[FFmpeg-trac] #2444(undetermined:new): memory corruption/core dump using alpha overlay in current git ffmpeg

[FFmpeg]

#2444: memory corruption/core dump using alpha overlay in current git ffmpeg
-------------------------------------+-------------------------------------
             Reporter:  MarkZV       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Although the same command was working with an earlier ffmpeg
 (864fdfa0627e21ee0b69e957c3413114185623a7), after updating ffmpeg to the
 latest git head (1fabd950355849fe8df77226e5f048cd6bdcfb6a) memory
 corruption and a core dump are encountered using some combinations of
 video filters.

 This is on Mac OS X 10.6.8:
 {{{
 $ ffmpeg -i lik.mp4 -r 15 -loop 1 -i lik.jpeg -filter_complex '[1]
 format=rgba,fade=out:15:15:alpha=1 [C]; [0] setsar=1,yadif,mp=eq2=1.1 [P];
 [P][C] overlay [V]' -map '[V]' -y out.mp4
 ffmpeg version 1.1.git-1fabd95 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Apr  6 2013 18:53:57 with gcc 4.2.1 (GCC) (Apple Inc. build
 5666) (dot 3)
   configuration: --prefix=/opt/local --enable-swscale --enable-avfilter
 --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora
 --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug
 --enable-libass --enable-libvpx --enable-libspeex --enable-libfreetype
 --mandir=/opt/local/share/man --enable-shared --enable-pthreads
 --cc=/usr/bin/gcc-4.2 --arch=x86_64 --enable-yasm --enable-gpl --enable-
 postproc --enable-libx264 --enable-libxvid --enable-version3 --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-nonfree --enable-
 libfdk-aac --enable-libfaac
   libavutil      52. 25.100 / 52. 25.100
   libavcodec     55.  2.100 / 55.  2.100
   libavformat    55.  1.100 / 55.  1.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 49.100 /  3. 49.100
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'lik.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf55.1.100
   Duration: 00:00:06.07, start: 0.000000, bitrate: 59 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 180x180 [SAR 1:1 DAR 1:1], 57 kb/s, 15 fps, 15 tbr, 50k tbn, 30 tbc
     Metadata:
       handler_name    : VideoHandler
 [image2 @ 0x102847600] max_analyze_duration 5000000 reached at 5000000
 microseconds
 Input #1, image2, from 'lik.jpeg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #1:0: Video: mjpeg, yuvj420p, 180x180 [SAR 1:1 DAR 1:1], 25
 fps, 25 tbr, 25 tbn, 25 tbc
 [Parsed_mp_4 @ 0x102023c60] 'eq2' is a wrapped MPlayer filter
 (libmpcodecs). This filter may be removed
 once it has been ported to a native libavfilter.
 [libx264 @ 0x1028bbc00] using SAR=1/1
 [libx264 @ 0x1028bbc00] using cpu capabilities: MMX2 SSE2Fast SSSE3
 Cache64
 [libx264 @ 0x1028bbc00] profile High, level 1.1
 [libx264 @ 0x1028bbc00] 264 - core 129 - H.264/MPEG-4 AVC codec - Copyleft
 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0
 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6
 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=15
 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
 Output #0, mp4, to 'out.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf55.1.100
     Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 180x180
 [SAR 1:1 DAR 1:1], q=-1--1, 50k tbn, 15 tbc
 Stream mapping:
   Stream #0:0 (h264) -> setsar
   Stream #1:0 (mjpeg) -> format
   overlay -> Stream #0:0 (libx264)
 Press [q] to stop, [?] for help
 ffmpeg(43912,0x7fff705a3cc0) malloc: *** error for object 0x105810e08:
 incorrect checksum for freed object - object was probably modified after
 being freed.
 *** set a breakpoint in malloc_error_break to debug
 Abort trap (core dumped)
 $
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2444>
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