[FFmpeg-trac] #59(avfilter:open): Kega Game Video codec regression (most likely because of libavfilter)

[FFmpeg]

#59: Kega Game Video codec regression (most likely because of libavfilter)
----------------------+-----------------------
Reporter:  ami_stuff  |       Owner:
    Type:  defect     |      Status:  open
Priority:  important  |   Component:  avfilter
 Version:  git        |  Resolution:
Keywords:             |  Blocked By:
Blocking:             |  Reproduced:  1
Analyzed:  0          |
----------------------+-----------------------
Changes (by cehoyos):

 * priority:  normal => important
 * status:  new => open
 * version:  unspecified => git
 * component:  undetermined => avfilter
 * reproduced:  0 => 1


Comment:

 Plays fine with ffplay and --disable-avfilter (fails with ffmpeg and
 --disable-avfilter), crashes with --enable-avfilter.
 {{{
 (gdb) r -i kgv1.avi -f null -

 FFmpeg version git-N-29061-g5c00687, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Apr 12 2011 18:07:12 with gcc 4.5.2
   configuration: --cc='/usr/local/gcc-4.5.2/bin/gcc -m32' --disable-asm
   libavutil    50. 40. 1 / 50. 40. 1
   libavcodec   52.119. 0 / 52.119. 0
   libavformat  52.106. 0 / 52.106. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 78. 0 /  1. 78. 0
   libswscale    0. 13. 0 /  0. 13. 0
 Input #0, avi, from 'kgv1.avi':
   Duration: 00:00:05.21, start: 0.000000, bitrate: 1633 kb/s
     Stream #0.0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
     Stream #0.1: Video: kgv1, rgb555le, 640x480, 60 tbr, 60 tbn, 60 tbc
 [buffer @ 0x8bd6bd0] w:640 h:480 pixfmt:rgb555le
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf52.106.0
     Stream #0.0: Video: rawvideo, rgb555le, 640x480, q=2-31, 200 kb/s, 90k
 tbn, 60 tbc
     Stream #0.1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
 Stream mapping:
   Stream #0.1 -> #0.0
   Stream #0.0 -> #0.1
 Press [q] to stop encoding

 Program received signal SIGSEGV, Segmentation fault.
 0x0806b9ad in av_vsrc_buffer_add_frame2 (buffer_filter=0x8bd6bd0,
 frame=0xffffbe60, pts=0, pixel_aspect=..., width=320, height=240,
 pix_fmt=PIX_FMT_RGB555LE, sws_param=0x852d14b "0:0") at
 libavfilter/vsrc_buffer.c:61
 61                     width,height,pix_fmt, c->pix_fmt,
 scale->outputs[0]->format);
 gdb) bt
 #0  0x0806b9ad in av_vsrc_buffer_add_frame2 (buffer_filter=0x8bd6bd0,
 frame=0xffffbe60, pts=0, pixel_aspect=..., width=320, height=240,
 pix_fmt=PIX_FMT_RGB555LE, sws_param=0x852d14b "0:0") at
 libavfilter/vsrc_buffer.c:61
 #1  0x0804f1ef in output_packet (ist=0x8bd6b00, ist_index=1,
 ost_table=0x8bd6b60, nb_ostreams=2, pkt=0xffffce10) at ffmpeg.c:1638
 #2  0x08053405 in transcode (nb_output_files=1, nb_input_files=1,
 stream_maps=0x0, nb_stream_maps=0, input_files=0x866e8c0,
 output_files=0x866e720) at ffmpeg.c:2709
 #3  0x08058059 in main (argc=6, argv=0xffffd004) at ffmpeg.c:4459
 (gdb) disass $pc-32 $pc+32
 Dump of assembler code from 0x806b98d to 0x806b9cd:
 0x0806b98d <av_vsrc_buffer_add_frame2+61>:      add    %eax,(%eax)
 0x0806b98f <av_vsrc_buffer_add_frame2+63>:      add    %cl,0x1008b(%ebx)
 0x0806b995 <av_vsrc_buffer_add_frame2+69>:      add
 %cl,-0x749fdbac(%ebx)
 0x0806b99b <av_vsrc_buffer_add_frame2+75>:      inc    %edx
 0x0806b99c <av_vsrc_buffer_add_frame2+76>:      and
 %cl,-0x7487dbac(%ebx)
 0x0806b9a2 <av_vsrc_buffer_add_frame2+82>:      add
 %cl,0x44890840(%ebx)
 0x0806b9a8 <av_vsrc_buffer_add_frame2+88>:      and    $0x3c,%al
 0x0806b9aa <av_vsrc_buffer_add_frame2+90>:      mov    0x20(%eax),%eax
 0x0806b9ad <av_vsrc_buffer_add_frame2+93>:      mov    (%eax),%eax
 0x0806b9af <av_vsrc_buffer_add_frame2+95>:      mov    0x38(%eax),%eax
 0x0806b9b2 <av_vsrc_buffer_add_frame2+98>:      mov    %ecx,0x18(%esp)
 0x0806b9b6 <av_vsrc_buffer_add_frame2+102>:     mov    0x80(%esp),%ecx
 0x0806b9bd <av_vsrc_buffer_add_frame2+109>:     mov    %edx,0xc(%esp)
 0x0806b9c1 <av_vsrc_buffer_add_frame2+113>:     movl
 $0x8531cec,0x8(%esp)
 0x0806b9c9 <av_vsrc_buffer_add_frame2+121>:     mov    %eax,0x1c(%esp)
 End of assembler dump.
 (gdb) info register
 eax            0x0      0
 ecx            0x2e     46
 edx            0x140    320
 ebx            0x8bd6c60        146631776
 esp            0xffffbbe0       0xffffbbe0
 ebp            0xffffbe60       0xffffbe60
 esi            0xffffbe60       -16800
 edi            0x0      0
 eip            0x806b9ad        0x806b9ad <av_vsrc_buffer_add_frame2+93>
 eflags         0x10202  [ IF RF ]
 cs             0x23     35
 ss             0x2b     43
 ds             0x2b     43
 es             0x2b     43
 fs             0x0      0
 gs             0x63     99
 }}}

-- 
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/59#comment:1>
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