.MOV to MP4 w/ .MP3 audio

[dminorsound]

I've tried looking through every post where users were having issues with .mov to .mp4 conversion, but I wasn't able to find an answer to my problem.

I have a client who is requesting that their video be .mp4 with .mp3 audio. The source video is .mov.

I've selected .mp4 as my video format and .mp3 as my audio format, but when I hit encode the file is a 0kb file that's unplayable, etc.

I have the most recent version of ffmpegX.

[dminorsound]

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
Mon Jul 23 11:38:54 PDT 2012
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5597b8]negative ctts, ignoring
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/2TB/_CLIENTS/Power/Episodes/episode1.mov':
Duration: 00:04:29.9, start: 0.000000, bitrate: 4985 kb/s
Stream #0.0(eng): Audio: aac, 48000 Hz, stereo
Stream #0.1(eng), 24.00 fps(r): Video: h264, yuv420p, 1280x720
Codec type mismatch for mapping #0.0 -> #0.0

[dminorsound]

Nevermind. I managed to figure it out. Just selected the invert audio box.