Hello, can anyone help me? i try make the flash video file more little, but i dont had success till now, is always the same like the canghe i do in the config dont have effect...

Code:
$cmd_ffmpeg = "$config[ffmpeg] -i '$video_src' -acodec libmp3lame -ar 16000 -ab 24 -f flv -b 150 $video_flv";
i put this configuration, where i mistake?

thanks.