Php error in log files centos 7.3


I have logs full of these errors it fills up my space.
/bin/sh: line 1: 32526 Segmentation fault (core dumped) php -q /var/www/html/clipbucket/actions/video_convert.php > /dev/null 2>&1

What can be wrong?
php is 5.6 clipbucket is 2.8


Are you running out or RAM?


32 GB of ram is installed + 64Gb swap file


possible bad ram module?
perhaps try to (if can tie server up for long time) run memtest