[FFmpeg-user] How to make RealPlayer files

[Programmingkid]

Hi, I'm trying to make a RealPlayer video file that is compatible with RealPlayer 6. Here is the command I used: ffmpeg-0.5 -i file -s 176x128 -r 4 -ar 8000 -ac 1 -b 30k ~/desktop/test9.rm. The resulting file works only briefly until the player just stops only half a minute into the file. Does anyone know how to make a more compatible rm file?