ffmpeg issues on Linux

[Rikkflixx 0]

I've been running 4.9.1.80 on RHEL 10 for a while now.  Everything seems to be just fine.  But I did notice errors starting to appear in dmesg like these:

[ 2293.684582] ffmpeg[16023]: segfault at 18 ip 00007f7e88fdf35e sp 00007ffe5bdd6fc0 error 4 in libavcodec.so.59.37.100[5df35e,7f7e88a00000+18fc000] likely on CPU 4 (core 0, socket 0)
[ 2293.684593] Code: 8b 0f 1f 00 41 c7 87 3c 07 00 00 01 00 00 00 49 8b 87 08 02 00 00 49 39 87 f0 01 00 00 0f 8d a3 fc ff ff 49 8b 87 e0 01 00 00 <48> 8b 40 18 49 2b 87 18 02 00 00 48 83 bb d8 01 00 00 00 49 89 87
[ 2296.813831] ffmpeg[16101]: segfault at 18 ip 00007f6c1dbdf35e sp 00007ffe521dc180 error 4 in libavcodec.so.59.37.100[5df35e,7f6c1d600000+18fc000] likely on CPU 4 (core 0, socket 0)
[ 2296.813841] Code: 8b 0f 1f 00 41 c7 87 3c 07 00 00 01 00 00 00 49 8b 87 08 02 00 00 49 39 87 f0 01 00 00 0f 8d a3 fc ff ff 49 8b 87 e0 01 00 00 <48> 8b 40 18 49 2b 87 18 02 00 00 48 83 bb d8 01 00 00 00 49 89 87
[ 2299.255499] ffmpeg[16141]: segfault at 18 ip 00007fb6d33df35e sp 00007ffc0a8e87e0 error 4 in libavcodec.so.59.37.100[5df35e,7fb6d2e00000+18fc000] likely on CPU 3 (core 3, socket 0)
 

In /var/lib/emby/logs I see lots of logs like these:
-rw-r--r--. 1 emby emby    17723 Oct 31 12:24 ffmpeg-transcode-f775ccdd-0b71-4a26-b7be-fe104315af85_1.txt
-rw-r--r--. 1 emby emby    17731 Oct 31 12:24 ffmpeg-transcode-f8c23b31-2256-4323-981f-39082c8000a8_1.txt
-rw-r--r--. 1 emby emby    17731 Oct 31 12:33 ffmpeg-transcode-f9041e3b-21a7-4a92-92f4-56bf429b4fc6_1.txt
-rw-r--r--. 1 emby emby    17723 Oct 31 12:32 ffmpeg-transcode-f9ff16e3-f738-42bd-9f41-2dc16eafe3d2_1.txt
 

Containing

 

12:32:16.495 ffmpeg version 5.1-emby_2023_06_25_p4 Copyright (c) 2000-2022 the FFmpeg developers and softworkz for Emby LLC
12:32:16.495   built with gcc 10.3.0 (crosstool-NG 1.25.0)
12:32:16.495 Execution Date: 2025-10-31 12:32:16
12:32:16.496 Censored.mkv: Input/output error
12:32:16.496 EXIT
 

The system versions seem to be fine:

root@stargate:/var/lib/emby/logs# ffmpeg -version | head -1
ffmpeg version 7.1.2 Copyright (c) 2000-2025 the FFmpeg developers
root@stargate:/var/lib/emby/logs# ffprobe -version | head -1
ffprobe version 7.1.2 Copyright (c) 2007-2025 the FFmpeg developers
 

root@stargate:~# sudo -u emby /opt/emby-server/bin/ffmpeg -version
/opt/emby-server/bin/ffmpeg: error while loading shared libraries: libavdevice.so.59: cannot open shared object file: No such file or directory
root@stargate:~# sudo -u emby env LD_LIBRARY_PATH=/opt/emby-server/lib /opt/emby-server/bin/ffmpeg -version
/opt/emby-server/bin/ffmpeg: error while loading shared libraries: libmfx.so.1: cannot open shared object file: No such file or directory
root@stargate:~# systemctl cat emby-server | grep LD_LIBRARY
root@stargate:~# 
 

root@stargate:~# sudo -u emby env LD_LIBRARY_PATH=/opt/emby-server/lib:/opt/emby-server/extra/lib /opt/emby-server/bin/ffmpeg -version
ffmpeg version 5.1-emby_2023_06_25_p4 Copyright (c) 2000-2022 the FFmpeg developers and softworkz for Emby LLC
built with gcc 10.3.0 (crosstool-NG 1.25.0)
configuration: --cc=x86_64-emby-linux-gnu-gcc --prefix=/home/embybuilder/Buildbot/x64/ffmpeg-x64/staging --disable-alsa --disable-doc --disable-ffplay --disable-gnutls --disable-libpulse --disable-librtmp --disable-libxcb --disable-openssl --disable-vdpau --disable-vulkan --disable-xlib --enable-chromaprint --enable-fontconfig --enable-gpl --enable-iconv --enable-libaribb24 --enable-libass --enable-libdav1d --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libzvbi --enable-mbedtls --enable-pic --enable-version3 --enable-libtesseract --enable-cuda-llvm --enable-cuvid --enable-libdrm --enable-libmfx --enable-nvdec --enable-nvenc --enable-vaapi --enable-opencl --enable-cross-compile --cross-prefix=x86_64-emby-linux-gnu- --arch=x86_64 --target-os=linux --enable-shared --disable-static --pkg-config=pkg-config --pkg-config-flags=--static --extra-libs='-ldl -lm -lstdc++ -lsharpyuv -pthread' --disable-debug
libavutil      57. 28.100 / 57. 28.100
libavcodec     59. 37.100 / 59. 37.100
libavformat    59. 27.100 / 59. 27.100
libavdevice    59.  7.100 / 59.  7.100
libavfilter     8. 44.100 /  8. 44.100
libswscale      6.  7.100 /  6.  7.100
libswresample   4.  7.100 /  4.  7.100
libpostproc    56.  6.100 / 56.  6.100
EXIT

Is it safe to switch to the newer versions of ffmpeg included on the system?   Should LD_LIBRARY_PATH be set in the systemd .service file?  Or is this library issue a red herring as the crash seems to happen inside libavcodec (seen in dmesg)?

 

Regards,

Rikki

[Luke 42077]

Hi there, please attach the complete emby server and ffmpeg log files. Thanks.