Trying to convert a bunch of mts-files into a big mp4-file:
stephan@rechenmonster:/mnt/backupsystem/archive2/Videos/20151222/PRIVATE/AVCHD/BDMV$ ~/bin/ffmpeg
@sers answer is totally right i just show you command so you don't put -safe 0 at anywhere else.
ffmpeg.exe -f concat -safe 0 -i "clips.txt" -c copy "video.mp4"