I've tried to install FFmpeg from the default repository on 18.04.
ffmpeg: relocation error: /usr/lib/x86_64-linux-gnu/libswresample.so.2:
symbol av_calloc version LIBAVUTIL_55 not defined in file
libavutil.so.55 with link time reference
I believe I may have broken the shared libraries in the past when I tried to compile ffmpeg from source and then gave up.
Seeing this file in question /usr/lib/x86_64-linux-gnu/libswresample.so.2 was provided by the package libswresample2
$ dpkg-query -L libswresample2
/.
/usr
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/libswresample.so.2.9.100
/usr/share
/usr/share/doc
/usr/share/doc/libswresample2
/usr/share/doc/libswresample2/copyright
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/libswresample2
/usr/lib/x86_64-linux-gnu/libswresample.so.2
/usr/share/doc/libswresample2/changelog.Debian.gz
I tried to reinstall ffmpeg, libswresample-dev, libswresample2, libavutil55, and libavutil-dev and I'm still receiving the same error. I'm trying to avoid compiling ffmpeg from source again if possible.