Code:
/usr/bin/ffmpeg -i '/home/cmehire/public_html/video/14012010037_1.mp4' -acodec libfaac -ab 96k -vcodec libx264 -vpre hq -crf 22 -threads 0 -b 561.423k /home/cmehire/public_html/flvideo/4ca4238a0b/12677656502040159875.mp4
Look like this convert code is not working on your server. Try running the convert command in command promt and see if it works. If not you need to look into ffmpeg installation. Mostly it is not installed with libx264 needed for mp4 videos.