 Starting program: F:\MinGW\msys\1.0\ffmpeg-HEAD-834f80d/ffmpeg_g.exe -i
 gray.png
  out.pcx
 [New Thread 3752.0x8e0]
 ffmpeg version 0.9.0.git-834f80d, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Dec 22 2011 14:07:40 with gcc 4.5.2
   configuration: --disable-ffplay --disable-ffserver --disable-asm
 --disable-yas
 m --disable-shared --enable-static
   libavutil      51. 32.100 / 51. 32.100
   libavcodec     53. 47.100 / 53. 47.100
   libavformat    53. 28.100 / 53. 28.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 53.  0 /  2. 53.  0
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  5.100 /  0.  0.100
 Input #0, image2, from 'gray.png':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: png, gray, 1024x768, 25 tbr, 25 tbn, 25 tbc
 [buffer @ 03d61590] w:1024 h:768 pixfmt:gray tb:1/1000000 sar:0/1
 sws_param:
 Output #0, image2, to 'out.pcx':
   Metadata:
     encoder         : Lavf53.28.100
     Stream #0:0: Video: pcx, gray, 1024x768, q=2-31, 200 kb/s, 90k tbn, 25
 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (png -> pcx)
 Press [q] to stop, [?] for help

 Program received signal SIGSEGV, Segmentation fault.
 pcx_encode_frame (avctx=0x42b0048, buf=0x4457453 "", buf_size=5515024,
     data=0x22daf0) at libavcodec/pcxenc.c:185
 185                 bytestream_put_be24(&buf, pal[i]);
 (gdb) bt
 #0  pcx_encode_frame (avctx=0x42b0048, buf=0x4457453 "", buf_size=5515024,
     data=0x22daf0) at libavcodec/pcxenc.c:185
 #1  0x00509101 in avcodec_encode_video (avctx=0x42b0048,
     buf=0x43b0020 "\n\005\001\b", buf_size=5515024, pict=0x22daf0)
     at libavcodec/utils.c:881
 #2  0x00404f6e in do_video_out (s=0x3d5f3b0, ost=0x3d5fd00,
     in_picture=0x3d61e00, frame_size=0x22de9c, quality=0,
     ist=<value optimized out>) at ffmpeg.c:1349
 #3  0x004068c5 in transcode_video (ist=0x3d611b0, ost_table=0x3d5fd00,
     nb_ostreams=1, pkt=0x22fbb8) at ffmpeg.c:1955
 #4  output_packet (ist=0x3d611b0, ost_table=0x3d5fd00, nb_ostreams=1,
     pkt=0x22fbb8) at ffmpeg.c:2046
 #5  0x0040a63e in transcode (output_files=<value optimized out>,
     nb_output_files=0, input_files=0x0, nb_input_files=4256952)
     at ffmpeg.c:2804
 #6  0x0022ff48 in ?? ()
 #7  0x00000000 in ?? ()
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/833#comment:2>
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