SEGV on unknown address 0x0000000002a4 at x265::MotionEstimate::motionEstimate

Issue #558 new
Kittywhiskers Van Gogh created an issue

Original issue from GitHub

  • Operating System: macOS Catalina 10.15.5
  • ffmpeg configuration:
ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.62)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3-with-options_2 --enable-shared --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libaom --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --disable-libjack --disable-indev=jack --enable-opencl --enable-videotoolbox --disable-htmlpages --enable-chromaprint --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfdk-aac --enable-libgme --enable-libgsm --enable-libmodplug --enable-libopenh264 --enable-libopenjpeg --enable-librav1e --enable-librsvg --enable-librtmp --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtesseract --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libwavpack --enable-libwebp --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-openssl --enable-nonfree --enable-decklink --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100

Reproduced with newly available footage (to eliminate the possibility of corrupt footage, checked with ffprobe before starting instance), it was suggested that the problem wasn’t with ffmpeg but with x265

ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.62)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3-with-options_2 --enable-shared --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libaom --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --disable-libjack --disable-indev=jack --enable-opencl --enable-videotoolbox --disable-htmlpages --enable-chromaprint --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfdk-aac --enable-libgme --enable-libgsm --enable-libmodplug --enable-libopenh264 --enable-libopenjpeg --enable-librav1e --enable-librsvg --enable-librtmp --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtesseract --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libwavpack --enable-libwebp --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-openssl --enable-nonfree --enable-decklink --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'c306c7a7-1969-492f-9ff1-c6d92cd44742/31.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.45.100
  Duration: 00:03:04.62, start: 0.000000, bitrate: 249 kb/s
    Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 114 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc.
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> hevc (libx265))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 3.4
x265 [info]: build info [Mac OS X][clang 11.0.3][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 16 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 4 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge         : star / 57 / 3 / 3
x265 [info]: Keyframe min / max / scenecut / bias  : 24 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt        : 25 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress            : CRF-50.0 / 0.60
x265 [info]: tools: rect limit-modes rd=4 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
x265 [info]: tools: rskip mode=1 signhide tmvp strong-intra-smoothing lslices=4
x265 [info]: tools: deblock sao
Output #0, mp4, to 'c306c7a7-1969-492f-9ff1-c6d92cd44742/32.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.45.100
    Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc.
      encoder         : Lavc58.91.100 libx265
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.91.100 aac
UndefinedBehaviorSanitizer:DEADLYSIGNAL8kB time=00:00:38.03 bitrate= 165.4kbits/s speed=0.595x
==56318==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x0000000002a4 (pc 0x00010acb8257 bp 0x7000035236a0 sp 0x7000035223e0 T6543552)
==56318==The signal is caused by a READ memory access.
==56318==Hint: address points to the zero page.
    #0 0x10acb8256 in x265::MotionEstimate::motionEstimate(x265::ReferencePlanes*, x265::MV const&, x265::MV const&, x265::MV const&, int, x265::MV const*, int, x265::MV&, unsigned int, unsigned char*) (libx265.192.dylib:x86_64+0x24256)
    #1 0x10acac0db in x265::Search::predInterSearch(x265::Mode&, x265::CUGeom const&, bool, unsigned int*) (libx265.192.dylib:x86_64+0x180db)
    #2 0x10aca04b5 in x265::Analysis::checkInter_rd0_4(x265::Mode&, x265::CUGeom const&, x265::PartSize, unsigned int*) (libx265.192.dylib:x86_64+0xc4b5)
    #3 0x10ac989b2 in x265::Analysis::compressInterCU_rd0_4(x265::CUData const&, x265::CUGeom const&, int) (libx265.192.dylib:x86_64+0x49b2)
    #4 0x10ac981dc in x265::Analysis::compressInterCU_rd0_4(x265::CUData const&, x265::CUGeom const&, int) (libx265.192.dylib:x86_64+0x41dc)
    #5 0x10ac981dc in x265::Analysis::compressInterCU_rd0_4(x265::CUData const&, x265::CUGeom const&, int) (libx265.192.dylib:x86_64+0x41dc)
    #6 0x10ac963e0 in x265::Analysis::compressCTU(x265::CUData&, x265::Frame&, x265::CUGeom const&, x265::Entropy const&) (libx265.192.dylib:x86_64+0x23e0)
    #7 0x10acc9345 in x265::FrameEncoder::processRowEncoder(int, x265::ThreadLocalData&) (libx265.192.dylib:x86_64+0x35345)
    #8 0x10acc88d1 in x265::FrameEncoder::processRow(int, int) (libx265.192.dylib:x86_64+0x348d1)
    #9 0x10b09ab67 in x265::WaveFront::findJob(int) (libx265.192.dylib:x86_64+0x406b67)
    #10 0x10b099d9f in x265::WorkerThread::threadMain() (libx265.192.dylib:x86_64+0x405d9f)
    #11 0x10b099c7e in x265::ThreadShim(void*) (libx265.192.dylib:x86_64+0x405c7e)
    #12 0x7fff6be70108 in _pthread_start (libsystem_pthread.dylib:x86_64+0x6108)
    #13 0x7fff6be6bb8a in thread_start (libsystem_pthread.dylib:x86_64+0x1b8a)

==56318==Register values:
rax = 0x000000000000002d  rbx = 0xfffffffffffffed4  rcx = 0x000001930000002c  rdx = 0x00007000035213a0
rdi = 0x00007fd6fdc61a80  rsi = 0x0000000000000020  rbp = 0x00007000035236a0  rsp = 0x00007000035223e0
 r8 = 0x0000000000000060   r9 = 0x0000000000000018  r10 = 0x00000000000002a0  r11 = 0x00007000035213c8
r12 = 0x000000000000002e  r13 = 0x000000010bb38f00  r14 = 0x0000000000000004  r15 = 0x0000000000000003
UndefinedBehaviorSanitizer can not provide additional info.
==56318==ABORTING
./ffmpegDecompose.sh: line 41: 56318 Abort trap: 6           "/usr/local/bin/ffmpeg" -y -i "$1" -c:v libx265 -preset slow -c:a aac -x265-params crf="$DECOMPOSITION_CRF_VALUE" "$2"
  • The computer has 32GB of RAM with little memory pressure, this happened unexpectedly so I don't have a memdump

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