Convert from wmv/asf to mp4 - results in zero length file

[techiejustin]

I am trying to convert a wmv file to mp4.
I open ffmpegx, and I match up the resolutions and audio settings. Once I hit encode, it finished immediately and the result is a file of zero length with the mp4 extension.
I swear I got this working once a few weeks ago, but apparently I am suffering from memory loss because I just can't figure out how I did it!
Here are the specs on the wmv file thanks to the exiftool utility.

ExifTool Version Number         : 8.16
File Name                       : Test File.wmv
Directory                       : .
File Modification Date/Time     : 2009:06:01 23:14:50-04:00
File Permissions                : rw-r--r--
File Type                       : WMV
MIME Type                       : video/x-ms-wmv
File ID                         : 2F5E53E1-21E3-416A-8B4A-C7965E0CE2C0
File Size                       : 199602056
Creation Date                   : 2009:05:29 05:19:12Z
Data Packets                    : 12472
Play Duration                   : 53:05
Send Duration                   : 52:50
Preroll                         : 15000
Flags                           : 2
Min Packet Size                 : 16000
Max Packet Size                 : 16000
Max Bitrate                     : 1687464
Is VBR                          : True
ASF Leaky Bucket Pairs          : (Binary data 114 bytes, use -b option to extract)
Audio Codec Name                : Windows Media Audio 9.1
Audio Codec Description         :  48 kbps, 44 kHz, stereo 2-pass VBR
Video Codec Name                : Windows Media Video 9
Video Codec Description         : 
Audio Codec ID                  : Windows Media Audio V2 V7 V8 V9 / DivX audio (WMA) / Alex AC3 Audio
Audio Channels                  : 2
Audio Sample Rate               : 44100
Stream Type                     : Video
Error Correction Type           : No Error Correction
Time Offset                     : 0 s
Stream Number                   : 2
Image Width                     : 480
Image Height                    : 360
Image Size                      : 480x360

Here is what I set up in ffmpegx:










This time I got the failed message, but usually when I try the other mp4 codecs it appears to succeed but I get that dreaded file of zero size.

What am I doing wrong? I realize converting from Microsoft proprietary formats is probably the hardest thing for any piece of software to do, but I don't have a choice in this matter. My client insists on sending me these types of files and no matter what I do I can't stop her.

Here are one of the logs - it says the codec isn't supported which is strange since it was working before.
Ugh... Microsoft... why must you torture me so?

x264 [warning]: width or height not divisible by 16 (480x360), compression will suffer.
Sun Apr 25 21:31:15 EDT 2010
x264 [info]: using cpu capabilities MMX MMXEXT SSE SSE2 
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
  built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
mp4 [info]: initial delay 0 (scale 30000)
Seems that stream 1 comes from film source: 1000.00 (1000/1) -> 29.97 (30000/1001)
Input #0, asf, from '/Users/justin/Desktop/Test File.wmv':
  Duration: 00:52:50.3, start: 15.000000, bitrate: 503 kb/s
  Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 48 kb/s
  Stream #0.1, 29.97 fps(r): Video: WMV3 / 0x33564D57, 480x360
Output #0, yuv4mpegpipe, to 'pipe:':
  Stream #0.0, 29.97 fps(c): Video: rawvideo, 480x360, q=2-31, 200 kb/s
Stream mapping:
  Stream #0.1 -> #0.0
Unsupported codec (id=74) for input stream #0.1
x264 [info]: final ratefactor: 51.21
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
  built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5597b8]Could not find codec parameters (Video: h264, 480x360)
/Users/justin/Desktop/Test File.wmv.ff.video.mp4: could not find codec parameters

[techiejustin]

Actually folks, I figured it out.
I decided to use another utility MPEG StreamClip.