well I tried to just export from the timeline to H264 from prores422HQ. But the file ended up being appended. So I exported with current settings and tried converting the exported file from with in final cut pro ..seemed to be as easy as using compressor stepwise. But yeah. I could have done it with compressor. I’ll have to try that to see if the error keeps happening. My question was really asking why would the file be abbreviated on export from FCP. It was a 2:30 length file that for some reason on export was abbreviated to 2:10 . I repeated it several times to test. rebooted, etc…