~$> cat awktest1.txt
111 112 113 114|121 122 123 124|131 132 133 134|141 142 143 144
 ~$> cat awktest2.txt
211 212 213 214

221 222 223 224

231 232 233 234

241 242 243 244

#! /usr/bin/awk -f

# awktest.awk file1 file2
# cant swap RS between files

BEGIN { RS="|" }

NR>ONR && ONR==1 { RS="" }
{ print $1 "." $2 "." $3 "." $4 }

# will work with with, but this is GNU only.
# ENDFILE { RS="" }
END { print "nfinal $0: n" $0 }

~$>./awktest.awk awktest1.txt awktest2.txt
111.112.113.114
121.122.123.124
131.132.133.134
141.142.143.144
211.212.213.214

final $0:
211 212 213 214

221 222 223 224

231 232 233 234

241 242 243 244