[MEncoder-users] problem:concatenate mp4 into new one

[Pengpeng]

pt at pt-laptop:~$ MP4Box  -info /home/pt/sbd1.mp4
Error opening file /home/pt/sbd1.mp4: IsoMedia File is truncated
pt at pt-laptop:~$ MP4Box  -info /home/pt/sbd0.mp4
Error opening file /home/pt/sbd0.mp4: IsoMedia File is truncated
pt at pt-laptop:~$ mp4box  -info /home/pt/sbd0.mp4
mp4box: command not found
pt at pt-laptop:~$ mediainfo /home/pt/sbd0.mp4
mediainfo: command not found
pt at pt-laptop:~$ MP4Box -cat /home/pt/sbd0.mp4 -cat /home/pt/sbd1.mp4 -new /home/pt/sbd01.mp4 
No suitable media tracks to cat in /home/pt/sbd0.mp4 - skipping
Segmentation fault

1.in my computer ,can't write  "mp4box  -info /home/pt/sbd0.mp4"
the command is "MP4Box  -info /home/pt/sbd1.mp4"
2.how to concatenate them into new one?