[FFmpeg-trac] #1802(undetermined:new): Segmentation fault with ffserver

FFmpeg trac at avcodec.org
Thu Oct 11 04:43:58 CEST 2012


#1802: Segmentation fault with ffserver
-------------------------------------+-------------------------------------
               Reporter:  burek      |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 I've tried:
 {{{
 # ffmpeg -f v4l2 -s 320x240 -r 30 -i /dev/video0 -f alsa -ac 2 -i hw:0
 http://localhost:8090/feed1.ffm
 }}}

 Using ffserver.conf:
 {{{
 Port 8090
 BindAddress 0.0.0.0
 MaxHTTPConnections 2000
 MaxClients 1000
 MaxBandwidth 1000
 CustomLog -
 #NoDaemon

 <Feed feed1.ffm>
         File /tmp/feed1.ffm
         FileMaxSize 200K
         ACL allow 127.0.0.1
 </Feed>

 <Stream live.flv>
         Format flv
         Feed feed1.ffm

         VideoCodec libx264
         VideoFrameRate 30
         VideoBitRate 512
         VideoSize 320x240
         AVOptionVideo crf 23
         AVOptionVideo preset medium
         AVPresetVideo default
         AVPresetVideo baseline
         AVOptionVideo flags +global_header

         AudioCodec aac
         Strict -2
         AudioBitRate 32
         AudioChannels 2
         AudioSampleRate 44100
         AVOptionAudio flags +global_header
 </Stream>

 ##################################################################
 # Special streams
 ##################################################################
 <Stream stat.html>
         Format status
         # Only allow local people to get the status
         ACL allow localhost
         ACL allow 192.168.0.0 192.168.255.255
 </Stream>

 # Redirect index.html to the appropriate site
 <Redirect index.html>
         URL http://www.ffmpeg.org/
 </Redirect>
 ##################################################################
 }}}

 Here is gdb output:
 {{{
 # gdb ffmpeg_g
 GNU gdb (GDB) 7.4.1-debian
 Copyright (C) 2012 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later
 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "x86_64-linux-gnu".
 For bug reporting instructions, please see:
 <http://www.gnu.org/software/gdb/bugs/>...
 Reading symbols from /root/tmp/ffmpeg/ffmpeg_g...done.
 (gdb) r -f v4l2 -s 320x240 -r 30 -i /dev/video0 -f alsa -ac 2 -i hw:0
 http://localhost:8090/feed1.ffm
 Starting program: /root/tmp/ffmpeg/ffmpeg_g -f v4l2 -s 320x240 -r 30 -i
 /dev/video0 -f alsa -ac 2 -i hw:0 http://localhost:8090/feed1.ffm
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 ffmpeg version N-37621-g9586db6 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Oct 10 2012 21:48:39 with gcc 4.6 (Debian 4.6.3-1)
   configuration: --enable-static --enable-shared --enable-gpl --enable-
 nonfree --enable-postproc --enable-libx264 --enable-libaacplus
   libavutil      51. 74.100 / 51. 74.100
   libavcodec     54. 65.100 / 54. 65.100
   libavformat    54. 31.100 / 54. 31.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 19.102 /  3. 19.102
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 [video4linux2,v4l2 @ 0x632420] Estimating duration from bitrate, this may
 be inaccurate
 Input #0, video4linux2,v4l2, from '/dev/video0':
   Duration: N/A, start: 152978.579464, bitrate: 36864 kb/s
     Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240,
 36864 kb/s, 30 tbr, 1000k tbn, 30 tbc
 [alsa @ 0x633440] Estimating duration from bitrate, this may be inaccurate
 Guessed Channel Layout for  Input Stream #1.0 : stereo
 Input #1, alsa, from 'hw:0':
   Duration: N/A, start: 1349923095.063673, bitrate: 1536 kb/s
     Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
 Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
   Metadata:
     creation_time   : now
     encoder         : Lavf54.31.100
     Stream #0:0: Audio: mp2, 44100 Hz, mono, s16, 32 kb/s
     Stream #0:1: Video: mpeg1video, yuv420p, 160x128, q=2-31, 64 kb/s,
 1000k tbn, 30 tbc
     Stream #0:2: Audio: wmav2, 22050 Hz, mono, fltp, 64 kb/s
     Stream #0:3: Video: msmpeg4v3, yuv420p, 352x240, q=2-31, 256 kb/s,
 1000k tbn, 30 tbc
 Stream mapping:
   Stream #1:0 -> #0:0 (pcm_s16le -> mp2)
   Stream #0:0 -> #0:1 (rawvideo -> mpeg1video)
   Stream #1:0 -> #0:2 (pcm_s16le -> wmav2)
   Stream #0:0 -> #0:3 (rawvideo -> msmpeg4)
 Press [q] to stop, [?] for help
 [New Thread 0x7ffff4036700 (LWP 10221)]
 [New Thread 0x7ffff3835700 (LWP 10222)]

