Video converted by Arista not playable in N900

[Hồng Quân]

Hi,
I have a Nokia N900 phone and used to use Arista (with built-in preset) to convert video to watch on my phone.
Start from Ubuntu 12.04, video outputted from Arista cannot be played on my phone any more. I'm not sure if the problem comes from Arista or the codec, but hope you can help.

My PC:
hongquan@Pangolin ~ $ lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
hongquan@Pangolin ~ $ apt-cache policy arista
arista:
  Installed: 0.9.7-3ubuntu1
  Candidate: 0.9.7-3ubuntu1
  Version table:
 *** 0.9.7-3ubuntu1 0
        500 http://ubuntu.ctu.edu.vn/archive/ precise/universe i386 Packages
        100 /var/lib/dpkg/status

Old video (viewable on N900): https://dc2.safesync.com/DVhWzCv/Video/OK_with_N900.m4v?a=lx1ahPK-ts4
New video (not viewable): https://dc2.safesync.com/DVhWzCv/Video/Not_OK_with_N900.m4v?a=Gu0cbXqo5z0