In FFmpeg 4.1.3, there is a division by zero at adx_write_trailer in libavformat/rawenc.c.
https://www.debian.org/security/2020/dsa-4722
https://usn.ubuntu.com/4431-1/
https://trac.ffmpeg.org/ticket/7979
https://security.gentoo.org/glsa/202003-65
https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html