 Program received signal SIGSEGV, Segmentation fault.
 0x00007ffff794a85d in avfilter_copy_buffer_ref_props () from
 /usr/local/lib/libavfilter.so.3
 (gdb) bt
 #0  0x00007ffff794a85d in avfilter_copy_buffer_ref_props () from
 /usr/local/lib/libavfilter.so.3
 #1  0x00007ffff793e9f6 in ?? () from /usr/local/lib/libavfilter.so.3
 #2  0x00007ffff794523b in ?? () from /usr/local/lib/libavfilter.so.3
 #3  0x00007ffff794523b in ?? () from /usr/local/lib/libavfilter.so.3
 #4  0x00007ffff794ae3d in ?? () from /usr/local/lib/libavfilter.so.3
 #5  0x00007ffff794b066 in av_buffersrc_add_ref () from
 /usr/local/lib/libavfilter.so.3
 #6  0x00007ffff794b1c8 in av_buffersrc_add_frame () from
 /usr/local/lib/libavfilter.so.3
 #7  0x00000000004188f6 in decode_audio (got_output=0x7fffffffde8c,
 pkt=0x7fffffffdce0, ist=0x634aa0) at ffmpeg.c:1539
 #8  output_packet (ist=<optimized out>, pkt=<optimized out>) at
 ffmpeg.c:1760
 #9  0x0000000000419369 in process_input (file_index=<optimized out>) at
 ffmpeg.c:2828
 #10 0x0000000000408034 in transcode_step () at ffmpeg.c:2924
 #11 transcode () at ffmpeg.c:2976
 #12 main (argc=<optimized out>, argv=<optimized out>) at ffmpeg.c:3160
 (gdb) disass $pc-32,$pc+32
 Dump of assembler code from 0x7ffff794a83d to 0x7ffff794a87d:
    0x00007ffff794a83d:  add    %al,(%rax)
    0x00007ffff794a83f:  add    %cl,-0x77(%rax)
    0x00007ffff794a842 <avfilter_copy_buffer_ref_props+2>:       pop
 %rsp
    0x00007ffff794a843 <avfilter_copy_buffer_ref_props+3>:       and
 $0xe8,%al
    0x00007ffff794a845 <avfilter_copy_buffer_ref_props+5>:       mov
 %rbp,-0x10(%rsp)
    0x00007ffff794a84a <avfilter_copy_buffer_ref_props+10>:      mov
 %rdi,%rbx
    0x00007ffff794a84d <avfilter_copy_buffer_ref_props+13>:      mov
 %r12,-0x8(%rsp)
    0x00007ffff794a852 <avfilter_copy_buffer_ref_props+18>:      sub
 $0x28,%rsp
    0x00007ffff794a856 <avfilter_copy_buffer_ref_props+22>:      mov
 0x80(%rsi),%rax
 => 0x00007ffff794a85d <avfilter_copy_buffer_ref_props+29>:      mov
 %rax,0x80(%rdi)
    0x00007ffff794a864 <avfilter_copy_buffer_ref_props+36>:      mov
 0x88(%rsi),%rax
    0x00007ffff794a86b <avfilter_copy_buffer_ref_props+43>:      mov
 %rax,0x88(%rdi)
    0x00007ffff794a872 <avfilter_copy_buffer_ref_props+50>:      mov
 0x98(%rsi),%eax
    0x00007ffff794a878 <avfilter_copy_buffer_ref_props+56>:      test
 %eax,%eax
    0x00007ffff794a87a <avfilter_copy_buffer_ref_props+58>:      jne
 0x7ffff794a910 <avfilter_copy_buffer_ref_props+208>
 End of assembler dump.
 (gdb)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1802>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list