It came back again, but I have moved my web over to fastcomet.com, host for web is now a joke. Don't rent at server at HFW because limited 1GB ram, I get too many failed processing from the video who uploaded.
Fast comet provides free SSL, free RMS, 2GB ram, on the sharing server at the business plan.
now I can upload 200mb video without a problem at ffmpeg, it did convert very fast. 10 times way better than HFW. I don't see any more cron jobs errors.
It wasn't the memory,
I moved to PHP to 5.4, from 5.6.
reset default values, added eaccelerator instead APC.
In the php configure and it was 512mb memory to run,
No more cron jobs error, thanks for giving me a clue and it was problem solved.