[FFmpeg-trac] #1400(undetermined:new): Segfault, using -filter_complex

[FFmpeg]

#1400: Segfault, using -filter_complex
-------------------------------------+-------------------------------------
             Reporter:  burek        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When running the following command line, a segmentation fault message
 appeared:

 {{{
 $ ffmpeg -i 1.flv -i 2.flv -filter_complex
 '[0:0]scale=iw/2:ih/2,pad=2*iw:ih[left];[1:0]scale=iw/2:ih/2[right];[left][right]overlay=main_w/2:0;[0:1][1:1]
 amerge' out.flv
 ffmpeg version N-41142-g8f61526 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May 30 2012 13:40:37 with gcc 4.6.3
   configuration: --enable-static --enable-shared --enable-gpl --enable-
 nonfree --enable-postproc --enable-libx264 --enable-libaacplus --enable-
 libmp3lame --enable-libopenjpeg --enable-zlib
   libavutil      51. 55.100 / 51. 55.100
   libavcodec     54. 23.100 / 54. 23.100
   libavformat    54.  6.101 / 54.  6.101
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     2. 77.100 /  2. 77.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [h264 @ 0x9797680] reference picture missing during reorder
     Last message repeated 3 times
 [h264 @ 0x9797680] Missing reference picture
 [h264 @ 0x9797680] decode_slice_header error
 [h264 @ 0x9797680] concealing 576 DC, 576 AC, 576 MV errors
 [h264 @ 0x9797680] reference picture missing during reorder
     Last message repeated 1 times
 [h264 @ 0x9797680] Missing reference picture
     Last message repeated 1 times
 [h264 @ 0x9797680] reference picture missing during reorder
 [h264 @ 0x9797680] Missing reference picture
 Input #0, flv, from '1.flv':
   Metadata:
     encoder         : Lavf54.0.100
   Duration: 00:15:04.99, start: 0.000000, bitrate: 157 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 512x288 [SAR 3:4 DAR 4:3],
 250 tbr, 1k tbn, 50 tbc
     Stream #0:1: Audio: aac, 44100 Hz, stereo, s16
 [h264 @ 0x9798da0] reference picture missing during reorder
     Last message repeated 3 times
 [h264 @ 0x9798da0] Missing reference picture
 [h264 @ 0x9798da0] decode_slice_header error
 [h264 @ 0x9798da0] concealing 576 DC, 576 AC, 576 MV errors
 [h264 @ 0x9798da0] reference picture missing during reorder
     Last message repeated 1 times
 [h264 @ 0x9798da0] Missing reference picture
     Last message repeated 1 times
 [h264 @ 0x9798da0] reference picture missing during reorder
 [h264 @ 0x9798da0] Missing reference picture
 Input #1, flv, from '2.flv':
   Metadata:
     encoder         : Lavf53.31.100
   Duration: 00:15:00.49, start: 0.000000, bitrate: 431 kb/s
     Stream #1:0: Video: h264 (High), yuv420p, 512x288 [SAR 3:4 DAR 4:3],
 50 tbr, 1k tbn, 50 tbc
     Stream #1:1: Audio: aac, 44100 Hz, stereo, s16
 [buffer @ 0x9ae4b40] w:512 h:288 pixfmt:yuv420p tb:1/1000 sar:3/4
 sws_param:flags=2
 [buffer @ 0x98ab100] w:512 h:288 pixfmt:yuv420p tb:1/1000 sar:3/4
 sws_param:flags=2
 [buffersink @ 0x9ae4a40] No opaque field provided
 No channel layout for input 1
 Segmentation fault
 }}}

 (warnings about "reference picture" are due to live capturing of h264
 stream, so some starting key frames are missing I guess, but both videos
 play normally)

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1400>
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