https://tsecurity.de/de/1541440/IT+Reverse+Engineering/Sicherheitsl%C3%BCcken/CVE-2015-6821+%7C+FFmpeg+up+to+2.7.1+libavcodec%2Fmpegvideo.c+ff_mpv_common_init+input+validation+%28DLA+1611-1+%2F+BID-77073%29/