This indicates an attack attempt against an Integer Overflow vulnerability in FFmpeg.
The vulnerability is caused by an error when the vulnerable software handles a specially crafted media file. A remote unauthenticated attacker may be able to exploit this to execute arbitrary code, via a crafted media file.
FFmpeg Project Team FFmpeg prior to 3.0.4
FFmpeg Project Team FFmpeg prior to 3.1.4
FFmpeg Project Team FFmpeg prior to 3.2
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the latest update from the vendor.