[FFmpeg-trac] #9309(ffmpeg:new): Static build segmentation fault on CentOS 8.4 when using rtmp
FFmpeg
trac at avcodec.org
Wed Jun 30 03:39:47 EEST 2021
#9309: Static build segmentation fault on CentOS 8.4 when using rtmp
-------------------------------------+-------------------------------------
Reporter: Matt | Type: defect
Status: new | Priority: critical
Component: ffmpeg | Version:
Keywords: RTMP | unspecified
librtmp rtmp rtmpe rtmps | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
Segmentation fault is generated immediately when trying to use rtmp
features with ffmpeg static build. I've replicated the problem on ffmpeg
4.3, 4.4 and the master static builds.
How to reproduce:
This is really simple to reproduce. Using a new CentOS 8 (8.4) VM from
Vultr.
How to reproduce:
{{{
wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-
amd64-static.tar.xz;
tar xf ffmpeg-release-amd64-static.tar.xz;
ffmpeg-4.4-amd64-static/ffmpeg -f flv -listen 1 -i
rtmp://localhost:1935/live/app
}}}
Produces the following output:
{{{
ffmpeg version 4.4-static https://johnvansickle.com/ffmpeg/ Copyright (c)
2000-2021 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
--cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp
--enable-libgme --enable-gray --enable-libaom --enable-libfribidi
--enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt
--enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid
--enable-libzvbi --enable-libzimg
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Segmentation fault (core dumped)
}}}
Valgrind output:
{{{
[root at vultrguest ~]# valgrind ffmpeg-4.4-amd64-static/ffmpeg -f flv
-listen 1 -i rtmp://localhost:1935/live/app
==21193== Memcheck, a memory error detector
==21193== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==21193== Using Valgrind-3.16.0 and LibVEX; rerun with -h for copyright
info
==21193== Command: ffmpeg-4.4-amd64-static/ffmpeg -f flv -listen 1 -i
rtmp://localhost:1935/live/app
==21193==
==21193== Syscall param set_robust_list(head) points to uninitialised
byte(s)
==21193== at 0x133E42D: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94583: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193== Address 0x5784c70 is in the brk data segment
0x5784000-0x57852bf
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1BCE4E4: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C4321A: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C46C3E: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C491C0: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1BCE589: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C4321A: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C46C3E: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C491C0: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1BCC89C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BCD734: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BCE593: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C4321A: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C46C3E: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C491C0: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B2600C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B275F9: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B2600C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27054: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B276AF: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B27097: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B276AF: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B2600C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B26945: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27719: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B26977: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27719: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B2600C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B26DA7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27722: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B26BB8: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27722: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B2600C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B26D8F: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27722: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1B26D3C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B27722: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C26EC: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x19C2BCE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94CC3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B945F2: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
ffmpeg version 4.4-static https://johnvansickle.com/ffmpeg/ Copyright (c)
2000-2021 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1BFB0C9: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BB615D: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BC384F: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BBC3FE: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x12244F3: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1224971: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4C4B33: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AB7A7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94650: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1C05CE7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x12245F0: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1224971: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4C4B33: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AB7A7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94650: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1BFB0C9: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1BBE094: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1224735: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1224971: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4C4B33: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AB7A7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1B94650: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x4AF509: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1FFF000437: ???
==21193==
configuration: --enable-gpl --enable-version3 --enable-static --disable-
debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
--cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp
--enable-libgme --enable-gray --enable-libaom --enable-libfribidi
--enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt
--enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid
--enable-libzvbi --enable-libzimg
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
==21193== Conditional jump or move depends on uninitialised value(s)
==21193== at 0x1C34D1C: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C2797E: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C28E76: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x84A2AD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x7320BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x81F6F7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x731F50: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x735B4F: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x80D349: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x85D262: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193==
==21193== Invalid read of size 1
==21193== at 0x5F92BD0: __nss_readline (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x5F8D833: internal_getent (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x5F8EC71: _nss_files_gethostbyname4_r (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x1C27E49: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C28E76: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x84A2AD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x7320BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x81F6F7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x731F50: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x735B4F: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== Address 0x63 is not stack'd, malloc'd or (recently) free'd
==21193==
==21193==
==21193== Process terminating with default action of signal 11 (SIGSEGV):
dumping core
==21193== Access not within mapped region at address 0x63
==21193== at 0x5F92BD0: __nss_readline (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x5F8D833: internal_getent (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x5F8EC71: _nss_files_gethostbyname4_r (in
/usr/lib64/libnss_files-2.28.so)
==21193== by 0x1C27E49: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x1C28E76: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x84A2AD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x7320BD: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x81F6F7: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x731F50: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x732362: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== by 0x735B4F: ??? (in /root/ffmpeg-4.4-amd64-static/ffmpeg)
==21193== If you believe this happened as a result of a stack
==21193== overflow in your program's main thread (unlikely but
==21193== possible), you can try to increase the size of the
==21193== main thread stack using the --main-stacksize= flag.
==21193== The main thread stack size used in this run was 8388608.
==21193==
==21193== HEAP SUMMARY:
==21193== in use at exit: 0 bytes in 0 blocks
==21193== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==21193==
==21193== All heap blocks were freed -- no leaks are possible
==21193==
==21193== Use --track-origins=yes to see where uninitialised values come
from
==21193== For lists of detected and suppressed errors, rerun with: -s
==21193== ERROR SUMMARY: 18 errors from 18 contexts (suppressed: 0 from 0)
Segmentation fault (core dumped)
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9309>
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