[FFmpeg-trac] #633(undetermined:open): lowres with some dvvideo files doesn't work correctly

[FFmpeg]

#633: lowres with some dvvideo files doesn't work correctly
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1


Comment:

 Crashes with ffplay (different backtraces possible)
 {{{
 gdb) r -lowres 1 -i dvcp.avi

 Starting program: ffplay_g -lowres 1 -i dvcp.avi
 [Thread debugging using libthread_db enabled]
 ffplay version N-34647-geb4fc6a, Copyright (c) 2003-2011 the FFmpeg
 developers
   built on Nov 10 2011 15:57:39 with gcc 4.5.3
   configuration: --cc='/usr/local/gcc-4.5.3/bin/gcc -m32'
   libavutil    51. 24. 1 / 51. 24. 1
   libavcodec   53. 31. 0 / 53. 31. 0
   libavformat  53. 20. 0 / 53. 20. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 47. 2 /  2. 47. 2
   libswscale    2.  1. 0 /  2.  1. 0
 [New Thread 0xf78e2b70 (LWP 17101)]
 [New Thread 0xf6f29b70 (LWP 17102)]
 [avi @ 0x8dfa320] parser not found for codec dvvideo, packets or times may
 be invalid.
 Input #0, avi, from 'dvcp.avi':
   Duration: 00:00:00.64, start: 0.000000, bitrate: 28907 kb/s
     Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR
 16:15 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 [New Thread 0xf6728b70 (LWP 17103)]
 [New Thread 0xf5f27b70 (LWP 17104)]

 Program received signal SIGSEGV, Segmentation fault.
 [Switching to Thread 0xf6728b70 (LWP 17103)]
 0x081b8767 in put_pixels_clamped4_c (line_size=192, pixels=0xf5624670 "",
 block=0xf6726a70)
     at libavcodec/dsputil.c:396
 396             pixels[0] = cm[block[0]];
 #0  0x081b8767 in put_pixels_clamped4_c (line_size=192, pixels=0xf5624670
 "", block=0xf6726a70)
     at libavcodec/dsputil.c:396
 #1  ff_jref_idct4_put (line_size=192, pixels=0xf5624670 "",
 block=0xf6726a70) at libavcodec/dsputil.c:2749
 #2  0x082080ec in dv_decode_video_segment (avctx=0x8dfa820, arg=0x8870a20)
 at libavcodec/dv.c:633
 #3  0x084bcbbe in avcodec_default_execute (c=0x8dfa820, func=0x8207630
 <dv_decode_video_segment>,
     arg=0x8870a20, ret=0x0, count=270, size=12) at libavcodec/utils.c:478
 #4  0x082046da in dvvideo_decode_frame (avctx=0x8dfa820, data=0xf5600480,
 data_size=0xf672814c,
     avpkt=0xf6728108) at libavcodec/dv.c:1099
 #5  0x084bdde1 in avcodec_decode_video2 (avctx=0x8dfa820,
 picture=0xf5600480, got_picture_ptr=0xf672814c,
     avpkt=0xf6728108) at libavcodec/utils.c:819
 #6  0x0804f30e in get_video_frame (pkt=0xf6728108, pts=<value optimized
 out>, frame=0xf5600480,
     is=0xf6f2a020) at ffplay.c:1483
 #7  input_request_frame (pkt=0xf6728108, pts=<value optimized out>,
 frame=0xf5600480, is=0xf6f2a020)
     at ffplay.c:1656
 #8  0x0805f7af in avfilter_request_frame (link=0xf5600840) at
 libavfilter/avfilter.c:520
 #9  0x08063d7b in av_buffersink_get_buffer_ref (ctx=0xf56005c0,
 bufref=0xf6728318, flags=0)
     at libavfilter/sink_buffer.c:128
 #10 0x0805037a in video_thread (arg=0xf6f2a020) at ffplay.c:1822
 #11 0xf7e50391 in ?? () from /usr/lib/libSDL-1.2.so.0
 #12 0xf7e9c6eb in ?? () from /usr/lib/libSDL-1.2.so.0
 #13 0xf7e2c6e5 in start_thread () from /lib/libpthread.so.0
 #14 0xf7e2c600 in ?? () from /lib/libpthread.so.0
 (gdb) disass $pc-13 $pc+32
 Dump of assembler code from 0x81b875a to 0x81b8787:
 0x081b875a <put_pixels_clamped4_c+0>:   movswl (%ebx),%eax
 0x081b875d <put_pixels_clamped4_c+3>:   lea    0x10(%ebx),%edx
 0x081b8760 <put_pixels_clamped4_c+6>:   movzbl 0x882e620(%eax),%eax
 0x081b8767 <put_pixels_clamped4_c+13>:  mov    %al,(%esi)
 0x081b8769 <put_pixels_clamped4_c+15>:  movswl 0x2(%ebx),%eax
 0x081b876d <put_pixels_clamped4_c+19>:  movzbl 0x882e620(%eax),%eax
 0x081b8774 <put_pixels_clamped4_c+26>:  mov    %al,0x1(%esi)
 0x081b8777 <put_pixels_clamped4_c+29>:  movswl 0x4(%ebx),%eax
 0x081b877b <put_pixels_clamped4_c+33>:  movzbl 0x882e620(%eax),%eax
 0x081b8782 <put_pixels_clamped4_c+40>:  mov    %al,0x2(%esi)
 0x081b8785 <put_pixels_clamped4_c+43>:  movswl 0x6(%ebx),%eax
 End of assembler dump.
 (gdb) info register
 eax            0x7d     125
 ecx            0x7e     126
 edx            0xf6726a80       -160273792
 ebx            0xf6726a70       -160273808
 esp            0xf67264d0       0xf67264d0
 ebp            0xc0     0xc0
 esi            0xf5624670       -178108816
 edi            0xc0     192
 eip            0x81b8767        0x81b8767 <put_pixels_clamped4_c+13>
 eflags         0x210282 [ SF IF RF ID ]
 cs             0x23     35
 ss             0x2b     43
 ds             0x2b     43
 es             0x2b     43
 fs             0x0      0
 gs             0x63     99
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/633#comment:1>
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