Your graphics driver is culprit, it’s unstable, maybe some program running in the background causing it to hang or take up lots of resources or the computer just needed a reboot:
Error code -17, hb_qsv_wait_on_sync 602
ERROR> 2017-11-28T02:29:17 MCEBuddy.AppWrapper.Handbrake → Hardware encoding appears to have hung, no progress in the last 300 seconds.
When in doubt look for the ERROR> lines in the log to tell you what’s the likely issue.