can not encode any video

[1992girl]

Hi

my problem is that i cant encode any kind video

when I convert .wmv it gives me this error

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
Wed Aug 27 22:06:58 AST 2008
0.00 (30/1)
Input #0, asf, from '/Users/Asma/Movies/hallooowma2.wmv':
Duration: 00:04:12.4, start: 3.000000, bitrate: 263 kb/s
Stream #0.0: Audio: wmav2, 22050 Hz, stereo, 32 kb/s
Stream #0.1, 30.00 fps(r): Video: WMV3 / 0x33564D57, 320x240
Incorrect frame rate

and when I encode real it gives me a zero byte file and this is the process information

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
[NULL @ 0x54340c]Unsupported video codec
Wed Aug 27 22:13:29 AST 2008
s/Asma/Desktop/baba.rm':
Duration: 00:03:57.8, start: 0.000000, bitrate: 1138 kb/s
Stream #0.0: Audio: cook, 44100 Hz, stereo, 64 kb/s
Stream #0.1, 12.00 fps(r): Video: RV40 / 0x30345652, 720x576, 796 kb/s
Stream #0.2: Data: 0x0000
Codec type mismatch for mapping #0.0 -> #0.0

I hope that you can help me and sorry for my bad writing because i cant speak english very will

[Case]

It is not easy to convert WMV and RM on Mac OS X, but let's try anyway.

when I convert .wmv it gives me this error
Incorrect frame rate

The "Incorrect frame rate"-error could be related to how numbers are represented on your localization. Some countries use 30,00 (with a comma), some countries use "30.00" (with a point).
Check the video framerate setting in the Video tab. If it is empty, set a value. If it said "30.00" or "30,00", then change the value to "30" (without decimals) to match the source file. The preset framerates (NTSC FILM (23.976)/PAL (25)/NTSC (29.97)) are not effected by this issue.

and when I encode real it gives me a zero byte file and this is the process information
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Codec type mismatch for mapping #0.0 -> #0.0

ffmpegX can use one of three encoder engines: ffmpeg, mencoder or mpeg2enc. The error above shows that you were using an ffmpeg preset. You need to use a mencoder preset to convert RM files with ffmpegX. The ffmpeg engine is not able to convert RM files. In ffmpegX, use a target preset that has 'mencoder' in its name (h.264 mencoder, XviD mencoder or DivX mencoder).
The reason for this is that mencoder presets use mplayer to read the RM file, while ffmpeg presets do not use mplayer to read the file. And the reallib that is needed for RM is an mplayer plug-in.