Can someone explain to me what this x264 command line does?

[mahsah]

x264 --crf 25 -A all --level 3 --pictiming --aud --no-psnr --thread-input --progress --output out.264 in.avs

I know it takes in.avs and makes out.264, but I want to know of a way to specify the bitrate. I dont know what any of those parameters do :(.

[smok3]

mahsah --crf 25 means quality based encoding, for bitrate based encoding you would use --bitrate switch, check x264 --help and --longhelp.