Converting Video File at 100%

I’ve been converting a Channels file (Grease), and it seems stuck at 100% (past 30 minutes). It also causes C drive to go from 60% to 95% full (adds 40gb). If I stop and start over, C goes back to about 55gb. Do I just keep waiting? Other files go much faster. Creating mp4 unchanged other than commercials.

Edit: Finally waited long enough and now its moving converted file (that took 15 minutes). Original file 3gb, converted file 34gb. Playon recordings stay about same size. Channels doing something strange?

Also, video won’t play. 2gb log file!

I changed mp4 unprocessed to mp4 normal, and file processed normally. 3gb now 2.1gb. Odd.