ffmpegX Encodes Invalid Files

[11clock]

I'm trying to convert a mpg, but it doesn't seem to be working. I have the 3 codecs it asks for, but it still doesn't work.

What happens is that it does encode the video, but I'm given a 0kb file that can't be read as a video file.

[Case]

ffmpegX keeps a log of what it was doing, as long as the ffmpegX Progress window is open.
You may access that by pressing the blue "i". This action should open a "Process Information" log.
Copy its content here for examination, so we may try to figure out what went wrong, and hopefully how to fix that.

[11clock]

Here!

Encoding started on Thu Jun 2 18:43:51 EDT 2011
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
Seems that stream 0 comes from film source: 1000.00 (1000/1) -> 20.00 (20/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/priested2/Desktop/SoundStage_movie.mpg':
Duration: 00:08:23.0, start: 0.000000, bitrate: 15225 kb/s
Stream #0.0(eng), 20.00 fps(r): Video: mpeg4, yuv420p, 1280x720
Number of stream maps must match number of output streams

[Case]

Number of stream maps must match number of output streams

ffmpegX finds one stream in your source file: an mpeg-4 video stream. If you try to convert that to some format while specifying both video and audio, then it will error. One stream in, two streams out, that is an impossible combination.
If you would like to convert with just video in the output, then you should de-activate the Encode audio checkbox in the Audio tab. (That may not be valid for all possible target formats, however.)

[11clock]

It works now. Thanks!