the questions have been commented and the log uploadedDoes the DVD folder on your hard drive play OK? --Same as Disc 50 minutes in source 25 min in dvd
Is this occurring with all files, some files, one file?
Are you using the same source files as previously? What is the source of your video files? Sony AX100 xvac-s 60p What capture device do you use? from sd card
Which encoder are you using? Single or double pass? single
Send us your log file also. Done