ok, yea I had it on passthrough, ill try the others.
UPDATE::
Tried all of them. There is an output file, and ffmpegx just spits it out automatically. The error message I get from VLC when trying to open it is::
access_file: file /Users/Wayne/Desktop/Rat.avi is empty, aborting
access_file: file /Users/Wayne/Desktop/Rat.avi is empty, aborting
main: no suitable access module for `/Users/Wayne/Desktop/Rat.avi'
Output from ffmpegx::
Encoding started on Mon Apr 21 15:32:25 CDT 2008
FIXME:Hardenabling SSE and SSE2 without detection
MEncoder dev-CVS-060307-04:23-4.0.1 (C) 2000-2006 MPlayer Team
Mac OSX static build for ffmpegX
CPU: Intel Pentium III Katmai/Pentium III Xeon Tanner (Family: 6, Stepping: 6)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
Audio format 0x4134504d is incompatible with '-oac copy', please try '-oac pcm' instead or use '-fafmttag' to override it.
success: format: 0 data: 0x0 - 0x8c34fef3
[mkv] Track ID 1: video (V_MPEG4/ISO/AVC), -vid 0
[mkv] Track ID 2: audio (A_AAC), -aid 0, -alang eng
[mkv] Track ID 3: subtitles (S_TEXT/), -sid 0, -slang und
[mkv] Will play video track 1
[mkv] Will play audio track 2
Matroska file format detected.
VIDEO: [avc1] 960x528 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:31 fourcc:0x31637661 size:960x528 fps:23.98 ftime:=0.0417
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [scale w=960 h=528]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Forcing output fourcc to 58564944 [DIVX]
Exiting...