I tried a different command line in the convert file and it's still not converting. The test.php output was this:

MEncoder SVN-r31628-4.1.2 (C) 2000-2010 MPlayer Team
success: format: 0 data: 0x0 - 0xa2c5c47
ASF file format detected.
[asfheader] Audio stream found, -aid 1
[asfheader] Video stream found, -vid 2
libavformat file format detected.

Exiting...